Engine Coolant Temperature Receiver Gauge Malfunction

METER / GAUGE SYSTEM: Engine Coolant Temperature Receiver Gauge Malfunction

Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

- In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN and BEAN communication lines.
- The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: If there is an open or short in the engine coolant temperature sensor circuit, the ECM outputs the DTCs. Perform troubleshooting with the "SFI System". DTC Check / Clear

PROCEDURE

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester ON.
(d) Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST.
(e) Check the operation by referring to the values in the table below.

METER:





OK:
Needle indication is normal.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
2. READ VALUE USING INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester ON.
(d) Enter the following menus: DIAGNOSIS / OBD/MOBD / ENGINE / DATA LIST.
(e) Check the value(s) by referring to the values in the table below.

ENGINE:





OK:
Engine coolant temperature displayed on the tester is almost the same as needle indication.
NG -- GO TO SFI SYSTEM
OK -- Continue to next step.
3. REPLACE COMBINATION METER ASSEMBLY
(a) Replace the combination meter assembly with a new or normal one.
OK:
The operation of the combination meter returns to normal.
NG -- REPLACE ECM
OK -- END