P1784

Test 455 - 458:

Test 459:

Symptom:
P1784-L-R PRESSURE SWITCH CIRCUIT

When Monitored:
Whenever the engine is running.

Set Condition:
The transmission uses pressures switches to monitor fluid pressure in L-R, 2-4, and O/D elements. The pressure switches are continuously monitored for correct states in each gear. If and error is detected the code will set.

POSSIBLE CAUSES
CHECKING SYMPTOMS AND POSSIBLE CAUSES
LOW BATTERY VOLTAGE CAUSING SYMPTOM
INTERMITTENT CODE P1784

Test 158 - 162:

Test 163 - 166:

Test 167 - 170:

POSSIBLE CAUSES
TRANSAXLE DEFECTIVE
L-R PRESS SW SENSE CKT SHORTED TO TCR OUTPUT CKT
L-R PRESSURE SWITCH OPEN
L-R PRESSURE SWITCH SENSE CKT OPEN BETWEEN SOLENOID PACK AND TCM CONNECTORS
L-R PRESSURE SWITCH SENSE SHORTED TO GROUND
SOLENOID SWITCH VALVE STUCK IN LOCK UP POSITION
VALVE BODY BOLT TORQUES OUT OF SPECIFICATION
L-R PRESSURE SENSE DEFECTIVE
TCM L-R PRESSURE SENSE INTERNAL SHORT TO GROUND
L-R PRESSURE SWITCH DEFECTIVE
L-R SOLENOID DEFECTIVE (LOCK UP)
SOLENOID PACK CAUSING L-R PRESSURE SWITCH CIRCUIT CODE