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Diagnostic Procedure
NFEC0861
1 CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature (ECT) sensor harness connector.
SEC105D
3. Turn ignition switch “ON”.
4. Check voltage between ECT sensor harness connector terminal 1 and ground with CONSULT-II or tester.
SEC106D
OK or NG
OK © GO TO 3.
NG © GO TO 2.
2 DETECT MALFUNCTIONING PART
Check harness for open or short between ECM and engine coolant temperature sensor.
© Repair harness or connectors.
3 CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between ECT sensor terminal 2 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
I Harness for open between ECM and engine coolant temperature sensor
I Harness for open between TCM (Transmission Control Module) and engine coolant temperature sensor
© Repair open circuit or short to power in harness or connectors.
DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
EC-210
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