DTC P0480:00 [PCM (SKYACTIV-G 2.5T)]

id0102s8704600

DTC P0480:00	Cooling fan control circuit malfunction
DETECTION CONDITION	• The PCM monitors the input voltage from the fan control module. If the voltage at the PCM terminal 2AQ remains low or high, 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 is not available. • Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• Fan control module connector or terminals malfunction • Cooling fan relay malfunction • Short to ground or open circuit in cooling fan relay power supply circuit ? Short to ground in wiring harness between FAN 80 A fuse and cooling fan relay terminal A ? FAN 80 A fuse malfunction ? Open circuit in wiring harness between battery positive terminal and cooling fan relay terminal A • Short to ground or open circuit in cooling fan relay power supply circuit ? Short to ground in wiring harness between ENGINE3 15 A fuse and cooling fan relay terminal B ? ENGINE3 15 A fuse malfunction ? Open circuit in wiring harness between main relay terminal C and cooling fan relay terminal B • Open circuit in wiring harness between fan control module terminal A and body ground • Short to ground in wiring harness between cooling fan relay terminal C and fan control module terminal D • Open circuit in wiring harness between cooling fan relay terminal C and fan control module terminal D • PCM connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ? Fan control module terminal C—PCM terminal 2AQ ? Cooling fan relay terminal D—PCM terminal 2BA • Short to power supply in wiring harness between fan control module terminal C and PCM terminal 2AQ • Open circuit in wiring harness between the following terminals: ? Fan control module terminal C—PCM terminal 2AQ ? Cooling fan relay terminal D—PCM terminal 2BA • Fan control module malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the snapshot data on the repair order.	—	Go to the next step.
2	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.
2		No	Go to the next step.
3	INSPECT FAN CONTROL MODULE CONNECTOR CONDITION • Switch the ignition off. • Disconnect the fan control module 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 15.
3		No	Go to the next step.
4	INSPECT COOLING FAN RELAY • Remove the cooling fan relay. (See RELAY LOCATION.) • Inspect the cooling fan relay. (See RELAY INSPECTION.) • Is there any malfunction?	Yes	Replace the cooling fan relay, then go to Step 15.
4		No	Go to the next step.
5	INSPECT COOLING FAN RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Cooling fan relay is removed. • Verify that the fan control module connector is disconnected. • Measure the voltage at the cooling fan relay terminal A (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
5		No	Inspect the FAN 80 A fuse. • If the fuse is blown: ? Refer to the wiring diagram and verify whether or not there is a common connector between FAN 80 A fuse and cooling fan relay 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 battery positive terminal and cooling fan relay 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 15.
6	INSPECT COOLING FAN RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Cooling fan relay is removed. • Verify that the fan control module connector is disconnected. • Switch the ignition ON (engine off). • Measure the voltage at the cooling fan relay terminal B (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
6		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 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 C and cooling fan relay 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 15.
7	INSPECT FAN CONTROL MODULE GROUND CIRCUIT FOR OPEN CIRCUIT • Cooling fan relay is removed. • Verify that the fan control module connector is disconnected. • Switch the ignition off. • Inspect for continuity between fan control module terminal A (wiring harness-side) and body ground. • 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 fan control module terminal A 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 and body ground ? Loose or lifting ground point • Repair or replace the malfunctioning part. Go to Step 15.
8	INSPECT FAN CONTROL MODULE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Cooling fan relay is removed. • Verify that the fan control module connector is disconnected. • Inspect for continuity between cooling fan relay 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 terminal C and fan control module terminal D. 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 15.
8		No	Go to the next step.
9	INSPECT FAN CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Cooling fan relay is removed. • Verify that the fan control module connector is disconnected. • Inspect for continuity between cooling fan relay terminal C (wiring harness-side) and fan control module terminal D (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between cooling fan relay terminal C and fan control module terminal D. 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 15.
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 15.
10		No	Go to the next step.
11	INSPECT FAN CONTROL MODULE AND COOLING FAN RELAY CIRCUIT FOR SHORT TO GROUND • Cooling fan relay is removed. • Verify that the fan control module and PCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ? Fan control module terminal C ? Cooling fan relay terminal D • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Fan control module terminal C—PCM terminal 2AQ • Cooling fan relay terminal D—PCM terminal 2BA 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 15.
11		No	Go to the next step.
12	INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Cooling fan relay is removed. • Verify that the fan control module and PCM connectors are 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 fan control module terminal C (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
12		No	Refer to the wiring diagram and verify whether or not there is a common connector between fan control module terminal C and PCM terminal 2AQ. 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 15.
13	INSPECT FAN CONTROL MODULE AND COOLING FAN RELAY CIRCUIT FOR OPEN CIRCUIT • Cooling fan relay is removed. • Verify that the fan control module and PCM connectors are disconnected. • Switch the ignition off. • Inspect for continuity between the following terminals (wiring harness-side): ? Fan control module terminal C—PCM terminal 2AQ ? Cooling fan relay terminal D—PCM terminal 2BA • Is there continuity?	Yes	Go to the next step.
13		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Fan control module terminal C—PCM terminal 2AQ • Cooling fan relay terminal D—PCM terminal 2BA 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 15.
14	INSPECT FAN CONTROL MODULE • Inspect the fan control module. (See FAN CONTROL MODULE INSPECTION [SKYACTIV-G 2.5T].) • Is there any malfunction?	Yes	Replace the fan control module, then go to the next step. (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
14		No	Go to the next step.
15	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.5T)].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-G 2.5T)].) • 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 2.5T].) Go to the next step.
15		No	Go to the next step.
16	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
16		No	DTC troubleshooting completed.