This fault code 132 DTCs document is an 8-page troubleshooting manual for the accelerator position sensor circuit on ISB CM550 applications. It explains the sensor, ECM wiring, connector inspections, resistance checks, voltage checks, and final fault-code verification for Fault Code 132 with PID P091, SPN 091, FMI 3 or 4.
Official fault code 132 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB CM550 (1990-94) |
| System/Group | DTCs; accelerator position sensor circuit |
| Publication no. | Not shown in extract |
| Year/Revision | Unknown; copywrite 2017 shown on source pages |
| Pages | 8 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE: 132
- PID: P091
- SPN: 091
- FMI: 3 OR 4
- ACCELERATOR POSITION SENSOR CIRCUIT
- DESCRIPTION
- COMPONENT LOCATION
- TROUBLESHOOTING STEPS
- Step 1A: Inspect the OEM harness and accelerator position sensor connector pins
- Step 1B: Check for an open or short circuit between pins in the accelerator position sensor
- Step 1C: Check resistance between sensor pins with pedal depressed and released
- Step 1D: Check for a short circuit to ground in the sensor +5-VDC supply
- Step 1E: Check for a short circuit to ground in the SIGNAL wire
- Step 2A: Inspect the harness and ECM connector pins
- Step 2B: Check for an open circuit in the SUPPLY, SIGNAL, and RETURN wires
- Step 2C: Check for a short circuit from the +5-VDC SUPPLY wire to any other wire
- Step 2D: Check for a short circuit between the accelerator position SIGNAL wire and any other signal
- Step 2E: Check for a short circuit between the +5-VDC SUPPLY and RETURN wires
- Step 2F: Check for a short circuit to ground of the accelerator position sensor SIGNAL circuit
- Step 3A: Check the accelerator position supply voltage
- Step 4A: Disable and verify Fault Code 131 or 132 is inactive
- Step 4B: Clear inactive fault codes using the diagnostic tool
Applicable truck models
This file applies to Cummins ISB CM550 (1990-94) coverage as identified in the document group, with procedures centered on the accelerator pedal-mounted accelerator position sensor and its three-wire circuit to the electronic control module. The extract does not list truck makes or chassis models, and it notes that connector pin letters can vary with equipment manufacturer while the troubleshooting logic still applies. For manufacturer information, visit Cummins official website.
Who needs this fault code 132 DTCs manual
Workshop owners, diesel mechanics, and electrical diagnostic technicians need this fault code 132 DTCs manual when checking throttle signal faults, 5-VDC supply wiring, RETURN ground wiring, ECM pins 19, 29, and 30, or OEM harness damage. It is also useful when confirming repair completion by disabling the fault code, operating the accelerator pedal, and clearing inactive codes with a diagnostic tool.
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