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Pinpoint Tests




Pinpoint Test






Pinpoint Test A: Adjustable Brake Pedal is Inoperative/Does Not Operate Correctly

Refer to Wiring Diagram Set 127, Adjustable Pedal for schematic and connector information. Diagrams By Number

Normal Operation

Central Junction Box (CJB) fuse 14 (15A) provides fused battery voltage to the adjustable pedal switch along circuit 1567 (RD/LG). The adjustable pedal switch distributes this voltage to the adjustable pedal motor along circuits 1494 (RD) and 1495 (WH) depending on switch position.

To move the pedals forward (away from the driver), the voltage is sent from the switch to the adjustable pedal motor along circuit 1494 (RD), the voltage returns from the motor to the switch along circuit 1495 (WH) and is grounded through the switch along circuit 57 (BK).

To move the pedals rearward (towards the driver), the voltage is sent from the switch to the adjustable pedal motor along circuit 1495 (WH), the voltage returns from the motor to the switch along circuit 1494 (RD) and is grounded through the switch along circuit 57 (BK).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Foreign material
- Adjustable pedal cable(s)
- Adjustable pedal switch
- Adjustable pedal motor
- Adjustable pedal assembly
- Adjustable accelerator pedal assembly

PINPOINT TEST A: ADJUSTABLE BRAKE PEDAL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

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A1 CHECK THE ADJUSTABLE PEDAL MOTOR FOR SOUND


- Allow 2 minutes for the thermal overload to reset.
- Operate the adjustable pedal control switch.
- Can the adjustable pedal motor be heard to operate?

Yes
GO to A2.

No
GO to A6.

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A2 CHECK THE ADJUSTABLE PEDAL MOTOR INSTALLATION


- Check adjustable pedal motor for correct installation.
- Is the motor installed correctly?

Yes
GO to A3.

No
CORRECT the motor installation. TEST the system for normal operation.

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A3 CHECK THE ADJUSTABLE ACCELERATOR PEDAL SYSTEM


- Disconnect the adjustable pedal cable from the brake pedal drive.




- Operate the adjustable pedal control switch.
- Does the adjustable pedal motor operate now?

Yes
INSPECT the adjustable pedal assembly for any foreign material. REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

If no foreign material is found, INSTALL a new adjustable brake pedal assembly. REFER to Brake Pedal and Bracket Service and Repair. TEST the system for normal operation.

No
GO to A4.

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A4 INSPECT THE ACCELERATOR PEDAL ASSEMBLY FOR FOREIGN MATERIAL


- Inspect the adjustable accelerator pedal assembly for foreign material causing a binding condition.
- Was any foreign material found?

Yes
REMOVE the foreign material. TEST the system for normal operation.

No
GO to A5.

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A5 CHECK THE ADJUSTABLE BRAKE PEDAL CABLE


- Disconnect the adjustable pedal cable from the motor.
- Inspect the ends of the adjustable pedal cable for wear or damage.
- Are the cable ends OK?

Yes
GO to A6.

No
INSTALL a new accelerator pedal and bracket. REFER to Acceleration Control Accelerator Pedal and Bracket. TEST the system for normal operation.

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A6 CHECK CIRCUITS 1495 (WH) AND 1494 (RD) FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: Adjustable Pedal Switch C2089.
- Ignition ON.
- Measure the voltage between ground and:
- adjustable pedal switch C2089-1, circuit 1495 (WH), harness side.
- adjustable pedal switch C2089-7, circuit 1494 (RD), harness side.




- Is any voltage present?

Yes
REPAIR the affected circuit(s). TEST the system for normal operation.

No
GO to A7.

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A7 CHECK FOR VOLTAGE TO THE ADJUSTABLE PEDAL SWITCH


- Measure the voltage between adjustable pedal switch C2089-2, circuit 1567 (RD/LG), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A8.

No
VERIFY CJB fuse 14 (15A) is OK. If OK, REPAIR circuit 1567 (RD/LG). TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number

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A8 CHECK CIRCUIT 57 (BK) FOR AN OPEN


- Ignition OFF.
- Measure the resistance between ground and:
- adjustable pedal switch C2089-3, circuit 57 (BK), harness side.
- adjustable pedal switch C2089-6, circuit 57 (BK), harness side.




- Are the resistances less than 5 ohms?

Yes
GO to A9.

No
REPAIR circuit 57 (BK). TEST the system for normal operation.

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A9 TEST THE ADJUSTABLE PEDAL MOTOR REARWARD CIRCUIT


- Connect fused jumper wires between:
- adjustable pedal switch C2089-1, circuit 1495 (WH), harness side and adjustable pedal switch C2089-2, circuit 1567 (RD/LG), harness side.
- adjustable pedal switch C2089-7, circuit 1494 (RD), harness side and adjustable pedal switch C2089-3, circuit 57 (BK), harness side.




- Do the adjustable pedals move rearward?

Yes
GO to A10.

No
GO to A11.

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A10 TEST THE ADJUSTABLE PEDAL MOTOR FORWARD CIRCUIT


- Connect fused jumper wires between:
- adjustable pedal switch C2089-7, circuit 1494 (RD), harness side and adjustable pedal switch C2089-2, circuit 1567 (RD/LG), harness side.
- adjustable pedal switch C2089-1, circuit 1495 (WH), harness side and adjustable pedal switch C2089-6, circuit 57 (BK), harness side.




- Do the adjustable pedals move forward?

Yes
INSTALL a new adjustable pedal switch. TEST the system for normal operation.

No
GO to A11.

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A11 CHECK CIRCUITS 1495 (WH) AND 1494 (RD) FOR AN OPEN


- Connect: Adjustable Pedal Switch C2089.
- Disconnect: Adjustable Pedal Motor C2003.
- Measure resistance between ground and:
- adjustable pedal motor C2003-1, circuit 1495 (WH), harness side.
- adjustable pedal motor C2003-2, circuit 1494 (RD), harness side.




- Are the resistances less than 5 ohms?

Yes
INSTALL a new accelerator pedal and bracket. REFER to Acceleration Control Accelerator Pedal and Bracket. TEST the system for normal operation.

No
REPAIR the affected circuit(s). TEST the system for normal operation.

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