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APS DTC Is Set (SB01-04-S001)

Publication date: 2001-06-01
Reference number: SB01-04-S001

APS DTC IS SET

APS DTC IS SET

TECHNICAL SERVICE BULLETIN

Reference Number(s): SB01-04-S001, Date of Issue:  June, 2001
ISUZU: 2000-2001 Trooper (UX); 2000-2001 Rodeo (UE); 2000-2001 Amigo; 2001 Rodeo Sport (UA) with Electronic Throttle, equipped with V6 engines
GROUP: Electrical

AFFECTED VEHICLES

2000-2001 Trooper (UX), Rodeo (UE) and Amigo/Rodeo Sport (UA) with Electronic Throttle, equipped with V6 engines.

SERVICE INFORMATION

CONDITION

The engine may occasionally experience idle fluctuation and/or the MIL will illuminate because an accelerator position sensor (APS) DTC is set: P1271, P1273, P1275, P1280 or P1285. Also the Reduced Power light may be on.

POSSIBLE CAUSE

The APS is contaminated with dust and grease, which is affecting the resistance values of both AP1 & AP2.

NOTE: AP1 and AP2 are inverse signals and should always add up to 100% +/- 1%. A DTC will set when the sum is 95% or less, or 105% or more

CORRECTION

Replace and adjust the APS, remove grease from the pedal assembly, clean the electrical connector(s), and check the signal voltage for API using the Tech 2.

SERVICE PROCEDURE

  1. Park and secure the vehicle.
  2. Turn the ignition key off.
  3. Disconnect the harness connector from the Accelerator Position Sensor. See Fig 1 .
    Fig 1: Identifying Accelerator Position Sensor (APS)
    G00071650Courtesy of ISUZU MOTOR CO.
  4. Remove the Accelerator Position Sensor. See Fig 1 .
  5. Remove all grease residues from the Accelerator Position Sensor mounting.
  6. Clean all connector pins with contact cleaner. Use LOCTITE(R)/Peramtex Electrical Contact Cleaner, or equivalent.
    NOTE: Do not use brake cleaner or carburetor spray.
  7. Allow the connector to dry.
    NOTE: Do not apply grease or any other material to the terminal pins.
  8. Install the new Accelerator Positioning Sensor with the screws loose to allow for sensor adjustment. See Fig 2 .
    Fig 2: Rotating Accelerator Position Sensor
    G00071651Courtesy of ISUZU MOTOR CO.
    IMPORTANT: Whenever the Accelerator Position Sensor is replaced, the sensor must be adjusted.
  9. Install the harness connector to the Accelerator Position Sensor.
  10. Install the Tech 2 and turn the key to the "ON" Position.
  11. Under Engine Data, scroll down to AP1 percentage opening value.
  12. Adjust the Accelerator Position Sensor (APS) until the percentage of AP1 opening is between 11 and 15%. Tighten the Accelerator Position Sensor screws. See Fig 2 .
  13. Using a DVOM, measure AP1 signal voltage at pin #5 (white wire) of the APS connector. The Set Voltage, after the percentage is set, will be .6 volts at pin #5 of C-48.
    NOTE: Remember the Tech 2 does not give a voltage value for AP1. Please refer to 2000 Rodeo/Amigo, and/or 2000 Trooper Electrical Troubleshooting Manual for circuit schematic.
  14. If less than .6 volts, troubleshoot for high resistance in the black wire (APS pin #10) between the APS and PCM, or low reference voltage (should be 5.0v) from the PCM. Try a known good PCM first.
    • If equal to .6 volt, the circuit is functioning properly.
    • If more than .6 volt, troubleshoot for high resistance in the red wire (APS pin #4) between the APS and PCM.
    • After the adjustment is performed please verify the following reading:
    TROUBLESHOOTING VALUES

    APS Percentage of Opening Percentage of Opening
    APS 1 11-15% @ Idle 85-89% @ Wide Open Throttle
    APS 2 85-89% @ Idle 11-15% @ Wide Open Throttle
    APS 3 85-89% @ Idle 32-36% @ Wide Open Throttle
  15. Remove the Tech 2 and return the vehicle to the customer.

PARTS INFORMATION

PARTS INFORMATION

Part Number Description Quantity Required
8-97193-713-0 Sensor, Acceleration Position 1

WARRANTY CLAIM INFORMATION

Use the Following new labor Operation:

WARRANTY CLAIM INFORMATION

Operation Operation Number Task Time Additional Instructions
APS DTC 020211 Replace .5 ---

Labor Time includes administrative time allowance.

WARRANTY CLAIM SUBMISSION INFORMATION

For your convenience, please use the following information when submitting your warranty claim:

WARRANTY CLAIM SUBMISSION INFORMATION

DESCRIPTION VALUE
LABOR OPERATIONS: 020211
LABOR TIME ALLOWED: .5 HOURS
TROUBLE CODE: 71
SUBLET CODE: -
SUBLET ALLOWANCE: -
FAILED PART NUMBER: 8-97193-713-0, Sensor; Accelerator Position
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