Pinpoint Test B: DTC B1318

Parking Aid - Expedition

Pinpoint Tests

Pinpoint Test B: DTC B1318

Refer to Wiring Diagram Set 131, Parking Aid for schematic and connector information. Diagrams By Number

Normal Operation

- DTC B1318 (Battery Voltage Low) - set by the parking aid module ( PAM) as a continuous or on demand DTC when the supply voltage drops below 8 volts for 3 or more seconds during normal operation.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Charging system concern



PINPOINT TEST B: DTC B1318

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.

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B1 CHECK THE PAM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN


- Ignition OFF.
- Disconnect: PAM C4226.
- Ignition ON.
- Measure the voltage between the PAM C4226-18, circuit CBP35 (YE/GY), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to B2.

No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

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B2 CHECK THE PAM GROUND CIRCUIT


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the PAM C4226-6, circuit GD133 (BK), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
REFER to Charging System to diagnose the low battery voltage concern.

No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

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