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 in the START or RUN mode, the Instrument Panel Cluster (IPC) receives voltage from the Smart Junction Box (SJB) through circuit CBP29 (WH/VT). With the ignition in the OFF mode, the IPC receives its keep-alive voltage from the SJB through circuit SBP26 (YE/RD). The IPC grounding is through circuit GD114 (BK/BU). The IPC sets DTC U300A:62 in continuous memory and on-demand if the RUN/START input, circuit CBP29 (WH/VT), is open or if the SJB fuse 29 (5A) has failed.

This pinpoint test is intended to diagnose the following:

- Fuse(s)
- Wiring, terminals or connectors
- IPC



PINPOINT TEST A: THE IPC IS INOPERATIVE

NOTICE: 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.

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


- Check for recorded IPC DTCs from the continuous self-test.
- Is DTC U300A:62 recorded?

Yes
Go To Pinpoint Test BE. Pinpoint Tests BE: DTC U300A:62 Or U300A:64

No
GO to A2.

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A2 CHECK THE IPC B+ VOLTAGE SUPPLY


- Ignition OFF.
- Disconnect: IPC C220.
- Measure the voltage between the IPC C220-19, circuit SBP26 (YE/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A3.

No
VERIFY SJB fuse 26 (10A) is OK. If OK, REPAIR the circuit for an open. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. TEST the system for normal operation.

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A3 CHECK THE IPC GROUND CIRCUIT GD114 (BK/BU) FOR AN OPEN


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the IPC C220-9, circuit GD114 (BK/BU), 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.

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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 determine if the concern is still present.
- Is the concern still present?

Yes
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) 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.

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