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B1170




Power Running Board (PRB)

Pinpoint Test E: DTCs B1162, B1163, B1164 and B1170

Normal Operation

The Power Running Board (PRB) module provides a regulated 10-volt power supply to the Hall-effect sensor (internal to the PRB (Power Running Board) motor) through circuit CPR47 (GY/BN). The Hall-effect ground is provided by the PRB (Power Running Board) module through circuit RPR47 (BU/GN). The PRB (Power Running Board) module monitors the PRB (Power Running Board) Hall-effect signal through circuit VPR43 (GY/BU) (LH) or VPR46 (GY) (RH). If the PRB (Power Running Board) module does not receive any signal from the Hall-effect sensor during operation, the PRB (Power Running Board) will stop.





This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- PRB (Power Running Board) module

- LH or RH PRB (Power Running Board) motor assembly

PINPOINT TEST E : DTCs B1162, B1163, B1164 AND B1170

E1 CHECK FOR CONTINUITY BETWEEN LH AND RH PRB (Power Running Board) MOTORS ON THE HALL-EFFECT SENSOR POWER AND GROUND CIRCUITS

- Disconnect: PRB (Power Running Board) LH Motor C3185.

- Disconnect: PRB (Power Running Board) RH Motor C3186.

- Ignition OFF.

- Measure the resistance between LH PRB (Power Running Board) motor C3185, harness side and RH PRB (Power Running Board) motor C3186, harness side using the following chart:

LH PRB (Power Running Board) Motor Circuit RH PRB (Power Running Board) Motor C3185-4 CPR47 (GY/BN) C3186-4 C3185-6 RPR47 (BU/GN) C3186-6








Is the resistance less than 5 ohms?

Yes
GO to E2.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

E2 CHECK THE HALL-EFFECT SENSOR POWER AND GROUND

- Ignition ON.

- Measure the voltage between RH PRB (Power Running Board) motor C3186-4, circuit CPR47 (GY/BN), harness side and C3186-6, circuit RPR47 (BU/GN), harness side.






- Open RH door.

- Voltage signal will only be present for less than one second.

Is the voltage between 7 and 10.5 volts?

Yes
GO to E7.
No
If the voltage was less than 7 volts, GO to E3.

If the voltage was greater than 10.5 volts, GO to E6.

E3 CHECK HALL-EFFECT SENSOR POWER CIRCUIT FOR VOLTAGE

- Measure the voltage between RH PRB (Power Running Board) motor C3186-4, circuit CPR47 (GY/BN), harness side and ground.






- Open RH door.

- Voltage signal will only be present for less than one second.

Is the voltage between 7 and 10.5 volts?

Yes
GO to E5.
No
GO to E4.

E4 CHECK HALL-EFFECT SENSOR POWER CIRCUIT FOR AN OPEN OR SHORT TO GROUND

- Ignition OFF.

- Disconnect: PRB (Power Running Board) Module C3313B.

- Measure the resistance between RH PRB (Power Running Board) motor C3186-4, circuit CPR47 (GY/BN), harness side and PRB (Power Running Board) module C3313B-5, circuit CPR47 (GY/BN), harness side; and between RH PRB (Power Running Board) motor C3186-4, circuit CPR47 (GY/BN), harness side and ground.






Is the resistance less than 5 ohms between the PRB (Power Running Board) motor and the PRB (Power Running Board) module; and greater than 10,000 ohms between the PRB (Power Running Board) motor and ground?

Yes
GO to E9.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

E5 CHECK THE HALL-EFFECT SENSOR GROUND CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: PRB (Power Running Board) Module C3313B.

- Measure the resistance between RH PRB (Power Running Board) motor C3186-6, circuit RPR47 (BU/GN), harness side and PRB (Power Running Board) module C3313B-14, circuit RPR47 (BU/GN), harness side.






Is the resistance less than 5 ohms?

Yes
GO to E9.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

E6 CHECK THE HALL-EFFECT SENSOR POWER CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: PRB (Power Running Board) Module C3313B.

- Ignition ON.

- Measure the voltage between RH PRB (Power Running Board) motor C3186-4, circuit CPR47 (GY/BN), harness side and ground.






Is any voltage present?

Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
No
GO to E9.

E7 CHECK THE HALL-EFFECT SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: PRB (Power Running Board) Module C3313B.

- Ignition ON.

- For DTC B1163, measure the voltage between LH PRB (Power Running Board) motor C3185-5, circuit VPR43 (GY/BU), harness side and ground.






- For DTC B1170, measure the voltage between RH PRB (Power Running Board) motor C3186-5, circuit VPR46 (GY), harness side and ground.

Is any voltage present?

Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
No
GO to E8.

E8 CHECK THE HALL-EFFECT SENSOR SIGNAL CIRCUIT FOR AN OPEN OR SHORT TO GROUND

- Ignition OFF.

- For DTC B1163, measure the resistance between LH PRB (Power Running Board) motor C3185-5, circuit VPR43 (GY/BU), harness side and PRB (Power Running Board) module C3313B-9, circuit VPR43 (GY/BU), harness side; and between LH PRB (Power Running Board) motor C3185-5, circuit VPR43 (GY/BU), harness side and ground.






- For DTC B1170, measure the resistance between RH PRB (Power Running Board) motor C3186-5, circuit VPR46 (GY), harness side and PRB (Power Running Board) module C3313B-10, circuit VPR46 (GY), harness side; and between RH PRB (Power Running Board) motor C3186-5, circuit VPR46 (GY), harness side and ground.






Is the resistance less than 5 ohms between the PRB (Power Running Board) motor and PRB (Power Running Board) module; and greater than 10,000
ohms between the PRB (Power Running Board) motor and ground?

Yes
GO to E10.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

E9 CHECK THE PRB (Power Running Board) MODULE FOR CORRECT OPERATION

- Connect: PRB (Power Running Board) LH Motor C3185.

- Connect: PRB (Power Running Board) RH Motor C3186.

- Disconnect all PRB (Power Running Board) module connectors.

- Check for:
- corrosion.

- pushed-out pins.


- Connect all PRB (Power Running Board) module 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 PRB (Power Running Board) module. REFER to Power Running Board (PRB) Module . CLEAR the DTCs. REPEAT the self-test.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

E10 CHECK THE PRB (Power Running Board) MODULE FOR CORRECT OPERATION

- Connect: PRB (Power Running Board) LH Motor C3185.

- Connect: PRB (Power Running Board) RH Motor C3186.

- Disconnect all PRB (Power Running Board) module connectors.

- Check for:
- corrosion.

- pushed-out pins.


- Connect all PRB (Power Running Board) module connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
GO to E11.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

E11 CHECK THE PRB (Power Running Board) FOR FOREIGN MATERIAL

- NOTE: If the system has false bounce-back, stops in mid-travel, is noisy or will not deploy or stow completely, extend the PRB (Power Running Board) and check to see if any foreign material is caught in the PRB (Power Running Board) hinge points, step area or door sill. If foreign material is found, clean the PRB (Power Running Board) hinge points, step area and door sill with a high-pressure washer. If the system operates correctly after cleaning, refer the customer to the Owner's Literature for correct cleaning instructions.

Check the PRB (Power Running Board) hinge points, step area and door sill of the PRBs (Power Running Boards) for foreign material or blockage. If any foreign material or blockage is found, remove it, and if necessary, set the PRB (Power Running Board) system to the OUT mode and clean the PRB (Power Running Board) hinge points, step area and door sill with a high-pressure washer. Avoid direct spray to the motor.

- Set the PRB (Power Running Board) system to the AUTO (enabled) mode, where the boards automatically deploy when either door on the same side is opened, and retract when the door is closed.

- Open and close the LH front door. The LH PRB (Power Running Board) should deploy when the door is open, and retract when the door is closed.

- Open and close the RH front door. The RH PRB (Power Running Board) should deploy when the door is open, and retract when the door is closed.

Do the LH and RH PRBs (Power Running Boards) operate normally during all test steps?

Yes
The system is operating normally. The concern may have been caused by foreign material or blockage in the pivot areas or track guides. REFER the customer to the Owner's Literature for correct cleaning instructions.
No
INSTALL a new PRB (Power Running Board) motor. REFER to Power Running Board (PRB) Motor . CLEAR the DTCs. REPEAT the self-test.

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