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DTC P0481:00 [PCM (SKYACTIV-G)]

DTC P0481:00 [PCM (SKYACTIV-G)]

SM2334529


id0102t4704700



Outline

System malfunction location

Cooling fan relay No.2 control circuit malfunction

Detection condition
• The cooling fan relay No.2 control voltage at the PCM terminal 2AS is low or cooling fan relay No.2 control current is high for a continuous 5 s relative to the PCM control signal.
Fail-safe
• Not applicable
Possible cause
• Cooling fan relay No.2 malfunction
• PCM connector or terminals malfunction
• F10 15 A fuse malfunction
• Short to ground in cooling fan relay No.2 power supply circuit
• Open circuit in cooling fan relay No.2 power supply circuit
• Short to ground in cooling fan relay No.2 control circuit
• Short to power supply in cooling fan relay No.2 control circuit
• Open circuit in cooling fan relay No.2 control circuit
• PCM malfunction



Diagnostic Procedure

Step

Inspection

Results

Action

1
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the freeze frame data/snapshot data.

Note
• Recording can be facilitated using the screen capture function of the PC.
Go to the next step.
2
VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins, on-line repair information, or Service Information availability.
• Is any related Information available?
Yes
Perform repair or diagnosis according to the available information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT COOLING FAN RELAY No.2 FOR MALFUNCTION
• Inspect the applicable part. (See RELAY INSPECTION.)
• Is the part normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
4
INSPECT PCM CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
5
INSPECT F10 15 A FUSE
• Remove the F10 15 A fuse.
• Inspect the F10 15 A fuse.
• Is the fuse normal?
Yes
Reinstall the F10 15 A fuse, then go to the next step.
No
Replace the F10 15 A fuse and perform the repair completion verification.
6
INSPECT COOLING FAN RELAY No.2 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
• Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
7
INSPECT COOLING FAN RELAY No.2 POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
8
INSPECT COOLING FAN RELAY No.2 CONTROL CIRCUIT FOR SHORT TO GROUND
• Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
9
INSPECT COOLING FAN RELAY No.2 CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY
• Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
10
INSPECT COOLING FAN RELAY No.2 CONTROL CIRCUIT FOR OPEN CIRCUIT
• Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1
VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory. (See CLEARING DTC.)
• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
― Perform the KOEO or KOER self test. (See DTC INSPECTION.)
• Perform the DTC inspection for the PCM. (See DTC INSPECTION.)
• Is the same Pending DTC present?
Yes
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
No
Go to the next step.
Repair completion verification 2
VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.