Pinpoint Test K: DTC B1317

Fire Suppression System

Pinpoint Test K: DTC B1317

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

Normal Operation

The Fire Suppression System Module (FSSM) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1317 in continuous memory and on-demand if the FSSM detects high battery voltage above 18 volts on circuit 2319 (RD/YE) or above 17 volts if PCM and ABS messages are not received.

- DTC B1317 (Battery Voltage High) - a continuous memory or an on-demand DTC that sets when the FSSM detects battery voltage above 18 volts on circuit 2319 (RD/YE) or above 17 volts if PCM and ABS messages are not received.

This pinpoint test is intended to diagnose the following:

- Charging system concern
- FSSM



PINPOINT TEST K: 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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K1 CHECK FOR DTC B1317, B1676 OR P0563 SET IN OTHER MODULES


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: (All CMDTCs) Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC B1317, B1676 or P0563 (PCM) set in more than one module?

Yes
REFER to Charging System to diagnose an overcharging condition.

No
GO to K2.

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K2 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 15.5 volts or higher?

Yes
REFER to Charging System to diagnose an overcharging condition.

No
GO to K3.

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K3 RECHECK FOR DTC B1317


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

Yes
INSTALL a new FSSM. REFER to Fire Suppression System Module (FSSM) 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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