DTC Diagnosis Procedure
- CHECK ECT SENSOR 1 POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect engine coolant temperature (ECT) sensor 1 harness connector.
- Turn ignition switch ON.
- Check the voltage between ECT sensor 1 harness connector and ground.
ECT sensor 1 Ground Voltage
(Approx.)Connector Terminal F86 1 Ground 5 V
Is the inspection result normal?
YES>>
GO TO 3.
NO>>
GO TO 2.
- CHECK ECT SENSOR 1 POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between ECT sensor 1 harness connector and ECM harness connector.
ECT sensor 1 ECM Continuity Connector Terminal Connector Terminal F86 1 F143 48 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>
Perform trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure .
NO>>
Repair or replace error-detected parts.
- CHECK ECT SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between ECT sensor 1 harness connector and ECM harness connector.
ECT sensor 1 ECM Continuity Connector Terminal Connector Terminal F86 2 F143 29 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>
GO TO 4.
NO>>
Repair or replace error-detected parts.
- CHECK ECM GROUND CIRCUIT
- Check the continuity between ECM harness connector and ground.
+ - Continuity ECM Connector Terminal F143 3 Ground Existed F142 87 88 E152 199 201 204 - Also check harness for short to power.
Is the inspection result normal?
YES>>
GO TO 5.
NO>>
Repair or replace error-detected parts.
- Check the continuity between ECM harness connector and ground.
- CHECK ENGINE COOLANT TEMPERATURE SENSOR 1
Refer to Component Inspection . Is the inspection result normal?
YES>>
INSPECTION END
NO>>
Replace engine coolant temperature sensor 1. Refer to MULTI-WAY CONTROL VALVE : Exploded View .