HOLDEN GEN III V8, Обучение по обслуживанию

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GEN III V8 ENGINE MANAGEMENT
A failure in the Vehicle Speed Sensor or Circuit will set on of the following DTCs:
DTC P0502 Vehicle Speed Sensor Circuit Low Input
Conditions for running DTC P0502
• No MAP sensor DTCs P0107 or P0108.
• No Throttle Position DTCs P0122 or P0123.
No TFP manual valve position switch DTC P1810.
• The transmission is not in park or neutral.
The Throttle Position angle is greater than 15%.
• The engine vacuum is 0-105 kPa.
'• The engine speed is greater than 3000 RPM.
The engine torque is between 40 - 543 Nm.
Conditions for setting DTC P0502
• The transmission output speed is less than 150 RPM for at least three seconds.
Action taken when DTC P0502 Sets
• The PCM does not illuminate the Check Powertrain Lamp.
• The PCM commands first gear only.
• The PCM commands maximum line pressure.
• The PCM inhibits TCC engagement.
• The PCM freezes shift adapts from being updated.
• 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 DTC P0502
• A last test failed (current DTC) clears after one ignition cycle that the diagnostic runs and does not fail.
DTC P0503 Vehicle Speed Sensor Circuit Intermittent
Conditions for running DTC P0503
• No TFP manual valve position switch DTC P 1 8 1 0 .
• The time since the last gear range change is greater than six seconds.
• The engine speed is greater than 300 RPM for five seconds.
• The engine is not in fuel cutoff.
• The transmission output speed rise does not exceed 600 RPM within six seconds.
Conditions for setting DTC P0503
• The transmission output speed drop is greater than 1300 RPM for three seconds when the transmission is
not in park or neutral.
Action taken when DTC P0503 Sets
• The PCM does not illuminate the Check Powertrain Lamp.
• The PCM commands second gear only.
• The PCM commands maximum line pressure.
• The PCM inhibits TCC engagement.
• The PCM inhibits 4th gear if the transmission is in hot mode.
• The PCM freezes shift adapts from being updated.
• 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 DTC P0503
• A last test failed (current DTC) clears after one ignition cycle that the diagnostic runs and does not fail.
GEN III V8 ENGINE MANAGEMENT Page • 63