Pinpoint Test X: DTC U0159:00

Information and Entertainment System

Pinpoint Tests

Pinpoint Test X: DTC U0159:00

Normal Operation

The Parking Aid Module (PAM) sends the volume cutback message to the Body Control Module (BCM) via the High Speed Controller Area Network (HS-CAN). The BCM gateways the message to the Audio Control Module (ACM) via the Medium Speed Controller Area Network (MS-CAN). When the PAM sounds the parking aid tone, the ACM reduces the speaker output so that the parking aid tone can be heard more clearly.

- DTC U0159:00 (Lost Communication With Parking Assist Control Module "A": No Sub Type Information) - set by the ACM when the volume cutback message is missing for greater than 5 seconds. When the message is missing, the ACM defaults to no volume cutback when the parking aid tone is sounding.

This pinpoint test is intended to diagnose the following:

- ACM
- PAM

PINPOINT TEST X: DTC U0159:00

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X1 VERIFY THE CUSTOMER CONCERN

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

Yes
GO to X2.

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.

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X2 CHECK THE COMMUNICATION NETWORK

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

Yes
GO to X3.

No
REFER to Module Communications Network Testing and Inspection.

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X3 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs

- Carry out the self-test for the following modules:
- ACM
- BCM
- Is DTC U3003:16 or DTC U3003:17 recorded in any module?

Yes
For the ACM, REFER to DTC Charts Information and Entertainment Systems - DTC Charts. For the BCM, REFER to Multifunction Electronic Modules Multifunction Electronic Modules.

No
GO to X4.

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X4 RECHECK THE ACM 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 PMI may not have been carried out.

- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Repeat the ACM self-test.
- Is DTC U0159:00 still present?

Yes
INSTALL a new PAM. REFER to Parking Aid Service and Repair. CLEAR the DTCs. REPEAT the ACM self-test. INSTALL a new ACM. REFER to Audio Control Module (ACM) Audio Control Module (ACM). 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.

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