Diesel Data: Automotive Repair

Pinpoint Test G: The Battery Saver Does Not Deactivate After Time-out




Interior Lighting

Pinpoint Tests

Pinpoint Test G: The Battery Saver Does Not Deactivate After Time-out

Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number

Normal Operation

The Smart Junction Box (SJB) provides a battery saver function. The battery saver function provides automatic shutoff of the interior lamps (courtesy lamp, demand lamp and luggage compartment lamp) after a predetermined amount of time has elapsed in order to save battery power.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals, or connectors
- SJB


PINPOINT TEST G: THE BATTERY SAVER DOES NOT DEACTIVATE AFTER TIME-OUT

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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G1 CHECK THE SJB IGNITION SWITCH PID


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB ignition switch PIDs (IGN_O_ECU, IGN_A_ECU, IGN_R_ECU and IGN_S_ECU) while rotating the ignition switch through all positions.
- Does the ignition switch PID agree with the ignition switch positions?

Yes
GO to G2.

No
REFER to Steering Column Switches Testing and Inspection.

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G2 CHECK THE DEMAND LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: SJB C2280d.
- Ignition ON.
- Turn any demand lamp on.
- Does the demand lamp turn on?

Yes
REPAIR circuit CLN09 (YE/GN) for a short to voltage. TEST the system for normal operation.

No
GO to G3.

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G3 CHECK FOR CORRECT SJB OPERATION


- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. REFER to Multifunction Electronic Modules Service and Repair. 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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