Pinpoint Test N: DTC U0155:00

Remote Function Actuator (RFA) Module

Pinpoint Test N: DTC U0155:00

Normal Operation
- DTC U0155:00 (Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information) - sets in the Remote Function Actuator (RFA) module if data messages received from the Instrument Panel Cluster (IPC) are missing. For a complete list of all network messages, refer to Module Communications Network Testing and Inspection.

This pinpoint test is intended to diagnose the following:

- Communication network concern
- RFA module
- IPC

PINPOINT TEST N: DTC U0155:00

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N1 VERIFY CUSTOMER CONCERN

- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to N2.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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N2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the IPC pass the network test?

Yes
GO to N3.

No
REFER to Module Communications Network Testing and Inspection, The IPC Does Not Respond To The Scan Tool.

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N3 RETRIEVE THE RECORDED DTCs FROM THE RFA MODULE SELF-TEST

- Check for recorded RFA module DTCs from the self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
For DTC U3003:16, GO to Pinpoint Test O. For DTC U3003:17, GO to Pinpoint Test P. Pinpoint Test O: DTC U3003:16 Pinpoint Test P: DTC U3003:17

No
GO to N4.

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N4 RECHECK THE RFA MODULE DTCs

NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during Programmable Module Installation (PMI) or the PMI may not have been carried out.

- Clear the DTCs. Repeat the RFA module self-test.
- Is DTC U0155:00 still present?

Yes
GO to N5.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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N5 CHECK FOR DTC U0155:00 OR DTC U0155 SET IN OTHER MODULES

- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test .
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0155:00 or DTC U0155 set in any other module?

Yes
INSTALL a new IPC. REFER to Instrumentation, Message Center, and Warning Chimes Service and Repair.

No
INSTALL a new RFA module. REFER to Remote Function Actuator (RFA) Module Service and Repair. TEST the system for normal operation.

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