Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair 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. 2 AND NO. 3 Switch the ignition to off. Remove the cooling fan relay No. 2 and No. 3. Inspect the cooling fan relay No. 2 and No. 3. (See RELAY INSPECTION .) Is there any malfunction?	Yes	Replace the cooling fan relay No. 2 and/or No. 3, then go to Step 8.
2		No	Go to the next step.
3	INSPECT COOLING FAN RELAY NO. 2 AND NO. 3 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Cooling fan relay No. 2 and No. 3 are removed. Measure the voltage at the following terminals (wiring harness-side): Cooling fan relay No. 2 terminal A Cooling fan relay No. 3 terminal A Is the voltage B+ ?	Yes	Go to the next step.
3		No	Inspect the ENG+B 10 A fuse. If the fuse is blown: Repair or replace the wiring harness for a possible short to ground. Replace the fuse. If the fuse is deteriorated: Replace the fuse. If the fuse is normal: Repair or replace the wiring harness for a possible open circuit. Go to Step 8.
4	INSPECT COOLING FAN RELAY NO. 2 AND NO. 3 SIGNAL CIRCUIT FOR SHORT TO GROUND Cooling fan relay No. 2 and No. 3 are removed. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Cooling fan relay No. 2 terminal E Cooling fan relay No. 3 terminal E Is there continuity?	Yes	If the short to ground circuit could be detected: Repair or replace the wiring harness for a possible short to ground. If the short to ground circuit could not be detected: Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION .) 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. 2 AND NO. 3 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY Cooling fan relay No. 2 and No. 3 are removed. Verify that the PCM connector is disconnected. Switch the ignition to ON (engine off). Measure the voltage at the following terminals (wiring harness-side): Cooling fan relay No. 2 terminal E Cooling fan relay No. 3 terminal E Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
6		No	Go to the next step.
7	INSPECT COOLING FAN RELAY NO. 2 AND NO. 3 SIGNAL CIRCUIT FOR OPEN CIRCUIT Cooling fan relay No. 2 and No. 3 are removed. Verify that the PCM connector is disconnected. Switch the ignition to off. Inspect for continuity between the following terminals (wiring harness-side): Cooling fan relay No. 2 terminal E-PCM terminal 1R Cooling fan relay No. 3 terminal E-PCM terminal 1R Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE .) Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION .) 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 .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
9		No	DTC troubleshooting completed.