Pinpoint Test E: DTCs B1162, B1163, B1164 and B1170
Power Running Board (PRB)
Pinpoint Tests
Pinpoint Test E: DTCs B1162, B1163, B1164 and B1170
Refer to Wiring Diagram Set 109, Power Liftgate/Running Boards for schematic and connector information. Diagrams By Number
Normal Operation
The Power Running Board (PRB) module provides a regulated 10-volt power supply to the Hall-effect sensor (internal to the PRB motor) through circuit CPR47 (GY/BN). The Hall-effect ground is provided by the PRB module through circuit RPR47 (BU/GN). The PRB module monitors the PRB Hall-effect signal through circuit VPR43 (GY/BU) (LH) or VPR46 (GY/OG) (RH). If the PRB module does not receive any signal from the Hall-effect sensor during operation, the PRB will stop.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PRB module
- LH or RH PRB bracket assembly
PINPOINT TEST E: DTCs B1162, B1163, B1164 AND B1170
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E1 CHECK CONTINUITY BETWEEN LH AND RH PRB MOTORS ON THE HALL-EFFECT SENSOR POWER AND GROUND CIRCUITS
- Disconnect: PRB LH Motor C3185.
- Disconnect: PRB RH Motor C3186.
- Ignition OFF.
- Measure the resistance between LH PRB motor C3185, harness side and RH PRB motor C3186, harness side using the following chart:
- Is the resistance less than 5 ohms?
Yes
GO to E2.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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E2 CHECK THE HALL-EFFECT SENSOR POWER AND GROUND CIRCUITS
- Ignition ON.
- Measure the voltage between RH PRB motor C3186-2, circuit CPR47 (GY/BN), harness side and RH PRB motor 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.
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E3 CHECK THE HALL-EFFECT SENSOR POWER CIRCUIT FOR VOLTAGE
- Measure the voltage between RH PRB motor C3186-2, 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.
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E4 CHECK HALL-EFFECT SENSOR POWER CIRCUIT FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Disconnect: PRB Module C4322B.
- Measure the resistance between RH PRB motor C3186-2, circuit CPR47 (GY/BN), harness side and PRB module C4322B-5, circuit CPR47 (GY/BN), harness side and between RH PRB motor C3186-2, circuit CPR47 (GY/BN), harness side and ground.
- Is the resistance less than 5 ohms between the PRB motor and the PRB module; and greater than 10,000 ohms between the PRB motor and ground?
Yes
GO to E9.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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E5 CHECK THE HALL-EFFECT SENSOR GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: PRB Module C4322B.
- Measure the resistance between RH PRB motor C3186-6, circuit RPR47 (BU/GN), harness side and PRB module C4322B-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.
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E6 CHECK THE HALL-EFFECT SENSOR POWER CIRCUIT FOR SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: PRB Module C4322B.
- Ignition ON.
- Measure the voltage between RH PRB motor C3186-2, 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.
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E7 CHECK THE HALL-EFFECT SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: PRB Module C4322B.
- Ignition ON.
- For DTC B1163, measure the voltage between LH PRB motor C3185-3, circuit VPR43 (GY/BU), harness side and ground.
- For DTC B1170, measure the voltage between RH PRB motor C3186-3, circuit VPR46 (GY/OG), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
No
GO to E8.
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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 motor C3185-3, circuit VPR43 (GY/BU), harness side and PRB module C4322B-9, circuit VPR43 (GY/BU), harness side and between LH PRB motor C3185-3, circuit VPR43 (GY/BU), harness side and ground.
- For DTC B1170, measure the resistance between RH PRB motor C3186-3, circuit VPR46 (GY/OG), harness side and PRB module C4322B-10, circuit VPR46 (GY/OG), harness side and between RH PRB motor C3186-3, circuit VPR46 (GY/OG), harness side and ground.
- Is the resistance less than 5 ohms between the PRB motor and PRB module; and greater than 10,000 ohms between the PRB motor and ground?
Yes
GO to E10.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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E9 CHECK THE PRB MODULE FOR CORRECT OPERATION
- Connect: PRB LH Motor C3185.
- Connect: PRB RH Motor C3186.
- Disconnect all PRB module connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all PRB 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 module. REFER to Power Running Board (PRB) Module Service and Repair. 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.
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E10 CHECK THE PRB MODULE FOR CORRECT OPERATION
- Connect: PRB LH Motor C3185.
- Connect: PRB RH Motor C3186.
- Disconnect all PRB module connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all PRB 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.
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E11 CHECK THE PRBs 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 and check to see if any foreign material is caught in the PRB hinge points, step area or door sill. If foreign material is found, clean the PRB 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 hinge points, step area and door sill of the PRBs for foreign material or blockage. If any foreign material or blockage is found, remove it, and if necessary, set the PRB system to the OUT mode and clean the PRB hinge points, step area and door sill with a high-pressure washer. Avoid direct spray to the motor.
- Set the PRB 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 should deploy when the door is open, and retract 2 seconds after the door is closed.
- Open and close the RH front door. The RH PRB should deploy when the door is open, and retract 2 seconds after the door is closed.
- Do the LH and RH PRBs 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 bracket assembly. REFER to Power Running Board (PRB) Bracket Power Running Board (PRB) Bracket. CLEAR the DTCs. REPEAT the self-test.
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