Pinpoint Test AB: DTC U0163:00

Climate Control System

Pinpoint Test AB: DTC U0163:00

Normal Operation

- DTC U0163:00 (Lost Communication With navigation Control Module: No Sub-Type Information)- sets in continuous memory in the HVAC module if data messages received from the Accessory Protocol Interface Module (APIM) over the Medium Speed Controller Area Network (MS-CAN) are missing for 5 seconds or more. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- APIM (Accessory Protocol Interface Module)

- HVAC module

PINPOINT TEST AB : DTC U0163:00

AB1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify there is an observable symptom present.

Is an observable symptom present?

Yes
GO to AB2.
No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

AB2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Network Test.

- Carry out the network test.

Does the APIM (Accessory Protocol Interface Module) pass the network test?

Yes
GO to AB3.
No
REFER to Information Bus.

AB3 RETRIEVE THE RECORDED DTCs FROM THE APIM (Accessory Protocol Interface Module) SELF-TEST

- Check for recorded DTCs from the APIM (Accessory Protocol Interface Module) self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
REFER to Accessories and Optional Equipment.
No
GO to AB4.

AB4 RETRIEVE THE RECORDED DTCs FROM THE HVAC MODULE SELF-TEST

- Check for recorded DTCs from the HVAC module self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
GO to Pinpoint Test H. Pinpoint Test H: DTC U3003:16 Or U3003:17
No
GO to AB5.

AB5 RECHECK THE HVAC MODULE DTCs
NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the PMI (Programmable Module Installation) may not have been carried out.

- Clear the DTCs.

- Wait 10 seconds.

- Repeat the HVAC module self-test.

Is DTC U0163:00 still present?

Yes
INSTALL a new APIM (Accessory Protocol Interface Module). CLEAR the DTCs. REPEAT the HVAC module self-test. If HVAC DTC U0163:00 returns, INSTALL a new HVAC module. TEST the system for normal operation.
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.