DTC P0480:00 [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0102h9704600

DTC P0480:00

Cooling fan relay No.1 control circuit malfunction

DETECTION CONDITION

•  The cooling fan relay No.1 control voltage at the PCM terminal 2AU is low or cooling fan relay No.1 control current is high for a continuous 5 s relative to the PCM control signal.

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

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

•  Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

•  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 ENGINE3 15 A fuse and cooling fan relay No.1 terminal A

―  ENGINE3 15 A fuse malfunction

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

•  Short to ground in wiring harness between cooling fan relay No.1 terminal E and PCM terminal 2AU

•  PCM connector or terminals malfunction

•  Short to power supply in wiring harness between cooling fan relay No.1 terminal E and PCM terminal 2AU

•  Open circuit in wiring harness between cooling fan relay No.1 terminal E and PCM terminal 2AU

•  PCM malfunction

DTC P0480:00	Cooling fan relay No.1 control circuit malfunction
DETECTION CONDITION	• The cooling fan relay No.1 control voltage at the PCM terminal 2AU is low or cooling fan relay No.1 control current is high for a continuous 5 s relative to the PCM control signal. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2) is not available. • Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	• 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 ENGINE3 15 A fuse and cooling fan relay No.1 terminal A ― ENGINE3 15 A fuse malfunction ― Open circuit in wiring harness between main relay terminal D and cooling fan relay No.1 terminal A • Short to ground in wiring harness between cooling fan relay No.1 terminal E and PCM terminal 2AU • PCM connector or terminals malfunction • Short to power supply in wiring harness between cooling fan relay No.1 terminal E and PCM terminal 2AU • Open circuit in wiring harness between cooling fan relay No.1 terminal E and PCM terminal 2AU • 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.
1		No	Go to the next step.
2	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 8.
2		No	Go to the next step.
3	INSPECT COOLING FAN RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Cooling fan relay No.1 is removed. • Switch the ignition ON (engine off). • 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.
3		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 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 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 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 8.
4	INSPECT COOLING FAN RELAY NO.1 SIGNAL CIRCUIT FOR SHORT TO GROUND • Cooling fan relay No.1 is removed. • Switch the ignition off. • Inspect for continuity between cooling fan relay No.1 terminal E (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 E 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-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to Step 8.
4		No	Go to the next step.
5	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 8.
5		No	Go to the next step.
6	INSPECT COOLING FAN RELAY NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Cooling fan relay No.1 is removed. • Verify that the PCM connector is disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the cooling fan relay No.1 terminal E (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal E 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 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 8.
7	INSPECT COOLING FAN RELAY NO.1 SIGNAL CIRCUIT FOR OPEN CIRCUIT • Cooling fan relay No.1 is removed. • Verify that the PCM connector is disconnected. • Switch the ignition off. • Inspect for continuity between cooling fan relay No.1 terminal E (wiring harness-side) and PCM terminal 2AU (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay No.1 terminal E 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 the next step.
8	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-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
9		No	DTC troubleshooting completed.