This Cummins M11 code 442 sheet documents the unswitched battery supply circuit fault (PID P168, SPN 168, FMI 0, SRT 00-614) on the CELECT Plus engine. It is a 2-page yellow-lamp troubleshooting chart.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | M11 CELECT Plus (1995-98) |
| System / group | Unswitched Battery Supply Circuit |
| Fault code | 442 |
| PID / SPN | P168 / SPN 168 |
| FMI | 0 |
| Diagnostic lamp | Yellow |
| SRT | 00-614 |
| Pages | 2 |
| File size | 0.2 MB |
| Format | |
| Language | English |
| Source | Cummins fault code reference (TruckFaultCodes.com, 2017) |
Document table of contents
- Circuit description
- Component location
- Shop talk diagnostic notes
- Step-by-step troubleshooting
- Fault verification and clearing codes
Cummins M11 code 442 diagnosis
The ECM receives unswitched battery input through the actuator harness, protected by two in-line 15 Amp fuses that keep the engine harness from overheating; the battery return wires connect directly to the negative battery post. Shop talk directs the technician to disconnect all aftermarket devices from the battery supply circuit and confirm that the correct 15 Amp fuses are fitted. Troubleshooting begins by reading codes with Compulink, Echek, or diagnostic tool part number 3824638, confirming Fault Code 111 is inactive, then measuring battery voltage across the pins of the 3-pin power connector on the actuator harness.
Applicable truck models
It applies to the Cummins M11 CELECT Plus (1995-98) engine and its actuator harness. Battery location varies by chassis builder, so reference the OEM manual and the official Cummins website.
Who needs this M11 code 442 manual
Technicians chasing intermittent power, blown ECM fuses, or aftermarket wiring problems on M11 CELECT Plus trucks use these battery-voltage checks.
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Applies to these truck models
This is the manufacturer document shared across 2 model families. It applies to:
- Cummins DTCs
- Cummins M11 CELECT Plus (1995-98)
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