Test Procedure
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- AC1 DIAGNOSTIC TROUBLE CODE (DTC) P1000 NOTE: If power to the powertrain control module (PCM) is disconnected, 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.
- Possible causes:
- drive conditions not satisfied
- keep alive memory (KAM) cleared
- PCM
- Key ON, engine OFF.
- Carry out all PCM self-tests and check the continuous codes.
Are DTCs other than P1000 set?
Yes No REPAIR all other DTCs. REFER to DIAGNOSTIC TROUBLE CODE (DTC) DESCRIPTIONS . GO to AC2. - AC2 CARRY OUT THE DIESEL DRIVE CYCLE TEST
- Carry out the diesel drive cycle test. Refer to DIAGNOSTIC METHODS - EXCURSION (6.0L DIESEL) .
Is P1000 cleared?
Yes No No issue, DTC P1000 cleared. GO to AC3. - AC3 VERIFY CERTAIN OPERATING CONDITIONS HAVE BEEN SATISFIED
- Key ON, engine OFF.
- Monitor the EOT, VPWR and GPTCM PIDs. 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%.
- Monitor the MFDES and RPM PIDs 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.
- Monitor the MFDES PID at idle with the vehicle at normal operating temperature. The MFDES must be less than 12 mg/stroke for at least 12 seconds.
With the above conditions met, is P1000 cleared?
Yes No No issue, DTC P1000 cleared. REFER to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL . CARRY OUT the Diagnostic Subroutines to determine the DTC clearing issue.