DTC P0480:00 [SKYACTIV-D 2.2]


id0102s4704600

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

Diagnostic Procedure

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.
•  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).
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).
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.
•  Is there any malfunction?
Yes
Replace the fan control module No.1, then go to the next step.
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.
•  Perform the KOEO self test.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
19
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.