HOLDEN GEN III V8, Обучение по обслуживанию

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GEN III V8 ENGINE MANAGEMENT
A failure in the Throttle Position Sensor or circuit will set one of the following DTCs:
DTC P0121 Throttle Position Sensor Circuit Insufficient Activity
Conditions for running DTC P0121
• No MAP sensor or TP sensor DTCs set
• The engine run time is greater than 1 0 seconds
• The engine coolant temperature is greater than 0°C
• The IAC is between 0 and 255 counts
• The MAP is less than 55 kPa
• OR
• The MAP is greater than 65 kPa
• MAP is steady
Conditions for setting DTC P0121
• The predicted throttle angle does not match the actual throttle angle
• All conditions are met for at least 20 seconds
Action taken when DTC P0121 Sets
• The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails
• 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 P0121
• The PCM turns the Check Powertrain Lamp OFF when the diagnostic runs and does not fail
• A last test failed (current DTC) clears when the diagnostic runs and does not fail
DTC P0122 Throttle Position Sensor Circuit Low Voltage
Conditions for running DTC P0122
• The ignition switch is ON or the engine is running
Conditions for setting DTC P0122
• The TP sensor signal voltage is less than 0 2 volts
Action taken when DTC P0122 Sets
• The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails
• The PCM records the operating conditions at the time the diagnostic fails The PCM stores this information
in the Freeze Frame/Failure Records
• The PCM uses a default TP sensor value
• The Transmission TCC will not apply
• High transmission line pressure
• Fixed transmission shift points, hard shifts and no fourth gear in hot mode
Conditions for clearing the Check Powertrain Lamp and DTC P0122
• The PCM turns the Check Powertrain Lamp OFF when the diagnostic runs and does not fail
• A last test failed (current DTC) clears when the diagnostic runs and does not fail
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