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FAULT CODE 132 (ISS)

Accelerator Position Sensor Circuit

Printable Version  Printable Version

Overview

CODE REASON EFFECT
Fault Code: 132
PID: P091
SPN: 91
FMI: 4
LAMP: Red
SRT: 00-084		 Low voltage detected at the accelerator position signal pin-11 of the OEM harness connector. Severe derate (power and speed).

Accelerator Position Sensor Circuit

Circuit Description

The accelerator position sensor is attached to the accelerator pedal. The accelerator position sensor sends a signal to the electronic control module (ECM) when the driver pushes on the accelerator pedal. The accelerator position circuit contains three wires: positive (+) 5-VDC supply (wire 18), return (wire 19), and signal (wire 11).

Component Location

The accelerator position sensor is located on the accelerator pedal.

Shop Talk

If all wiring and sensors check good, replace the accelerator position sensor circuit wires between the accelerator pedal and ECM with new wires. Run them through, or around, the bulkhead without using the bulkhead connector. Test with these wires. If fault clears, replace the OEM harness. Seal the bulkhead openings around the wires to prevent toxic, noxious fumes from seeping into the operator area.

The ECM and accelerator pedal
must be calibrated to each other for proper engine response. This is required when a new accelerator pedal is installed, replaced, an ECM is replaced, a new calibration is downloaded to the ECM, or the accelerator pedal wiring is disconnected while keyswitch ON. With keyswitch ON, slowly push the accelerator to the floor and release; do this three times. This calibrates the ECM and accelerator pedal. Note: The three wires in the accelerator position sensor circuit
must be twisted together.

Cautions and Warnings

 CAUTION 

 

To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement:
Part Number 3823995 – male Weather-Pack™ test lead
Part Number 3823996 – female Weather-Pack™ test lead
Part Number 3822758 – male Deutsch™/AMP™/Metri-Pack™ test lead
Part Number 3822917 – female Deutsch™/AMP™/Metri-Pack™ test lead
Part Number 3823255 – 3-pin Metri-Pack™ repair connector
Part Number 3824910 – 6-pin Metri-Pack™ repair connector.
 CAUTION 

 

To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM.

Troubleshooting Steps

STEPS SPECIFICATIONS
STEP 1. Check the accelerator pedal.
STEP 1A. Verify the accelerator position sensor is connected to the OEM harness. Sensor connected
STEP 1B. Inspect the harness and the accelerator position sensor connector pins. No damaged pins
STEP 1C. Check the accelerator position resistance. 2000 to 3000 ohms
STEP 1D. Check the resistance between sensor pins. Released: 1500 to 3000 ohms, depressed: 200 to 1500 ohms
STEP 1E. Check for a short circuit to ground of the sensor positive (+) 5-VDC supply. More than 100k ohms
STEP 1F. Check for a short circuit to ground of the sensor signal wire. More than 100k ohms
STEP 2. Check the OEM harness.
STEP 2A. Inspect the harness and the ECM connector pins. No damaged pins
STEP 2B. Check for continuity from ECM to accelerator position sensor. Less than 10 ohms
STEP 2C. Check the resistance between the positive (+) 5-VDC supply and return wires. 2000 to 3000 ohms
STEP 2D. Check the resistance in the positive (+) 5-VDC supply and the signal wire. Released: 1500 to 3000 ohms, depressed: 200 to 1500 ohms
STEP 2E. Check for a short circuit to ground. More than 100k ohms
STEP 2F. Check for a short circuit. More than 100k ohms
STEP 3. Check the ECM.
STEP 3A. Check the accelerator position supply for proper voltage. 4.75 to 5.25-VDC
STEP 3B. Check for the appropriate ECM response. Fault Code 132 inactive, Fault Code 131 active
STEP 3C. Check ECM for signal pin resistance. Less than 100k ohms
STEP 4. Clear the fault codes.
STEP 4A. Disable the fault code. Fault Code 132 inactive
STEP 4B. Clear the inactive fault codes. All fault codes cleared

Guided Step 1 – Check the accelerator pedal.

Guided Step 1A – Verify that the accelerator position sensor is connected to the OEM harness.

Conditions

  • Turn keyswitch OFF.

Action

Inspect the accelerator position sensor.

  • Verify the accelerator position sensor is connected to the OEM harness.
OK NOT OK
Sensor connected Connect the OEM harness

Guided Step 1B – Inspect the harness and the accelerator position sensor connector pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the accelerator position sensor.
  • Flush and clean the connector pins using electronic contact cleaner, Part Number 3824510.

Action

Inspect the harness and the accelerator position sensor connector pins for:

  • Loose connector
  • Corroded pins
  • Bent or broken pins
  • Pushed back or expanded pins
  • Moisture in or on the connector
  • Missing or damaged seals
  • Dirt or debris in or on the connector pins
  • Connector shell broken
  • Wire insulation damage
  • Damaged connector locking tab.
OK NOT OK
No damaged pins Repair the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Repair the engine harness. Refer to Procedure
    019-201 or
    019-202.
  • Replace the OEM harness. Refer to the OEM service manual.
  • Replace the accelerator position sensor. Refer to the OEM service manual.

Guided Step 1C – Check the accelerator position resistance.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the accelerator position sensor.

Action

Check for an open circuit or a short circuit between pins in the accelerator position sensor.

  • Measure the resistance between the positive (+) 5-VDC supply and the accelerator position sensor return on the sensor side of the accelerator position sensor when the accelerator pedal is released and when it is depressed.

Note: Install a 3-pin repair connector, Part Number 3823255, into the accelerator position sensor for idle validation switch; a 6-pin repair connector, Part Number 3824910, for integrated sensor switch.
OK NOT OK
2000 to 3000 ohms Replace the accelerator position sensor. Refer to the OEM service manual.

Guided Step 1D – Check the resistance between sensor pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect OEM harness from accelerator position sensor.

Action

Check the resistance between sensor pins.

  • Measure the resistance with the accelerator pedal depressed and again when pedal is released. Measure the resistance from the positive (+) 5-VDC supply to the signal wire on the sensor side of the accelerator position sensor connector.

Note: Install a 3-pin repair connector, Part Number 3823255, into the accelerator position sensor for idle validation switch; a 6-pin repair connector, Part Number 3824910, for integrated sensor switch.
OK NOT OK
Released: 1500 to 3000 ohms, depressed: 200 to 1500 ohms Repair or replace the accelerator pedal. Refer to the OEM service manual.

Guided Step 1E – Check for a short circuit to ground of the sensor positive (+) 5-VDC supply.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the accelerator position sensor.

Action

Check for a short circuit to ground of the sensor positive (+) 5 VDC supply.

  • Measure the resistance from the positive (+) 5-VDC supply on the sensor side of the accelerator position sensor to chassis ground.
OK NOT OK
More than 100k ohms Replace the accelerator position sensor. Refer to the OEM service manual.

Guided Step 1F – Check for a short circuit to ground of the sensor signal wire.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the accelerator position sensor.

Action

Check for a short circuit to ground of the sensor signal wire.

  • Measure the resistance from the signal pin of the accelerator position sensor to chassis ground.
OK NOT OK
More than 100k ohms Replace the accelerator position sensor. Refer to the OEM service manual.

Guided Step 2 – Check the OEM harness.

 CAUTION 

 

To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM.
Guided Step 2A – Inspect the harness and the ECM connector pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.
  • Disconnect the OEM harness from the bulkhead connector.
  • Disconnect the OEM harness from the accelerator position sensor.
  • Flush and clean the connector pins using electronic contact cleaner, Part Number 3824510.

Action

Inspect the harness and the ECM connector pins for:

  • Loose connector
  • Corroded pins
  • Bent or broken pins
  • Pushed back or expanded pins
  • Moisture in or on the connector
  • Missing or damaged seals
  • Dirt or debris in or on the connector pins
  • Connector shell broken
  • Wire insulation damage
  • Damaged connector locking tab.
OK NOT OK
No damaged pins Repair the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Repair the OEM harness. Refer to Procedure
    019-203.
  • Replace the OEM harness. Refer to the OEM service manual.
  • Call for authorization to replace the ECM. Upon receipt of authorization, replace the ECM. Refer to Procedure
    019-031.
  • Replace the o-ring on the 28-pin connector if it is damaged or missing. Refer to Procedure
    019-203.

Guided Step 2B – Check for continuity from ECM to accelerator position sensor.

Conditions

  • Turn keyswitch OFF.
  • Connect OEM harness to bulkhead connector.
  • Disconnect OEM harness from accelerator pedal.
  • Disconnect OEM harness connector from the ECM.

Action

Check for continuity from ECM to accelerator position sensor.

  • Measure the resistance from pin-18 of the ECM OEM harness connector to the positive (+) 5-VDC supply pin of the accelerator position sensor.
  • Measure the resistance from pin-11 of the ECM OEM harness connector to the signal pin of the accelerator position sensor.
  • Measure the resistance from pin -in of the accelerator position sensor.
OK NOT OK
Less than 10 ohms Repair or replace the accelerator position sensor wiring

  • Repair the accelerator position sensor wiring. Refer to Procedure
    019-201 or
    019-202.
  • Replace the accelerator position sensor wiring. Refer to the OEM service manual.

Guided Step 2C – Check the resistance between the positive (+) 5-VDC supply and return wires.

Conditions

  • Turn keyswitch OFF.
  • Connect the OEM harness to the accelerator position sensor.
  • Disconnect the OEM harness connector from the ECM.
  • Connect the OEM harness to the bulkhead connector.

Action

Check the resistance between the positive (+) 5 VDC supply and return wires.

  • Measure the resistance between pin-18 and pin-19 of the OEM harness connector.
OK NOT OK
2000 to 3000 ohms Repair or replace the OEM harness. Refer to the OEM service manual.

Guided Step 2D – Check the resistance in the positive (+) 5-VDC supply and the signal wire.

Conditions

  • Turn keyswitch OFF.
  • Connect the OEM harness to the throttle position sensor.
  • Connect the OEM harness to the bulkhead connector.
  • Disconnect the OEM harness connector from the ECM.

Action

Check the resistance between the positive (+) 5 VDC supply and the signal wire.

  • Measure the resistance from pin-18 to pin-11 when the accelerator pedal is released and again when pedal is depressed.
OK NOT OK
Released: 1500 to 3000 ohms, depressed: 200 to 1500 ohms Repair or replace the OEM harness. Refer to the OEM service manual.

Guided Step 2E – Check for a short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.
  • Disconnect the OEM harness from the accelerator position sensor.

Action

Check for a short circuit to ground.

  • Measure the resistance between pin-18 of the OEM harness and the engine block ground.
  • Measure the resistance from pin-11 of the OEM harness to engine block ground.
OK NOT OK
More than 100k ohms Repair or replace the OEM harness. Refer to the OEM service manual.

Guided Step 2F – Check for a short circuit.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.
  • Disconnect the OEM harness from the accelerator position sensor.

Action

Check for a short circuit.

  • Measure the resistance from pin-11 to all other pins of the OEM harness connector.
  • Measure the resistance from pin-18 to all other pins of the OEM harness connector.
  • Measure the resistance from pin-19 to all other pins of the OEM harness connector.
OK NOT OK
More than 100k ohms Repair or replace the OEM harness. Refer to the OEM service manual.

Guided Step 3 – Check the ECM.

Guided Step 3A – Check the accelerator position supply for proper voltage.

Conditions

  • Connect the OEM harness to the accelerator position sensor.
  • Disconnect the OEM harness connector from the ECM.
  • Turn keyswitch ON.

Action

Check the accelerator position supply for proper voltage.

  • Measure the voltage from pin-18 to pin-19 in the OEM port at the ECM.
OK NOT OK
4.75 to 5.25-VDC
  • Call for authorization to replace the ECM. Upon receipt of authorization, replace the ECM. Refer to Procedure
    019-031.

Guided Step 3B – Check for the appropriate ECM response.

Conditions

  • Disconnect the OEM harness connector from the ECM.
  • Install Part Number 3822917, as a jumper wire, between pin-19 and pin-11 at the OEM ECM port.
  • Turn keyswitch ON.

Action

Check for the appropriate ECM response.

  • Install Part Number 3822917, as a jumper wire, between ECM OEM harness port pin-11 to pin-18.
  • Use INSITE™ electronic service tool read the fault codes.
OK NOT OK
Fault Code 132 inactive, Fault Code 131 active
  • Call for authorization to replace the ECM. Upon receipt of authorization, replace the ECM. Refer to Procedure
    019-031.

Guided Step 3C – Check ECM signal pin resistance.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.

Action

Check signal pin resistance at the ECM.

  • Measure the resistance from pin-11 of the ECM OEM port to pin-19 in the ECM OEM port; use test lead, Part Number 3822917.
OK NOT OK
Less than 100k ohms
  • Call for authorization to replace the ECM. Upon receipt of authorization, replace the ECM. Refer to Procedure
    019-031.

Guided Step 4 – Clear the fault codes.

Guided Step 4A – Disable the fault code.

Conditions

  • Connect all the components.

Action

Disable the fault code.

  • Start the engine and let it idle for 1 minute.
  • Verify Fault Code 132 is inactive.
OK NOT OK
Fault Code 132 inactive Return to the troubleshooting steps or contact your nearest Cummins Authorized Repair Location if all the steps have been completed and checked again.

Guided Step 4B – Clear the inactive fault codes.

Conditions

  • Connect all the components.

Action

Clear the inactive fault codes.

  • Use INSITE™ electronic service tool to erase the inactive fault codes.
OK NOT OK
All fault codes cleared Troubleshoot any remaining active fault codes.
Repair complete
Appropriate troubleshooting chart
Last Modified:  21-Sep-2009
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