P1726

P1726 - UD HYDRAULIC PRESSURE TEST FAILURE

When Monitored and Set Condition:
P1726 - UD HYDRAULIC PRESSURE TEST FAILURE

When Monitored: In any forward gear with engine speed above 1000 RPM shortly after a shift and every minute thereafter.

Set Condition: After a shift into a forward gear, with engine speed above 1000 RPM, the TCM momentarily turns on element pressure to the clutch circuits don't have pressure to identify the correct pressure switch closes. If the pressure switch does not close 2 times the DTC sets.

POSSIBLE CAUSES:
TRANSMISSION RELAY OUTPUT CIRCUIT OPEN
UD PRESSURE SWITCH CIRCUIT SHORT TO GROUND
UD PRESSURE SWITCH SENSE CIRCUIT OPEN
UD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
RELATED LINE PRESSURE DTC'S PRESENT
RELATED SPEED RATIO AND/OR PRESSURE SWITCH DTC'S PRESENT
INTERMITTENT WIRING AND CONNECTORS
5-VOLT SUPPLY CIRCUIT OPEN
POOR LINE PRESSURE SENSOR CONNECTION
5-VOLT SUPPLY CIRCUIT SHORT TO GROUND
LINE PRESSURE SENSOR
TCM - NO 5 VOLTS - LOW LINE PRESSURE SENSOR
TCM - UD PRESSURE SWITCH