SPN 2003 - FMI 31 (General Transmission Fault Unknown)
Wednesday, December 30, 2020
ALLISON Transmission,
Caterpillar Electronic Technician,
Diesel Engine Software
WARNING - General Transmission Fault Unknown
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| Figure 1.1 - SPN 2003 FMI 31 (Murphy PowerView) |
Today, we'll trying to find out the troubleshooting of warning message: General Transmission Fault Unknown on Murphy PowerView PV101 display (refer to Figure 1.1 above).
We have Pump Truck with CAT Engine C-13 and Allison 4700OFS Transmission. When this warning message appears, the Transmission can't engaged.
#Here the STEPS:
1). Open CAT ET to check if any Active Codes on C-13 Engine. Read More: How to Connecting Caterpillar ET Software to the ECM, but there's no Active Codes (both Diagnostic and Event Codes).
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| Figure 1.2 - No Active Diagnostic Codes |
#Murphy PowerView PV100/ PV101 (Implementation of SAE J1939 Parameters)
#Support Allison DTC's as below:
- Retarded Temperature Above Normal (SPN 120 - FMI 15)
- Transmission Oil Temperature Above Normal (SPN 177 - FMI 15)
- Unknown General Transmission Fault (SPN 2003 - FMI 31)
2). Open Allison DOC and connect to diagnostic port on Allison Transmission. Read More: How to Connecting ALLISON Transmission using ALLISON DOC Software.
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| Figure 1.3 - DTC and General Information |
→No Active DTC's.
In this case, there are 4 logged codes: P2723, P2714, P0722, and P0731.
→Clearing the DTC's Information. Read More: Display DTC (Diagnostic Trouble Codes) Information on ALLISON DOC Software.
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| Figure 1.4 - Clear DTC Information |
3). After Clear DTC Information, then restart the power supply to TCM.
→The warning message General Transmission Fault Unknown should gone now..
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