DTC P0722: STALL SPEED MONITORING
Bosch GS8.87 EAT DTC P0722
Description
DTC P0722
Stall Speed Monitoring
Possible Causes
Connectors C243, EAT C193. See 1 under CHECK.
Open circuit shaft speed sensor C193/14 (B) to C193/42 (R). See 2 under CHECK.
Open circuit C243/E (K) to C193/42 (R). See 3 under CHECK.
Open circuit C243/F (B) to C193/14 (B). See 4 under CHECK.
Shaft speed electrical interference. See 5 under CHECK.
Shaft speed sensor fault. See 6 under CHECK.
Torque converter mechanical fault. See 7 under CHECK.
Check
Connectors C243, EAT C193
CONNECTOR
Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
Open Circuit Shaft Speed Sensor C193/14 (B) To C193/42 (R)
OPEN_CIRCUIT
Check resistance less than 1 M/ohm.
Open Circuit C243/E (K) To C193/42 (R)
OPEN_CIRCUIT
Check resistance less than 1 M/ohm.
Open Circuit C243/F (B) To C193/14 (B)
OPEN_CIRCUIT
Check resistance less than 1 M/ohm.
Shaft Speed Electrical Interference
CHECK THE FOLLOWING
NOTE:Use Live Data reading to display the output shaft speed as measured by the transmission ECU.
With the engine running and the position switch in "P" the shaft speed should measure 0 RPM.
If the reading is not 0 RPM then there may be a problem with electrical interference.
Check the connections to the screen around the output shaft sensor wiring.
POSSIBLE FAULTS
Faulty output shaft sensor wiring.
Faulty output shaft sensor.
Shaft Speed Sensor Fault
CHECK THE FOLLOWING
NOTE:Use Live Data reading to display the output shaft speed as measured by the transmission ECU.
Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road.
The two readings should maintain the same ratio. If one reading doubles so should the other reading.
If the readings do not maintain a fixed ratio the output shaft sensor may be faulty.
POSSIBLE FAULTS
Faulty output shaft sensor.
Torque Converter Mechanical Fault
CHECK THE FOLLOWING
NOTE:Use Live Data reading to display the output shaft speed as measured by the transmission ECU.
Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road.
The two readings should maintain the same ratio. If one reading doubles so should the other reading.
If the readings maintain a fixed ratio the torque converter may be faulty.
POSSIBLE FAULTS
Transmission torque converter mechanical fault.
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Friday, November 27th, 2009 AT 9:17 AM
