Pinpoint Test C: The IPC Does Not Respond To The Scan Tool

Communications Network

Pinpoint Tests

Pinpoint Test C: The IPC Does Not Respond To The Scan Tool

Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number

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

Normal Operation

The Instrument Panel Cluster (IPC) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).

This pinpoint test is intended to diagnose the following:

- Fuse
- Wiring, terminals or connectors
- IPC

PINPOINT TEST C: THE IPC DOES NOT RESPOND TO THE SCAN TOOL

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 / Connect.

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C1 CHECK THE IPC VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

- Disconnect: C220 .
- Ignition ON.
- Measure the voltage between the IPC C220-6 circuit SBP11 (BU/RD or YE/RD), harness side and ground.




- Are the voltages greater than 10 volts?

Yes
GO to C2.

No
VERIFY the BCM fuse 11 (10A) is OK. If OK, REPAIR the circuit. If not OK, Refer to Wiring Diagrams to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool. Diagrams By Number

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C2 CHECK THE IPC GROUND CIRCUIT FOR AN OPEN

- Ignition OFF.
- Disconnect: Negative Battery Cable .
- Measure the resistance between the IPC C220-22, circuit GD184 (BK/GY or BK/YE), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
CONNECT the negative battery cable. GO to C3.

No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.

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C3 CHECK THE HS-CAN CIRCUITS BETWEEN THE IPC AND THE DLC FOR AN OPEN

- Measure the resistance between the IPC C220-15, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.




- Measure the resistance between the IPC C220-14 , circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Are the resistances less than 5 ohms?

Yes
GO to C4.

No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.

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C4 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 Instrumentation, Message Center, and Warning Chimes Instrument Panel Cluster (IPC). CLEAR the DTCs. REPEAT the network test with the scan tool.

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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