Test B: The Message Center Switch Does Not Operate Correctly

PINPOINT TEST B: THE MESSAGE CENTER SWITCH DOES NOT OPERATE CORRECTLY

Normal Operation
The message center functionality is controlled through the message center switches, which are hardwired to the instrument cluster (IC). The instrument cluster (IC) monitors the message center switch input by sending reference signals through circuits 143 (LB/YE) and 152 (LB/WH). The message center switch return signal is routed back to the instrument cluster (IC) through circuit 1411 (GY/OG).







This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Message center switch
- Instrument cluster (IC)

B1-B2:

B2-B4:

B4-B7: