Malfunction in Water Temperature Warning Light

METER: METER / GAUGE SYSTEM: Malfunction in Water Temperature Warning Light

Malfunction in Water Temperature Warning Light

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT:
- Start the inspection from step 1 when using the Techstream and start from step 2 when not using an intelligent tester.
- If there is an open or short in the engine coolant temperature sensor circuit, the ECM outputs DTCs. Troubleshoot those DTCs by following the SFI System.
2TR-FE:
1GR-FE:

PROCEDURE

1. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) On the Techstream, select the following menu items: Powertrain / Engine / Coolant Temperature.
(e) Read the value displayed on the Techstream.
Standard:
Between 80°C and 97°C (176°F and 207°F) with the engine warmed up.
NG -- GO TO ENGINE CONTROL SYSTEM
OK -- Continue to next step.
2. INSPECT COMBINATION METER ASSEMBLY





(a) Disconnect the C9 combination meter connector.
(b) Measure the voltage.
Standard Voltage:





(c) Reconnect the combination meter connector.
OK -- REPLACE COMBINATION METER ASSEMBLY
NG -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)





(a) Disconnect the C9 combination meter connector.
(b) Disconnect the E7 ECM connector.
(c) Measure the resistance.
Standard Resistance:





(d) Reconnect the ECM connector.
(e) Reconnect the combination meter connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM