HOLDEN GEN III V8, Service Training

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GEN III V8 ENGINE MANAGEMENT
A failure in the Theft Deterrent System or Circuits will set one of the following DTCs:
DTC P1626 Theft Deterrent System Fuel Enable Circuit
Conditions for running DTC P1626
• The engine is cranking.
Conditions for setting DTC P1626
• The system has reached fuel enable decision point.
• The PCM is in Fail Enable Mode due to loss of communication with the PIM after the system received the
correct password earlier in the ignition cycle.
• The PCM does receive the password message from the PIM prior to the theft deterrent Fuel Decision Point.
Action taken when DTC P1626 Sets
• The PCM enables the fuel injection on future ignition cycles only if the PCM is in Fail-Enable Mode.
• The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails.
NOTE: This DTC is usually set if communication is lost. The Check Powertrain Lamp may not operate.
• The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information
in the Freeze Frame/Failure Records.
Conditions for clearing the Check Powertrain Lamp and DTC P1626
• A last test failed (Current DTC) will clear when the diagnostic runs and does not fail.
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