Pinpoint Test V: DTC B1318 (Front Controls Interface Module (FCIM))

Information and Entertainment System

Pinpoint Tests

Pinpoint Test V: DTC B1318 (Front Controls Interface Module (FCIM))

Refer to Wiring Diagram Set 130, Audio System for schematic and connector information. Diagrams By Number

Normal Operation
- DTC B1318 (Battery Voltage Low) - set by the Front Controls Interface Module (FCIM) as a continuous or on-demand DTC if supply voltage falls below 10 volts for greater than 10 seconds during normal operation, or for greater than 250 milliseconds during the self-test.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- High circuit resistance
- FCIM


PINPOINT TEST V: DTC B1318 (FCIM)

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

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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V1 RECHECK THE FCIM DTCs


- Clear the FCIM DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Repeat the FCIM self-test.
- Is DTC B1318 still present?

Yes
GO to V2.

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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V2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM


- Retrieve the continuous memory DTCs from all modules.
- Is DTC P0620, P0622, P0625, P0626 or P065B set in the PCM?

Yes
REFER to Charging System Testing and Inspection.

No
GO to V3.

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V3 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 V4.

No
REFER to Battery, Mounting and Cables Testing and Inspection.

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V4 CHECK THE FCIM VOLTAGE SUPPLY


- Ignition OFF.
- Measure and record the voltage at the battery.
- Disconnect: FCIM.
- Ignition ON.
- Measure the voltage between the FCIM C2402-1, circuit SBP39 (WH/RD), harness side and ground.




- Is the voltage within 0.2 volt of the recorded battery voltage?

Yes
GO to V5.

No
REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.

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V5 CHECK THE FCIM GROUND CIRCUIT FOR CONTINUITY


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the FCIM C2402-2, circuit GD134 (BK/VT), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
GO to V6.

No
REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.

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V6 CHECK FOR CORRECT FCIM OPERATION


- Connect: Negative Battery Cable.
- Disconnect all the FCIM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the FCIM 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 FCIM. REFER to Front Controls Interface Module (FCIM) Front Controls Interface Module (FCIM). 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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