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1
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VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
• Have the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (engine cooling system related) been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on repair order, then go to the next step.
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2
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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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3
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INSPECT ECT SENSOR CONNECTOR CONDITION
• Switch the ignition off.
• Disconnect the ECT sensor 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 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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4
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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 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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5
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INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
• Verify that the ECT sensor and PCM connectors are disconnected.
• Switch the ignition ON (engine off).
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Note
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• Another DTC may be stored by the PCM detecting an open circuit.
• Measure the voltage at the ECT sensor terminal A (wiring harness-side).
• Is the voltage 0 V?
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Yes
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Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between ECT sensor terminal A and PCM terminal 2AG.
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.
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6
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INSPECT ECT SENSOR CIRCUIT FOR OPEN CIRCUIT
• Verify that the ECT sensor and PCM connectors are disconnected.
• Switch the ignition off.
• Inspect for continuity between the following terminals (wiring harness-side):
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― ECT sensor terminal A—PCM terminal 2AG
― ECT sensor terminal B—PCM terminal 2AD
• 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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Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
• ECT sensor terminal A—PCM terminal 2AG
• ECT sensor terminal B—PCM terminal 2AD
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.
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7
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INSPECT ECT SENSOR
• Inspect the ECT sensor.
• Is there any malfunction?
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Yes
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Replace the ECT sensor, then go to the next step.
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No
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Go to the next step.
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8
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VERIFY DTC TROUBLESHOOTING COMPLETED
• Always reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine and warm it up completely.
• 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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