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Pinpoint Test G: DTC B1299




Parking Aid

Pinpoint Tests

Pinpoint Test G: DTC B1299

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

Normal Operation - Rear Parking Aid System

The PAM supplies voltage and ground signals to the rear parking aid sensors. The PAM receives a signal from the rear parking aid sensors and determines the distance of an object from the rear of the vehicle. If the PAM detects the sensors supply voltage circuit is short to ground or to the sensors (-) circuit on any of the rear parking aid sensors the PAM will set a DTC.

Normal Operation - Front Parking Aid System (Navigator)

The PAM supplies voltage and ground signals to the front parking aid sensors. The PAM receives a signal from the front parking aid sensors and determines the distance of an object from the front of the vehicle. If the PAM detects the sensors supply voltage circuit is short to ground or to the sensors (-) circuit on any of the rear parking aid sensors the PAM will set a DTC.

- DTC B1299 (Power Supply Sensor Circuit Short To Ground) - sets when the sensor power supply circuit is shorted to ground or to the sensor (-) circuit.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Parking aid sensor(s)
- Parking aid bumper harness
- PAM

PINPOINT TEST G: DTC B1299

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

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G1 CHECK THE BUMPER WIRING HARNESS


- Inspect the bumper wiring harness for opens, shorts, grounds, or corrosion.
- Is the bumper wiring harness OK?

Yes
For the rear parking aid system, GO to G2.

For the front parking aid system, GO to G6.

No
REPAIR or INSTALL a new bumper wiring harness. CLEAR the DTCs. REPEAT the self-test.

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G2 CHECK THE REAR LH OUTER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C4009.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G3.

No
INSTALL a new rear LH outer parking aid sensor. REFER to Parking Aid Sensor - Rear Parking Aid Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

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G3 CHECK THE REAR RH OUTER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C4011.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G4.

No
INSTALL a new rear RH outer parking aid sensor. REFER to Parking Aid Sensor - Rear Parking Aid Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

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G4 CHECK THE REAR LH INNER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C4010.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G5.

No
INSTALL a new rear LH inner parking aid sensor. REFER to Parking Aid Sensor - Rear Parking Aid Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

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G5 CHECK THE REAR RH INNER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C4012.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G10.

No
INSTALL a new rear RH inner parking aid sensor. REFER to Parking Aid Sensor - Rear Parking Aid Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

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G6 CHECK THE FRONT LH OUTER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C1428.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G7.

No
INSTALL a new front LH outer parking aid sensor. REFER to Parking Aid Sensor - Front Parking Aid Sensor - Front. CLEAR the DTCs. REPEAT the self-test.

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G7 CHECK THE FRONT RH OUTER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C1431.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G8.

No
INSTALL a new front RH outer parking aid sensor. REFER to Parking Aid Sensor - Front Parking Aid Sensor - Front. CLEAR the DTCs. REPEAT the self-test.

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G8 CHECK THE FRONT LH INNER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C1429.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G9.

No
INSTALL a new front LH inner parking aid sensor. REFER to Parking Aid Sensor - Front Parking Aid Sensor - Front. CLEAR the DTCs. REPEAT the self-test.

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G9 CHECK THE FRONT RH INNER SENSOR FOR AN INTERNAL SHORT


- Ignition OFF.
- Disconnect: Parking Aid Sensor C1430.
- Ignition ON.
- Clear the DTCs. Repeat the on-demand self-test.
- Is DTC B1299 still present?

Yes
GO to G12.

No
INSTALL a new front RH inner parking aid sensor. REFER to Parking Aid Sensor - Front Parking Aid Sensor - Front. CLEAR the DTCs. REPEAT the self-test.

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G10 CHECK THE REAR PARKING AID SENSORS VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND


- Ignition OFF.
- Disconnect: PAM C4014A (Navigator).
- Disconnect: PAM C4226 (Expedition).
- Measure the resistance between the PAM C4014A-9 or C4226-9, circuit LMP07 (BU/WH), harness side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to G11.

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

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G11 CHECK THE REAR PARKING AID SENSORS VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO THE REAR PARKING AID SENSORS GROUND CIRCUIT


- Ignition OFF.
- Measure the resistance between the PAM C4014A-9 or C4226-9, circuit LMP07 (BU/WH), harness side and the PAM C4014A-12 or C4226-12, circuit RMP07 (GN/WH).




- Is the resistance greater than 10,000 ohms?

Yes
GO to G14.

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

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G12 CHECK THE FRONT PARKING AID SENSORS VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND


- Ignition OFF.
- Disconnect: PAM C4014B.
- Measure the resistance between the PAM C4014B-1, circuit LMP06 (VT/GY), harness side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to G13.

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

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G13 CHECK THE FRONT PARKING AID SENSORS VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND TO THE FRONT PARKING AID SENSORS GROUND CIRCUIT


- Ignition OFF.
- Measure the resistance between the PAM C4014B-10, circuit RMP06 (YE/OG), harness side and the PAM C4014B-1, circuit LMP06 (VT/GY).




- Is the resistance greater than 10,000 ohms?

Yes
GO to G14.

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

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G14 CHECK FOR CORRECT PAM OPERATION


- Connect: All Disconnected Connectors.
- Disconnect all the PAM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PAM connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?

Yes
INSTALL a new PAM. REFER to Parking Aid Module (PAM) Service and Repair. 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. CLEAR the DTCs. REPEAT the self-test.

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