This fault code 3532 DTCs troubleshooting document explains Fault Code 3532 for a Cummins ECM receiving ambient air temperature network data in error. It covers the J1939 multiplexing circuit, OEM VECU configuration checks, ECM calibration review, and fault clearing steps using INSITE™ electronic service tool.
Official fault code 3532 DTCs troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250, ISX15 CM2250, GX CM2250; file group listed as ISB6.7 CM2250 (2010-12) / DTCs |
| System/Group | J1939 Multiplexing / DTCs |
| Publication no. | Associated bulletin numbers: 4022250, 2883445 |
| Year/Revision | Last modified 11-Jun-2010 and 06-Dec-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Fault Code 3532 – Ambient Air Temperature – Received Network Data In Error
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the OEM VECU and engine ECM for proper multiplexing configuration.
- Guided Step 3 – Check ECM calibration and clear fault codes.
Applicable truck models
This PDF applies to Cummins CM2250 engine diagnostics where the Cummins ECM receives multiplexed component data over the SAE J1939 data link from an OEM VECU or transmission electronic control unit. The extract identifies ISX11.9 CM2250 and ISX15 CM2250 under J1939 Multiplexing, and the associated procedures table also lists GX CM2250 for ECM Calibration Code procedure 019-032. The file metadata groups the document under ISB6.7 CM2250 (2010-12) / DTCs, but the sampled pages themselves show ISX11.9 CM2250/ISX15 CM2250 coverage. For vehicle wiring and VECU location, the document directs users to the OEM service manual because J1939 data link wiring and VECU location vary by OEM. Manufacturer information is available at Cummins official website.
Who needs this fault code 3532 DTCs troubleshooting manual
Mechanics, fleet technicians, and workshop owners use this fault code 3532 DTCs troubleshooting manual when an amber CHECK ENGINE lamp or MIL is linked to SPN 171 FMI 19/19 and the ambient air temperature sensor signal is reported through network data. The procedure is aimed at checking active or intermittent faults, comparing OEM VECU and engine ECM multiplexing configuration, verifying source addresses, reviewing ECM calibration revisions, and clearing the code after the repair validation idle period.
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