Pinpoint Test G: The Video System Does Not Operate Correctly
Information and Entertainment System
Pinpoint Tests
Pinpoint Test G: The Video System Does Not Operate Correctly
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
The Rear Entertainment Module (RETM) routes audio signals to the Audio Control Module (ACM). In single-play mode, the ACM plays the DVD audio on all speakers. In dual-play mode, the audio to the rear speakers is muted and the RETM continues to control the rear audio source to the headphones.
If the vehicle is equipped with satellite audio and/or the SYNC system, the audio signals from these sources are routed through the RETM to the ACM. This allows for single-play and dual-play to include these audio sources.
- DTC U0184 (Lost Communication With Radio (ACM)) - sets when the RETM is missing status messages from the ACM for greater than 5 seconds with the key in RUN. This may cause the RETM to be inoperative.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- RETM
- ACM
PINPOINT TEST G: THE VIDEO SYSTEM DOES NOT OPERATE CORRECTLY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Before diagnosing the RETM, make sure a known good DVD is installed.
-------------------------------------------------
G1 IDENTIFY THE SYMPTOM
- Operate the audio system in DVD single-play mode and observe the DVD video.
- Does the DVD video operate correctly?
Yes
If the vehicle is equipped with satellite audio or the SYNC system, GO to G3.
Otherwise, GO to G4.
No
GO to G2.
-------------------------------------------------
G2 CHECK THE OPERATION OF THE DVD VIDEO
- With the RETM still on, press the VIDEO button once or twice while observing the DVD video.
- Does the DVD video display?
Yes
The system is operating correctly at this time. The concern was caused by an incorrect system setting. INFORM the customer that pressing the power button or the VIDEO button while a DVD is playing can cause the display to go blank.
No
GO to G6.
-------------------------------------------------
G3 CHECK THE RETM AUDIO PASS-THROUGH
- Operate the audio system in satellite audio or SYNC mode.
- Does the satellite audio (or SYNC) audio operate correctly?
Yes
GO to G6.
No
GO to G4.
-------------------------------------------------
G4 CHECK THE AUDIO CIRCUITS TO THE ACM FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM C240c.
- Disconnect: RETM C9029.
- Ignition ON.
- Measure the voltage between the ACM, harness side and ground as follows:
- Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to G5.
-------------------------------------------------
G5 CHECK THE AUDIO CIRCUITS TO THE ACM FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the ACM, harness side and the RETM, harness side; and between the ACM, harness side and ground as follows:
- Are the resistances less than 5 ohms between the ACM and the RETM, and greater than 10,000 ohms between the ACM and ground?
Yes
GO to G6.
No
REPAIR the circuit in question. TEST the system for normal operation.
-------------------------------------------------
G6 CHECK FOR CORRECT RETM OPERATION
- Connect: All Disconnected Connectors.
- Disconnect the RETM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the RETM connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
Yes
INSTALL a new RETM. REFER to Rear Entertainment Module (RETM) Service and Repair. TEST the system for normal operation. If the concern is still present, GO to G7.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
-------------------------------------------------
G7 CHECK FOR CORRECT ACM OPERATION
- Disconnect all the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
Yes
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 concern may have been caused by a loose or corroded connector.
-------------------------------------------------