fault code 436 DTCs troubleshooting manual — Service Bulletin

This fault code 436 DTCs document is a troubleshooting manual for an intake manifold 1 temperature fault on Cummins CM2250 engines. It explains the sensor circuit, fault logic, diagnostic conditions, repair validation, and guided INSITE™ checks for the 17-page PDF file.

Official fault code 436 DTCs document details

Brand Cummins
Model coverage ISB6.7 CM2250, with associated coverage also listing ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSB6.7 CM2250, QSL9 CM2250, GX CM2250, and other Cummins engine families shown in the procedures table.
System/Group ISB6.7 CM2250 (2010-12) / DTCs; Intake Manifold 1 Temperature/Pressure Sensor Circuit
Publication no. 4022254 for ISB6.7 CM2250 in the associated procedures table
Year/Revision Last Modified: 04-Jan-2011; overview section also shows 11-Jun-2010
Pages 17
File size 0.2 MB
Format PDF
Language English

Document table of contents

  • Overview
  • Circuit Description
  • Component Location
  • FAULT CODE 436 – Intake Manifold 1 Temperature – Data Erratic, Intermittent, or Incorrect
  • Conditions for Running the Diagnostics
  • Conditions for Setting the Fault Codes
  • Action Taken When the Fault Code is Active
  • Conditions for Clearing the Fault Code
  • Shop Talk
  • Associated Procedures
  • Guided Step 1 – Check for sensor circuit fault codes.
  • Guided Step 2 – Check the engine intake manifold temperature sensor and circuit.
  • Guided Step 3 – Check the ECM and engine harness.
  • Guided Step 4 – Clear the fault code.
  • Guided Step 5B – Disable the fault code.

Applicable truck models

The document applies to Cummins engines using the intake manifold 1 temperature/pressure sensor circuit described in the extract, including ISB6.7 CM2250 and related CM2250 listings in the associated procedures table. The main fault is SPN 105, FMI 2, where the ECM detects an erratic, intermittent, or incorrect intake manifold temperature value at initial key ON or while the engine is running. The procedure also references Fault Codes 153 and 154 during circuit response checks, along with ECM, engine harness, calibration code, and sensor replacement procedures. See Cummins engine information at Cummins official website.

Who needs this fault code 436 DTCs manual

Workshop owners, diesel technicians, and fleet mechanics need this file when diagnosing an amber CHECK ENGINE lamp, disabled diesel exhaust fluid injection, disabled DPF regeneration, closed EGR valve, or possible torque reduction caused by the intake manifold temperature fault. It is most useful when INSITE™ electronic service tool is available for active fault reading, circuit response checks, ECM calibration review, and repair verification after the required cold soak conditions.

The full PDF is available in the DiagTechPro manuals library, free account required to download.

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