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Engine Control Module Calibration Memory Software – Bad Intelligent Device or Component
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 346 PID: 253 SPN: 630 FMI: 12 LAMP: Amber SRT: |
Engine Control Module Calibration Memory Software – Bad Intelligent Device or Component. Invalid switch configuration adjustable parameter setting have been detected by the engine control module (ECM). |
Various optional switch inputs to the ECM may not operate correctly. |
 Engine Control Module (ECM)
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Circuit Description
The accelerator interlock switch and powertrain protection torque limit switch, clutch pedal position switch and engine protection shutdown manual override switch, idle shutdown accessory relay and engine brake lamp output, switched maximum engine operating speed and governor type switch are all outputs or switched inputs from the ECM that can be enabled or disabled using INSITE™ electronic service tool. Many of the outputs and switched inputs share a common wire on the OEM wiring harness.
Component Location
The output or switched inputs to this diagnostic are found in the OEM harness.
Conditions for Running the Diagnostics
This diagnostic runs at initial key on only.
Conditions for Setting the Fault Codes
The ECM detects that features that share a common OEM harness input or output to the ECM are simultaneously enabled at the same time.
Action Taken When the Fault Code is Active
The ECM will set the fault code active immediately after the diagnostic is set. The features that are in conflict may not operate correctly.
Conditions for Clearing the Fault Code
The fault code will be set inactive at key on when the conflicting features have been adjusted correctly.
Shop Talk
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. Refer to Procedure 019-032 (ECM Calibration Code) in Section 19 in the corresponding Troubleshooting and Repair Manual for the engine being serviced.
Many of the outputs and switched inputs share a common wire on the OEM wiring harness. If two features that share a common OEM wire are enabled simultaneously in the ECM, this fault code will be logged. To disable the fault code, disable one of the features on the shared OEM wire. For example, if the accelerator interlock switch and powertrain protection torque limit switch are both enabled in the ECM, either disable one of the features with INSITE™ electronic service tool or configure one of the features to be multiplexed using the SAE® J1939 multiplexing feature.
Refer to Troubleshooting Fault Code t05-346
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