Coolant Temperature Gauge Troubleshooting

Before testing, check the No. 9 (10 A) fuse in the under-dash fuse/relay box and No. 10 (7.5 A) fuse in the under-dash fuse/relay box.

1. Start the engine and check the Malfunction Indicator Lamp (MIL).

   Does the MIL come on? 

   1. YES  - Troubleshooting the DTC (see MIL CIRCUIT TROUBLESHOOTING ), and recheck.
   2. NO  - Go to step 2.
2. Check the multiplex control unit DTC (see TROUBLESHOOTING ).

   Is there a DTC? 

   1. YES  - Troubleshooting the DTC (see TROUBLESHOOTING ), and recheck.
   2. NO  - Inspect the connector and socket terminals of the gauge assembly connectors. If the terminals look OK, replace the gauge assembly