Pinpoint Tests BB: DTC U2472
Instrumentation, Message Center and Warning Chimes
Pinpoint Test BB: DTC U2472
Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information. Diagrams By Number
Normal Operation
With the ignition switch in the START or RUN position, the Instrument Cluster (IC) receives voltage from the Smart Junction Box (SJB) through circuit CBP29 (WH/VT). With the ignition switch in the OFF position, the IC receives its keep-alive voltage from the SJB through circuit SBP26 (YE/RD). The IC also monitors the ignition switch position data received from the SJB over the Medium Speed Controller Area Network (MS-CAN) communication bus.
- DTC U2472 (Unexpected Ignition State) - a continuous memory DTC that sets in the IC when the cluster detects a discrepancy between the hardwired voltage input and the messaged ignition state inputs from the SJB. The SJB messaged input indicates RUN while the hardwired input indicates RUN/START for more than 5 seconds.
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- IC
PINPOINT TEST BB: DTC U2472
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
BB1-BB2:
