Pinpoint Test A: DTC B1317

Generic Electronic Module (GEM)

Pinpoint Tests

Pinpoint Test A: DTC B1317

Refer to Wiring Diagram Set 13, Power Distribution for schematic and connector information. Diagrams By Number

Normal Operation

The Generic Electronic Module (GEM) monitors the voltage from the battery to determine if it is above or below specific thresholds and sets DTC B1317 in continuous memory if the GEM detects high battery voltage above 16.5 volts on circuit 15-DK20.

- DTC B1317 (Battery Voltage High) - a continuous memory DTC that sets when the GEM detects battery voltage above 16.5 volts on circuit 15-DK20.

This pinpoint test is intended to diagnose the following:

- Charging system concern
- GEM



PINPOINT TEST A: DTC B1317

NOTE: DTC B1317 may be stored in the module memory due to previous battery charging or vehicle jump starting events.

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A1 CHECK FOR DTC B1317 OR P0563:00 SET IN OTHER MODULES


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: (All Modules) Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC B1317 or DTC P0563:00 (PCM) set in more than one module?

Yes
REFER to Charging System to diagnose an overcharging condition.

No
GO to A2.

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A2 CHECK THE BATTERY VOLTAGE


- Turn off all interior/exterior lights and accessories.
- Start and run the engine at approximately 2,000 rpm for 3 minutes while monitoring the battery voltage.
- Does the battery voltage rise to 16.5 volts or higher?

Yes
REFER to Charging System to diagnose an overcharging condition.

No
GO to A3.

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A3 RECHECK FOR DTC B1317


- Turn the engine off.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: GEM Self-Test.
- Clear the continuous memory DTCs.
- Carry out the GEM self-test.
- Is DTC B1317 present?

Yes
INSTALL a new GEM. REFER to Generic Electronic Module (GEM) Service and Repair. TEST the system for normal operation.

No
The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

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