Pinpoint Test BD: While In Dual-Play Mode With Both Audio Sources Set To The SYNC(R) System, One Audio Source Is Inoperative
Information and Entertainment System
Pinpoint Test BD: While In Dual-Play Mode With Both Audio Sources Set To The SYNC(R) System, One Audio Source Is Inoperative - Vehicles With The Family Entertainment System
Refer to Wiring Diagrams Set 130, Audio System/Navigation for schematic and connector information. Electrical Diagrams
Normal Operation
The Rear Entertainment Module (RETM) allows for dual-play mode to include separate SYNC(R) system audio sources for each DVD player. To do this, the Accessory Protocol Interface Module (APIM) transmits SYNC(R) system audio signals over an additional set of circuits.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- APIM (Accessory Protocol Interface Module)
- RETM (Rear Entertainment Module)
PINPOINT TEST BD : WHILE IN DUAL-PLAY MODE WITH BOTH AUDIO SOURCES SET TO THE SYNC(R) SYSTEM, ONE AUDIO SOURCE IS INOPERATIVE - VEHICLES WITH THE FAMILY ENTERTAINMENT SYSTEM
NOTICE: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
BD1 CHECK THE AUDIO CIRCUITS TO THE RETM (Rear Entertainment Module) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: RETM (Rear Entertainment Module) C2949B.
- Disconnect: APIM (Accessory Protocol Interface Module) C3342.
- Ignition ON.
- Measure the voltage between the RETM (Rear Entertainment Module), harness side and ground as follows:
Positive Meter Lead Negative Meter Lead Circuit C2949B-26 Ground VME66 (VT) C2949B-13 Ground RME66 (GN/WH) C2949B-12 Ground VME67 (VT/GY) C2949B-25 Ground RME67 (BN/WH)
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to BD2.
BD2 CHECK THE AUDIO CIRCUITS TO THE RETM (Rear Entertainment Module) FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the RETM (Rear Entertainment Module), harness side and the APIM (Accessory Protocol Interface Module), harness side; and between the RETM (Rear Entertainment Module), harness side and ground as follows:
Positive Meter Lead Negative Meter Lead Circuit C2949B-26 C3342-40, then ground VME66 (VT) C2949B-13 C3342-41, then ground RME66 (GN/WH) C2949B-12 C3342-42, then ground VME67 (VT/GY) C2949B-25 C3342-43, then ground RME67 (BN/WH)
Is the resistance less than 5 ohms between the RETM (Rear Entertainment Module) and the APIM (Accessory Protocol Interface Module), and greater than 10,000 ohms between the RETM (Rear Entertainment Module) and ground?
Yes
GO to BD3.
No
REPAIR the circuit in question. TEST the system for normal operation.
BD3 CHECK FOR CORRECT APIM (Accessory Protocol Interface Module) OPERATION
- Connect: RETM (Rear Entertainment Module) C2949B.
- Disconnect the APIM (Accessory Protocol Interface Module) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM (Accessory Protocol Interface Module) connector and make sure it seats correctly.
- Wait 2 minutes for the APIM (Accessory Protocol Interface Module) to re-initialize.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new APIM (Accessory Protocol Interface Module). REFER to Accessory Protocol Interface Module (APIM) . TEST the system for normal operation. If the concern is still present, GO to BD4.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
BD4 CHECK FOR CORRECT RETM (Rear Entertainment Module) OPERATION
- Ignition OFF.
- Disconnect all the RETM (Rear Entertainment Module) connectors
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all RETM (Rear Entertainment Module) connectors and make sure they seat correctly.
Is the concern still present?
Yes
INSTALL a new RETM (Rear Entertainment Module). REFER to Rear Entertainment Module (RETM) . 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.