The Cummins fault code 436 troubleshooting manual is the official Cummins diagnostic procedure for the intake manifold temperature sensor circuit on the ISX11.9 CM2250 engine platform. The intake manifold 1 temperature sensor is a variable-resistor sensor that measures the temperature of air entering the intake manifold, and the ECM uses this value for the engine protection and emission control systems. This 17-page PDF walks a technician from symptom to verified repair.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | Cummins ISX11.9 CM2250 (2010-12), Cummins ISX12 CM2250 (2010-12) |
| System / Group | intake manifold temperature sensor circuit, DTCs |
| Fault code reference | Fault Code 436 — SPN 105, FMI 2 |
| Warning lamp | an amber warning lamp |
| Revision (Last Modified) | 11-Jun-2010 |
| Pages | 17 |
| File size | 0.22 MB |
| Format | |
| Language | English |
Cummins fault code 436 document contents
- Overview and Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Code
- Action Taken When the Fault Code Is Active
- Conditions for Clearing the Fault Code
- Shop Talk and possible causes
- Associated Procedures table
- Guided troubleshooting steps
- Verify the repair
Applicable truck models covered
This procedure applies to Cummins engines that report Fault Code 436 (SPN 105, FMI 2), including the Cummins ISX11.9 CM2250 (2010-12), Cummins ISX12 CM2250 (2010-12). Always confirm the exact calibration and publication for your engine on the official Cummins engine support site before ordering parts.
Common causes and symptoms
The ECM estimates intake manifold temperature, disables diesel exhaust fluid dosing and DPF regeneration, closes the EGR valve and, after extended operation, reduces engine torque. Shop Talk in the document lists the most likely causes:
- In-range malfunction of the engine intake manifold temperature sensor
- High resistance in the sensor signal or return lines
- Loose or corroded connector pins
Who needs the Cummins fault code 436 manual
Diesel technicians and workshop owners diagnosing Fault Code 436 on ISX11.9 CM2250 trucks need this manual to follow the guided steps, use the correct connector pins and verify the repair with INSITE electronic service tool instead of guessing.
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