Pinpoint Test A: DTC B1317

Generic Electronic Module (GEM)

Pinpoint Tests

Pinpoint Test A: DTC B1317

Normal Operation
- DTC B1317 (Battery Voltage High) - a continuous DTC that sets when the GEM detects battery voltage above 16.5 volts.

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 Testing and Inspection 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 Testing and Inspection 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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