P1781

Test 1 Through 2:

Test 3 Through 6:

Test 7 Through 11:

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.

Set Condition:The appropriate code is set if one of the pressure switches are open or closed at the wrong time in a given gear.

POSSIBLE CAUSES:
RELATED RELAY DTC'S PRESENT
INTERMITTENT WIRING & CONNECTORS CONDITIONS
TRANSMISSION RELAY OUTPUT CIRCUIT OPEN
OD PRESSURE SWITCH SENSE CIRCUIT OPEN
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
PRESSURE SWITCH INOPERATIVE
TCM- (OD PRESSURE SWITCH)