DTC P0480:00 [SKYACTIV-D 2.2]

DTC P0480:00	Fan control module No.1 control circuit problem
DETECTION CONDITION	• The PCM monitors the input voltage from the fan control module No.1. If the voltage at the PCM terminal 2BG remains low or high for 5 s, the PCM determines that the fan control circuit has a malfunction. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. • DTC is not stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	• Fan control module No.1 connector or terminals malfunction • Cooling fan relay No.1 malfunction • Short to ground or open circuit in cooling fan relay No.1 power supply circuit ― Short to ground in wiring harness between MAIN 200 A fuse and cooling fan relay No.1 terminal A ― MAIN 200 A fuse malfunction ― FAN DE 40 A fuse malfunction ― Open circuit in wiring harness between battery positive terminal and cooling fan relay No.1 terminal A • Short to ground or open circuit in cooling fan relay No.1 power supply circuit ― Short to ground in wiring harness between ENGINE3 15 A fuse and cooling fan relay No.1 terminal B ― ENGINE3 15 A fuse malfunction ― Open circuit in wiring harness between main relay terminal D and cooling fan relay No.1 terminal B • Short to ground in wiring harness between the following terminals: ― Cooling fan relay No.1 terminal C—Fan control module No.1 terminal A ― Cooling fan relay No.1 terminal D—PCM terminal 2AU • PCM connector or terminals malfunction • Open circuit in wiring harness between the following terminals: ― Cooling fan relay No.1 terminal C—Fan control module No.1 terminal A ― Cooling fan relay No.1 terminal D—PCM terminal 2AU • Open circuit in wiring harness between fan control module No.1 terminal C and body ground • Short to ground in wiring harness between fan control module No.1 terminal B and PCM terminal 2BG • Short to power supply in wiring harness between fan control module No.1 terminal B and PCM terminal 2BG • Open circuit in wiring harness between fan control module No.1 terminal B and PCM terminal 2BG • Fan control module No.1 malfunction • PCM malfunction

DTC P0480:00

Fan control module No.1 control circuit problem

DETECTION CONDITION

• The PCM monitors the input voltage from the fan control module No.1. If the voltage at the PCM terminal 2BG remains low or high for 5 s, the PCM determines that the fan control circuit has a malfunction.

Diagnostic support note

• This is a continuous monitor (other).

• The check engine light does not illuminate.

• FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.

• DTC is not stored in the PCM memory.

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

• Fan control module No.1 connector or terminals malfunction

• Cooling fan relay No.1 malfunction

• Short to ground or open circuit in cooling fan relay No.1 power supply circuit

― Short to ground in wiring harness between MAIN 200 A fuse and cooling fan relay No.1 terminal A

― MAIN 200 A fuse malfunction

― FAN DE 40 A fuse malfunction

― Open circuit in wiring harness between battery positive terminal and cooling fan relay No.1 terminal A

• Short to ground or open circuit in cooling fan relay No.1 power supply circuit

― Short to ground in wiring harness between ENGINE3 15 A fuse and cooling fan relay No.1 terminal B

― ENGINE3 15 A fuse malfunction

― Open circuit in wiring harness between main relay terminal D and cooling fan relay No.1 terminal B

• Short to ground in wiring harness between the following terminals:

― Cooling fan relay No.1 terminal C—Fan control module No.1 terminal A

― Cooling fan relay No.1 terminal D—PCM terminal 2AU

• PCM connector or terminals malfunction

• Open circuit in wiring harness between the following terminals:

― Cooling fan relay No.1 terminal C—Fan control module No.1 terminal A

― Cooling fan relay No.1 terminal D—PCM terminal 2AU

• Open circuit in wiring harness between fan control module No.1 terminal C and body ground

• Short to ground in wiring harness between fan control module No.1 terminal B and PCM terminal 2BG

• Short to power supply in wiring harness between fan control module No.1 terminal B and PCM terminal 2BG

• Open circuit in wiring harness between fan control module No.1 terminal B and PCM terminal 2BG

• Fan control module No.1 malfunction

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
2	INSPECT FAN CONTROL MODULE NO.1 CONNECTOR CONDITION • Switch the ignition off. • Disconnect the fan control module No.1 connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 18.
No	Go to the next step.
3	DETERMINE IF MALFUNCTION CAUSE IS FAN CONTROL MODULE NO.1 POWER SUPPLY CIRCUIT OR OTHER • Verify that the fan control module No.1 connector is disconnected. • Switch the ignition ON (engine off). • Measure the voltage at the fan control module No.1 terminal A (wiring harness-side). • Is the voltage B+?	Yes	Go to Step 12.
No	Go to the next step.
4	INSPECT COOLING FAN RELAY NO.1 • Switch the ignition off. • Remove the cooling fan relay No.1. • Inspect the cooling fan relay No.1. (See RELAY INSPECTION.) • Is there any malfunction?	Yes	Replace the cooling fan relay No.1, then go to Step 18.
No	Go to the next step.
5	INSPECT COOLING FAN RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Cooling fan relay No.1 is removed. • Verify that the fan control module No.1 connector is disconnected. • Measure the voltage at the cooling fan relay No.1 terminal A (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
No	Inspect the MAIN 200 A fuse and FAN DE 40 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and cooling fan relay No.1 terminal A. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. • Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If all fuses are normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and cooling fan relay No.1 terminal A. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 18.
6	INSPECT COOLING FAN RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Cooling fan relay No.1 is removed. • Verify that the fan control module No.1 connector is disconnected. • Switch the ignition ON (engine off). • Measure the voltage at the cooling fan relay No.1 terminal B (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
No	Inspect the ENGINE3 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE3 15 A fuse and cooling fan relay No.1 terminal B. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. • Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal D and cooling fan relay No.1 terminal B. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 18.
7	INSPECT FAN CONTROL MODULE NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Cooling fan relay No.1 is removed. • Verify that the fan control module No.1 connector is disconnected. • Inspect for continuity between cooling fan relay No.1 terminal C (wiring harness-side) and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal C and fan control module No.1 terminal A. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to Step 18.
No	Go to the next step.
8	INSPECT COOLING FAN RELAY NO.1 CONTROL CIRCUIT FOR SHORT TO GROUND • Cooling fan relay No.1 is removed. • Verify that the fan control module No.1 connector is disconnected. • Inspect for continuity between cooling fan relay No.1 terminal D (wiring harness-side) and body ground. • Is there continuity?	Yes	If the short to ground circuit could be detected in the wiring harness: • Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal D and PCM terminal 2AU. If there is a common connector: ― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. ― Repair or replace the malfunctioning part. If there is no common connector: ― Repair or replace the wiring harness which has a short to ground. If the short to ground circuit could not be detected in the wiring harness: • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to Step 18.
No	Go to the next step.
9	INSPECT FAN CONTROL MODULE NO.1 POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Cooling fan relay No.1 is removed. • Verify that the fan control module No.1 connector is disconnected. • Inspect for continuity between cooling fan relay No.1 terminal C (wiring harness-side) and fan control module No.1 terminal A (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
No	Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal C and fan control module No.1 terminal A. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 18.
10	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 18.
No	Go to the next step.
11	INSPECT COOLING FAN RELAY NO.1 CONTROL CIRCUIT FOR OPEN CIRCUIT • Cooling fan relay No.1 is removed. • Verify that the fan control module No.1 and PCM connectors are disconnected. • Inspect for continuity between cooling fan relay No.1 terminal D (wiring harness-side) and PCM terminal 2AU (wiring harness-side). • Is there continuity?	Yes	Go to Step 18.
No	Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal D and PCM terminal 2AU. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 18.
12	INSPECT FAN CONTROL MODULE NO.1 GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the fan control module No.1 connector is disconnected. • Switch the ignition off. • Inspect for continuity between fan control module No.1 terminal C (wiring harness-side) and body ground. • Is there continuity?	Yes	Go to the next step.
No	Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal C and body ground. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Inspect for the following: ― Open circuit between fan control module No.1 and body ground ― Loose or lifting ground point • Repair or replace the malfunctioning part. Go to Step 18.
13	INSPECT FAN CONTROL MODULE NO.1 SIGNAL CIRCUIT FOR SHORT TO GROUND • Verify that the fan control module No.1 connector is disconnected. • Inspect for continuity between fan control module No.1 terminal B (wiring harness-side) and body ground. • Is there continuity?	Yes	If the short to ground circuit could be detected in the wiring harness: • Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal B and PCM terminal 2BG. If there is a common connector: ― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. ― Repair or replace the malfunctioning part. If there is no common connector: ― Repair or replace the wiring harness which has a short to ground. If the short to ground circuit could not be detected in the wiring harness: • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to Step 18.
No	Go to the next step.
14	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 18.
No	Go to the next step.
15	INSPECT FAN CONTROL MODULE NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the fan control module No.1 and PCM connectors are disconnected. • Switch the ignition ON (engine off). • Measure the voltage at the fan control module No.1 terminal B (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
No	Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal B and PCM terminal 2BG. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 18.
16	INSPECT FAN CONTROL MODULE NO.1 SIGNAL CIRCUIT FOR OPEN CIRCUIT • Verify that the fan control module No.1 and PCM connectors are disconnected. • Switch the ignition off. • Inspect for continuity between fan control module No.1 terminal B (wiring harness-side) and PCM terminal 2BG (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
No	Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal B and PCM terminal 2BG. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 18.
17	INSPECT FAN CONTROL MODULE NO.1 • Inspect the fan control module No.1. (See FAN CONTROL MODULE INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the fan control module No.1, then go to the next step. (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No	Go to the next step.
18	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Perform the KOEO self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 2.2].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to the next step.
No	Go to the next step.
19	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

• Verify related Service Information availability.

• Is any related Service Information available?

Yes

Perform repair or diagnosis according to the available Service Information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

INSPECT FAN CONTROL MODULE NO.1 CONNECTOR CONDITION

• Switch the ignition off.

• Disconnect the fan control module No.1 connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 18.

Go to the next step.

DETERMINE IF MALFUNCTION CAUSE IS FAN CONTROL MODULE NO.1 POWER SUPPLY CIRCUIT OR OTHER

• Verify that the fan control module No.1 connector is disconnected.

• Switch the ignition ON (engine off).

• Measure the voltage at the fan control module No.1 terminal A (wiring harness-side).

• Is the voltage B+?

Yes

Go to Step 12.

Go to the next step.

INSPECT COOLING FAN RELAY NO.1

• Switch the ignition off.

• Remove the cooling fan relay No.1.

• Inspect the cooling fan relay No.1.

(See RELAY INSPECTION.)

• Is there any malfunction?

Yes

Replace the cooling fan relay No.1, then go to Step 18.

Go to the next step.

INSPECT COOLING FAN RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Cooling fan relay No.1 is removed.

• Verify that the fan control module No.1 connector is disconnected.

• Measure the voltage at the cooling fan relay No.1 terminal A (wiring harness-side).

• Is the voltage B+?

Yes

Go to the next step.

Inspect the MAIN 200 A fuse and FAN DE 40 A fuse.

• If the fuse is blown:

― Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and cooling fan relay No.1 terminal A.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

• Replace the fuse.

• If the fuse is damaged:

― Replace the fuse.

• If all fuses are normal:

― Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and cooling fan relay No.1 terminal A.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 18.

INSPECT COOLING FAN RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Cooling fan relay No.1 is removed.

• Verify that the fan control module No.1 connector is disconnected.

• Switch the ignition ON (engine off).

• Measure the voltage at the cooling fan relay No.1 terminal B (wiring harness-side).

• Is the voltage B+?

Yes

Go to the next step.

Inspect the ENGINE3 15 A fuse.

• If the fuse is blown:

― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE3 15 A fuse and cooling fan relay No.1 terminal B.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

• Replace the fuse.

• If the fuse is damaged:

― Replace the fuse.

• If the fuse is normal:

― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal D and cooling fan relay No.1 terminal B.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 18.

INSPECT FAN CONTROL MODULE NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND

• Cooling fan relay No.1 is removed.

• Verify that the fan control module No.1 connector is disconnected.

• Inspect for continuity between cooling fan relay No.1 terminal C (wiring harness-side) and body ground.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal C and fan control module No.1 terminal A.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 18.

Go to the next step.

INSPECT COOLING FAN RELAY NO.1 CONTROL CIRCUIT FOR SHORT TO GROUND

• Cooling fan relay No.1 is removed.

• Verify that the fan control module No.1 connector is disconnected.

• Inspect for continuity between cooling fan relay No.1 terminal D (wiring harness-side) and body ground.

• Is there continuity?

Yes

If the short to ground circuit could be detected in the wiring harness:

• Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal D and PCM terminal 2AU.

If there is a common connector:

― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

― Repair or replace the malfunctioning part.

If there is no common connector:

― Repair or replace the wiring harness which has a short to ground.

If the short to ground circuit could not be detected in the wiring harness:

• Replace the PCM (short to ground in the PCM internal circuit).

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to Step 18.

Go to the next step.

INSPECT FAN CONTROL MODULE NO.1 POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

• Cooling fan relay No.1 is removed.

• Verify that the fan control module No.1 connector is disconnected.

• Inspect for continuity between cooling fan relay No.1 terminal C (wiring harness-side) and fan control module No.1 terminal A (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal C and fan control module No.1 terminal A.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 18.

INSPECT PCM CONNECTOR CONDITION

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 18.

Go to the next step.

INSPECT COOLING FAN RELAY NO.1 CONTROL CIRCUIT FOR OPEN CIRCUIT

• Cooling fan relay No.1 is removed.

• Verify that the fan control module No.1 and PCM connectors are disconnected.

• Inspect for continuity between cooling fan relay No.1 terminal D (wiring harness-side) and PCM terminal 2AU (wiring harness-side).

• Is there continuity?

Yes

Go to Step 18.

Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal D and PCM terminal 2AU.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 18.

INSPECT FAN CONTROL MODULE NO.1 GROUND CIRCUIT FOR OPEN CIRCUIT

• Verify that the fan control module No.1 connector is disconnected.

• Switch the ignition off.

• Inspect for continuity between fan control module No.1 terminal C (wiring harness-side) and body ground.

• Is there continuity?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal C and body ground.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Inspect for the following:

― Open circuit between fan control module No.1 and body ground

― Loose or lifting ground point

• Repair or replace the malfunctioning part.

Go to Step 18.

INSPECT FAN CONTROL MODULE NO.1 SIGNAL CIRCUIT FOR SHORT TO GROUND

• Verify that the fan control module No.1 connector is disconnected.

• Inspect for continuity between fan control module No.1 terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

If the short to ground circuit could be detected in the wiring harness:

• Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal B and PCM terminal 2BG.

If there is a common connector:

― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

― Repair or replace the malfunctioning part.

If there is no common connector:

― Repair or replace the wiring harness which has a short to ground.

If the short to ground circuit could not be detected in the wiring harness:

• Replace the PCM (short to ground in the PCM internal circuit).

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to Step 18.

Go to the next step.

INSPECT PCM CONNECTOR CONDITION

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 18.

Go to the next step.

INSPECT FAN CONTROL MODULE NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

• Verify that the fan control module No.1 and PCM connectors are disconnected.

• Switch the ignition ON (engine off).

• Measure the voltage at the fan control module No.1 terminal B (wiring harness-side).

• Is the voltage 0 V?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal B and PCM terminal 2BG.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 18.

INSPECT FAN CONTROL MODULE NO.1 SIGNAL CIRCUIT FOR OPEN CIRCUIT

• Verify that the fan control module No.1 and PCM connectors are disconnected.

• Switch the ignition off.

• Inspect for continuity between fan control module No.1 terminal B (wiring harness-side) and PCM terminal 2BG (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between fan control module No.1 terminal B and PCM terminal 2BG.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 18.

INSPECT FAN CONTROL MODULE NO.1

• Inspect the fan control module No.1.

(See FAN CONTROL MODULE INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Replace the fan control module No.1, then go to the next step.

(See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.