P1781

Test 521-525:

Test 526-529:

Test 530-533:

Test 534-538:

Test 539-541:

Test 542-543:

SYMPTOM:
P1781-OD PRESSURE SWITCH SENSE CIRCUIT

When Monitored and Set Condition:
P1781-OD PRESSURE SWITCH SENSE CIRCUIT
When Monitored: Whenever the engine is running. Engine speed must be greater than 500 RPM
Set Condition: A shift must not be in progress, and there must be more than 2.0 seconds since start-up, no loss of prime test in progress, and a pressure switch mismatch and the code sets within 4 seconds.

POSSIBLE CAUSES
- CHECKING SYMPTOMS AND POSSIBLE CAUSES
- LOW BATTERY VOLTAGE CAUSING SYMPTOM
- VALVE BODY BOLT TORQUES NOT WITHIN SPECIFICATIONS
- TRANSAXLE SEALS DEFECTIVE
- OD PRESSURE SWITCH DOES NOT TOGGLE
- TCM OD PRESSURE SWITCH SENSE INTERNAL SHORT TO GROUND
- OPEN BETWEEN TCM CONNECTOR AND INLINE CONNECTOR
- OD PRES SW SENSE CKT SHORT TO GND BTWN TCM AND INLINE
- OD PRESSURE SENSE SHORT TO SIGNAL AT SOLENOID PAC
- OD PRESSURE SWITCH SENSE CIRCUIT OPEN BETWEEN SOLENOID PACK AND INLINE
- OD PRESSURE SWITCH SENSE CIRCUIT SHORT AT INLINE CONNECTOR
- SHORT TO GROUND BETWEEN SOLENOID PACK AND INLINE CONNECTOR
- OD PRESSURE SENSE SHORT TO SIGNAL IN SOLENOID PACK
- OD PRESSURE SWITCH DEFECTIVE
- OD SOLENOID DEFECTIVE
- OD SOLENOID CAUSES OD PRESSURE SWITCH DTC
- SOLENOID PACK INTERNAL FAILURE
- INTERMITTENT CODE P1781