This actuator fault DTCs document explains Fault Code 3616 for the VGT actuator position diagnostic on Cummins electronic engines. It covers the circuit description, component location, diagnostic running conditions, fault setting logic, ECM action, clearing conditions, and shop guidance for calibration checks.
Official actuator fault DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL VGT actuator circuit coverage |
| System/Group | DTCs; VGT actuator circuit; Fault Code 3616 |
| Publication no. | Not stated in the extract |
| Year/Revision | Year unknown; last modified 01-Aug-2010 |
| Pages | 2 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Fault Code 3616
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Refer to Troubleshooting Fault Code t05-3616
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 engines in the 2007-09 group, based on the file information. The extract also names ISB, ISC, and ISL in relation to the VGT actuator circuit, with the VGT actuator located on the turbocharger bearing housing and communicating with the primary engine ECM over the J1939 data link. For manufacturer information, visit Cummins official website.
Who needs this actuator fault DTCs manual
Workshop technicians, diesel mechanics, and fleet repair teams need this manual when Fault Code 3616 appears or when a key-on VGT actuator position issue must be checked before deeper troubleshooting. It is also useful when verifying whether ECM calibration history should be reviewed through QuickServe™ Online and whether Procedure 019-032 in Section 19 may apply.
The diagnostic described here runs continuously when the keyswitch is initially turned to the ON position, but the keyswitch must be completely OFF for more than 30 seconds before the diagnostic will run at initial key ON. Fault Code 3616 is described as “VGT Actuator Position – Special Instructions,” with no lamp shown in the extract and a possible engine power derate. The ECM logs the fault code 10 seconds after the diagnostic runs and fails, and the code becomes inactive if the error condition no longer exists.
The shop notes state that this is an informational fault code indicating that the VGT actuator was unable to go to the desired position at key ON. While active, the ECM continuously attempts to restore normal VGT operation until engine coolant temperature reaches 74°C [165°F]. If the condition still exists after that temperature, Fault Code 2387 becomes active and Fault Code 3616 becomes inactive; Fault Code 2346 may also set due to a resulting fueling derate.
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