This fault code DTCs document covers Fault Code 153 for the intake manifold air temperature sensor circuit on ISB CM550 applications. It explains the code identifiers, sensor purpose, component location, resistance checks, harness checks, ECM connector checks, and final verification steps.
Official fault code DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB CM550 (1990-94) |
| System/Group | DTCs; intake manifold air temperature sensor circuit |
| Publication no. | Fault Code 153 |
| Year/Revision | Unknown; document extract shows Copywrite 2017 |
| Pages | 5 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE: 153
- PID: P105
- SPN: 105
- FMI: 3 or 4
- INTAKE MANIFOLD AIR TEMPERATURE SENSOR CIRCUIT
- DESCRIPTION
- Temperature, resistance table for the intake manifold air temperature sensor
- COMPONENT LOCATION
- TROUBLESHOOTING STEPS
- Step 1A: check for active fault codes using the diagnostic tool
- Step 2A: inspect the intake manifold temperature sensor and engine harness connector pins
- Step 2B: check the resistance of the intake manifold air temperature sensor
- Step 2C: check for a short circuit to ground
- Step 3A: inspect the engine harness and ECM connector pins
- Step 3B: check for an open circuit
- Step 3C: check for a short circuit to ground
- Step 3D: check for a short circuit from pin to pin
- Step 4A: disable the fault code and verify Fault Code 153 is inactive
- Step 4B: clear the inactive fault codes using the diagnostic tool
Applicable truck models
This file applies to Cummins ISB CM550 engines in the 1990-94 coverage shown in the document group. The extract identifies the intake manifold air temperature sensor as being located on the side of the intake manifold at the rear of the head, and it gives checks for sensor pins A and B, ECM engine harness pins 19 and 34, connector condition, open circuits, shorts to ground, and pin-to-pin shorts. For official manufacturer information, visit Cummins official website.
Who needs this fault code DTCs manual
Workshop owners, diesel mechanics, and fleet technicians need this fault code DTCs manual when diagnosing FMI 3 or 4 complaints linked to SPN 105 and PID P105. It is useful when a diagnostic tool reports Fault Code 153 and the technician must decide whether the problem is the intake manifold temperature sensor, the engine harness, connector pins, or an unresolved active fault code such as Fault Codes 352 and 386.
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