Pinpoint Test BD: While In Dual-Play Mode With Both Audio Sources Set To The SYNC System, One Audio Source Is Inoperative - Veh

Information and Entertainment System

Pinpoint Tests

Pinpoint Test BD: While In Dual-Play Mode With Both Audio Sources Set To The SYNC System, One Audio Source Is Inoperative - Vehicles With The Family Entertainment System

Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number

Normal Operation

The Rear Entertainment Module (RETM) allows for dual-play mode to include separate SYNC system audio sources for each DVD player. To do this, the Accessory Protocol Interface Module (APIM) transmits SYNC system audio signals over an additional set of circuits.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- APIM
- RETM



PINPOINT TEST BD: WHILE IN DUAL-PLAY MODE WITH BOTH AUDIO SOURCES SET TO THE SYNC 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.

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BD1 CHECK THE AUDIO CIRCUITS TO THE RETM FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: RETM C2949b.
- Disconnect: APIM C3342.
- Ignition ON.
- Measure the voltage between the RETM, 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 BD2.

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BD2 CHECK THE AUDIO CIRCUITS TO THE RETM FOR AN OPEN OR SHORT TO GROUND


- Ignition OFF.
- Measure the resistance between the RETM, harness side and the APIM, harness side; and between the RETM, harness side and ground as follows:









- Is the resistance less than 5 ohms between the RETM and the APIM, and greater than 10,000 ohms between the RETM and ground?

Yes
GO to BD3.

No
REPAIR the circuit in question. TEST the system for normal operation.

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BD3 CHECK FOR CORRECT APIM OPERATION


- Connect: RETM C2949b.
- Disconnect the APIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM connector and make sure it seats correctly.
- Wait 2 minutes for the APIM to re-initialize.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new APIM. REFER to Accessory Protocol Interface Module (APIM) 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.

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BD4 CHECK FOR CORRECT RETM OPERATION


- Ignition OFF.
- Disconnect all the RETM connectors
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all RETM connectors and make sure they seat correctly.
- Is the concern still present?

Yes
INSTALL a new RETM. REFER to Rear Entertainment Module (RETM) 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.

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