Pinpoint Test A: The Instrument Cluster (IC) Is Inoperative

Instrumentation and Warning Chimes

Pinpoint Tests

Pinpoint Test A: The Instrument Cluster (IC) Is Inoperative

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

Normal Operation

The Instrument Cluster (IC) receives START/RUN and B+ keep alive voltage from the Smart Junction Box (SJB). The IC is grounded through 2 separate circuits.

This pinpoint test is intended to diagnose the following:

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

PINPOINT TEST A: THE IC 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, Mounting and Cables Battery Disconnect.

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A1 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST

- Check for recorded DTCs from the IC self-test.
- Is DTC U2472 recorded?

Yes
GO to Pinpoint Test AP. Pinpoint Test AP: DTC U2472

No
GO to A2.

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A2 CHECK THE IC B+ VOLTAGE SUPPLY

- Ignition OFF.
- Disconnect: IC C220b.
- Measure the voltage between the IC C220b-10, circuit SBP33 (RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A3.

No
VERIFY the SJB fuse 33 (5A) is OK. If OK, REPAIR circuit SBP33 (RD) for an open. TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number

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A3 CHECK THE IC GROUND CIRCUITS FOR AN OPEN

- Ignition OFF.
- Disconnect: IC C220a.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the IC, harness side and ground as follows:









- Are the resistances less than 5 ohms?

Yes
GO to A5.

No
REPAIR the circuit in question for an open. TEST the system for normal operation.
A4 CHECK FOR CORRECT IC OPERATION

- Disconnect all the IC connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins

- Connect all the IC connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). 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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