fault code 2636 DTCs is the Cummins ISX11.9 CM2250 troubleshooting document for VGT Actuator Driver Circuit – Abnormal Update Rate (SPN 641, FMI 9/9). This 20-page factory guide explains the circuit, the conditions that set the code, and the guided repair steps used with the INSITE electronic service tool. The variable geometry turbocharger (VGT) is electronically activated by the VGT actuator.
Official document details
| Brand | Cummins |
| Model coverage | ISX11.9 CM2250/ISB6.7 CM2250/ISC8.3 and ISL9 CM2250/ISX15 CM2250 |
| System / group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 2636 (PID S027) |
| SPN / FMI | 641 / 9/9 |
| Warning lamp | Red |
| Bulletin number | 2883445 |
| Revision | Last modified 04-Jan-2011 |
| Pages | 20 |
| File size | 0.2 MB |
| Format | |
| Language | English |
fault code 2636 DTCs table of 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
Applicable truck models
This troubleshooting procedure applies to Cummins ISX11.9 CM2250/ISB6.7 CM2250/ISC8.3 and ISL9 CM2250/ISX15 CM2250 engines. The VGT actuator is located on the turbocharger bearing housing. The document states the code is set when fault code 2636 vgt actuator driver circuit – abnormal update rate code reason effect fault code: 2636 pid: s027 spn: 641 fmi: 9/9 lamp: red srt:. When the code is active, the red warning lamp is illuminated when this diagnostic runs and fails. Full specifications and procedure references are published by Cummins on the Cummins official website.
Who needs this fault code 2636 DTCs manual
Diesel technicians and workshop owners diagnosing Abnormal Update Rate on ISX11.9 CM2250 engines need this reference. Possible causes documented in the Shop Talk section include the vgt actuator is not receiving power from the, circuit in the power supply wire or low voltage, rapid cycling of the keyswitch, an open return circuit on the vgt actuator circuit. The guide walks through each guided step and the INSITE electronic service tool tests required to validate the repair and clear the code. Each guided step lists the keyswitch position, the required action, and the YES or NO branch that follows.
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