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1
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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2
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INSPECT COOLING FAN RELAY NO.1
• Turn the ignition switch off.
• Remove the cooling fan relay No.1.
• Inspect the cooling fan relay No.1.
• Is there any malfunction?
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Yes
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Replace the cooling fan relay No.1, then go to Step 8.
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No
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Go to the next step.
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3
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INSPECT COOLING FAN RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT
• Cooling fan relay No.1 is removed.
• Turn the ignition switch to the ON position (engine off).
• Measure the voltage at the cooling fan relay No.1 terminal A (wiring harness-side).
• Is the voltage B+?
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Yes
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Go to the next step.
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No
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Inspect the METER 10 A fuse.
• If the fuse is melted:
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― Repair or replace the wiring harness for a possible short to ground.
― Replace the fuse.
• If the fuse is deteriorated:
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― Replace the fuse.
• If the fuse is normal:
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― Repair or replace the wiring harness for a possible open circuit.
Go to Step 8.
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4
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INSPECT COOLING FAN RELAY NO.1 CONTROL CIRCUIT FOR SHORT TO GROUND
• Cooling fan relay No.1 is removed.
• Turn the ignition switch off.
• Inspect for continuity between cooling fan relay No.1 terminal E (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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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).
Go to Step 8.
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No
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Go to the next step.
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5
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INSPECT PCM CONNECTOR CONDITION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the connector and/or terminals, then go to Step 8.
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No
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Go to the next step.
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6
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INSPECT COOLING FAN RELAY NO.1 CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY
• Cooling fan relay No.1 is removed.
• PCM connector is disconnected.
• Turn the ignition switch to the ON position (engine off).
• Measure the voltage at the cooling fan relay No.1 terminal E (wiring harness-side).
• Is there any voltage?
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Yes
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Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
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No
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Go to the next step.
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7
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INSPECT COOLING FAN RELAY NO.1 CONTROL CIRCUIT FOR OPEN CIRCUIT
• Cooling fan relay No.1 is removed.
• PCM connector is disconnected.
• Turn the ignition switch off.
• Inspect for continuity between cooling fan relay No.1 terminal E (wiring harness-side) and PCM terminal 1AV (wiring harness-side).
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair or replace the wiring harness for a possible open circuit, then go to the next step.
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8
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VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Perform the KOEO or KOER self test.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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9
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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