Test Procedure
- AC1 DIAGNOSTIC TROUBLE CODE (DTC) P1000 NOTE: If the voltage to the powertrain control module (PCM) is disconnected, DTC P1000 is set until the OBD monitors have run and cleared.
- DTC P1000 indicates that the operating conditions have not been satisfied for all of the OBD monitors to run.
- Ignition ON, engine OFF.
- Carry out the self-test.
Are any DTCs present other than P1000?
Yes No DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS to continue diagnosis. GO to AC2. - AC2 CARRY OUT THE DIESEL DRIVE CYCLE TEST
- Carry out the diesel drive cycle test. Refer to DRIVE CYCLES .
Is the P1000 cleared?
Yes No No issue, DTC P1000 cleared. GO to AC3. - AC3 VERIFY CERTAIN OPERATING CONDITIONS HAVE BEEN SATISFIED
- Ignition ON, engine OFF.
- Access the PCM and monitor the EOT PID.
- Access the PCM and monitor the VPWR PID.
- Access the PCM and monitor the GPCTM PID.
- If the vehicle is started and the EOT is less than 55°C (131°F), VPWR must be between 11.5 and 14 volts until the glow plug duty cycle is 0%.
- Access the PCM and monitor the MFDES PID.
- Access the PCM and monitor the RPM PID.
- Operate the engine at full load. At full load the MFDES must be greater than 37 mg/stroke for at least 12 seconds with the engine speed greater than 2,300 RPM.
- Access the PCM and monitor the MFDES PID.
- Allow the engine to idle at the normal operating temperature. The MFDES must be less than 12 mg/stroke for at least 12 seconds.
With the above conditions met, is the P1000 cleared?
Yes No No issue, DTC P1000 cleared. REFER to PERFORMANCE DIAGNOSTIC PROCEDURES to continue diagnosis.