Communication Signal (Meter Upper) Circuit

COMMUNICATION SIGNAL (METER ->UPPER) CIRCUIT

Description

The communication line (METER UPPER) is used to communicate signals between the combination meter and the upper meter in order to control the upper meter.


Diagnosis Procedure


1. CHECK CONNECTOR

Check combination meter, upper meter and terminals (combination meter side, upper meter side, and harness side) for looseness or bent.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair terminal or connector.
UPPER) SIGNAL CIRCUIT

2. CHECK COMMUNICATION LINE (METER [ADD PUNCTUATION/SYMBOL]

1.Power switch OFF.
2.Disconnect combination meter and upper meter connector.
3.Check continuity between combination meter harness connector and upper harness connector.

4.Check continuity between combination meter harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector.
UPPER) OUTPUT SIGNAL

3. CHECK COMMUNICATION LINE (METER [ADD PUNCTUATION/SYMBOL]

1.Connect combination meter and upper meter connector.
2.Power switch ON.
3.Check voltage between combination meter and ground.





Is the inspection result normal?
YES- Replace upper meter. Refer to "Removal and Installation" Removal And Installation.
NO- Replace combination meter. Refer to "Removal and Installation" Removal And Installation.