Coolant Temperature Indicator/Warning Light Troubleshooting

Before testing, check the No. 8 (15A) fuse in the under-hood fuse/relay box and No. 3 (7.5A) fuse in the under-dash fuse/relay box.

1.	Start the engine and check the Malfunction Indicator Lamp (MIL). Does the MIL come on? YES - Troubleshoot the DTC, and recheck. NO - Go to 2.

2.	Disconnect the ECM connector E (40P) or ECM/PCM connector E (31P).

Check for continuity between each terminal of the ECM/PCM connector E and gauge assembly connector C (40P) No. 16 terminal.

With throttle actuator control

ECM CONNECTOR E (40P)GRNGAUGE ASSEMBLY CONNECTOR C (40P)Wire side of female terminalsGRNWire side of female terminals

Without throttle actuator control

ECM/PCM CONNECTOR E (31P)GRNGAUGE ASSEMBLY CONNECTOR C (40P)Wire side of female terminalsGRNWire side of female terminals

Is there continuity?

YES - Replace the gauge assembly and recheck.n

NO - Check the open in the wire and the connection condition of the terminal.n