Pinpoint Test AN: DTC U3003:16 (Rear Entertainment Module (RETM))
Information and Entertainment System
Pinpoint Tests
Pinpoint Test AN: DTC U3003:16 (Rear Entertainment Module (RETM))
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
- DTC U3003:16 (Battery Voltage: Circuit Voltage Below Threshold) - set by the Rear Entertainment Module (RETM) when the supply voltage falls below 10 volts for at least 10 seconds during normal operation.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- High circuit resistance
- RETM
PINPOINT TEST AN: DTC U3003:16 (RETM)
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery, Mounting and Cables Battery Disconnect.
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AN1 RECHECK THE RETM DTCs
- Ignition ON.
- Clear the RETM DTCs.
- Wait at least 15 seconds.
- Repeat the RETM self-test.
- Is DTC U3003:16 still present?
Yes
GO to AN2.
No
The system is operating correctly at this time. The DTC may have been set due to a previous low battery voltage condition.
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AN2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM
- Retrieve the continuous DTCs from all modules.
- Is DTC P0620, P0622, P0625, or P065B set in the PCM?
Yes
REFER to Charging System Testing and Inspection.
No
GO to AN3.
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AN3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
- Check the battery condition and verify that the battery is fully charged. Refer to Battery, Mounting and Cables Testing and Inspection.
- Is the battery OK and fully charged?
Yes
GO to AN4.
No
REFER to Battery, Mounting and Cables Testing and Inspection.
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AN4 CHECK THE RETM VOLTAGE SUPPLY
- Ignition OFF.
- Measure and record the voltage at the battery.
- Disconnect: RETM C2949a.
- Ignition ON.
- Measure the voltage between the RETM C2949a-13, circuit SBP14 (BU/RD), harness side and ground.
- Is the voltage at the RETM within 0.2 volt of the recorded battery voltage?
Yes
GO to AN5.
No
REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.
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AN5 CHECK THE RETM GROUND CIRCUITS
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the RETM C2949a-1, circuit GD114 (BK/BU), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to AN6.
No
REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.
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AN6 CHECK FOR CORRECT RETM OPERATION
- Ignition OFF.
- Connect: Negative Battery Cable.
- 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) 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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