Engine Coolant Temperature Receiver Gauge Malfunction (From 03-2006 to 10-2006)
METER: 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 hybrid vehicle control ECU using the CAN communication lines (CAN No. 1 Bus). The meter CPU displays engine coolant temperature that is calculated based on the data received from the hybrid vehicle control ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: If there is an open or short in the engine coolant temperature sensor circuit, the hybrid vehicle control ECU outputs the DTCs. Perform troubleshooting with the "SFI System" DTC Check / Clear.
PROCEDURE
1. CHECK CAN COMMUNICATION SYSTEM
(a) Check if CAN communication DTC is output Diagnosis System.
Result:
B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the power switch on (READY).
(c) Turn the tester on.
(d) Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST.
(e) Check the operation by referring to the table below.
METER:
OK:
Needle indication is normal.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
3. READ VALUE USING INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the power switch on (READY).
(c) Turn the tester on.
(d) Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / DATA LIST.
METER:
OK:
Engine coolant temperature value displayed on the tester is almost the same as needle indication.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
4. READ VALUE USING INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the power switch on (READY).
(c) Turn the tester on.
(d) Enter the following menus: DIAGNOSIS / OBD/MOBD / HYBRID VEHICLE CONTROL ECU/ DATA LIST.
(e) Check the values by referring to the table below.
HYBRID VEHICLE CONTROL ECU:
OK:
Engine coolant temperature value displayed on the tester is almost the same as actual engine coolant temperature.
NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- Continue to next step.
5. REPLACE COMBINATION METER ASSEMBLY
(a) Replace the combination meter assembly with a new or a normal one.
OK:
The operation of the combination meter assembly returns to normal.
NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- END