Pinpoint Test A: The Instrument Panel Cluster (IPC) Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Test A: The Instrument Panel Cluster (IPC) Is Inoperative

Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information [1][2]Diagrams By Number.

Normal Operation

With the ignition switch in the START or RUN position, the Instrument Panel Cluster (IPC) receives voltage from the Smart Junction Box (SJB). With the ignition switch in the OFF position, the IPC (Instrument Panel Cluster) receives its keep-alive memory voltage from the SJB (Smart Junction Box).

The IPC (Instrument Panel Cluster) sets DTC U300A:94 in continuous memory and on-demand if the RUN/START input, circuit CBP36 (BU/BN) is open or if the SJB (Smart Junction Box) fuse 36 (5A) has failed.

This pinpoint test is intended to diagnose the following:

- Fuse

- Wiring, terminals or connectors

- IPC (Instrument Panel Cluster)

PINPOINT TEST A : THE IPC (Instrument Panel Cluster) IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Failure to disconnect the battery when instructed results in false resistance readings.

A1 RETRIEVE THE DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded DTCs from the IPC (Instrument Panel Cluster) self-test.

Is DTC U300A:94 present?

Yes
GO to Pinpoint Test BA Pinpoint Test BA: DTC U300A:94.

No
GO to A2.

A2 CHECK THE IPC (Instrument Panel Cluster) VOLTAGE SUPPLY WITH KEY OFF

- Ignition OFF.

- Disconnect: IPC (Instrument Panel Cluster) C220.

- Measure the voltage between the IPC (Instrument Panel Cluster) C220-1, circuit SBP26 (YE/RD), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to A3.

No
VERIFY the SJB (Smart Junction Box) fuse 26 (10A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short [1][2]Diagrams By Number. TEST the system for normal operation.

A3 CHECK THE GROUND CIRCUIT FOR AN OPEN

- Disconnect: Negative Battery Cable.

- Measure the resistance between the IPC (Instrument Panel Cluster) C220-8, circuit GD116 (BK/VT), harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to A4.

No
REPAIR the circuit. TEST the system for normal operation.

A4 CHECK FOR CORRECT IPC (Instrument Panel Cluster) OPERATION

- Disconnect the IPC (Instrument Panel Cluster) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the IPC (Instrument Panel Cluster) connector and make sure it seats correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.