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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests


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

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

The IPC 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 fuse 36 (5A) has failed.

This pinpoint test is intended to diagnose the following:

- Fuse
- Wiring, terminals or connectors
- IPC



PINPOINT TEST A: THE IPC 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 will result in false resistance readings. Refer to Battery.

-------------------------------------------------
A1 RETRIEVE THE DTCs FROM THE IPC SELF-TEST


- Check for recorded DTCs from the IPC self-test.
- Is DTC U300A:94 present?

Yes
GO to Pinpoint Test AZ. Pinpoint Tests AZ: DTC U300A:94

No
GO to A2.

-------------------------------------------------
A2 CHECK THE IPC VOLTAGE SUPPLY WITH KEY OFF


- Ignition OFF.
- Disconnect: IPC C220.
- Measure the voltage between the IPC 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 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 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 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 OPERATION


- Disconnect the IPC connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IPC 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. REFER to Instrument Panel Cluster (IPC) Service and Repair. 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.

-------------------------------------------------