TEST
ACTION
APPLICABILITY
5
Ignition on, engine not running.
With the DRBIII
t, monitor Line Pressure.
Firmly push the Line Pressure sensor connector towards the Transmission.
Did the Actual Line Pressure change to about 30 PSI when the sensor connector was
pushed?
45RFE AUTO
TRANS
Yes
→
Disconnect and properly reconnect the Line Pressure Sensor
harness connector. Inspect terminals and repair as necessary.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
6
6
Turn the ignition off to the lock position.
Remove the Starter Relay.
NOTE: Failure to remove the Starter Relay can cause a TCM - No Response
condition.
Install Transmission Simulator Miller tool #8333.
NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
With the DRBIII
t, monitor the Line Pressure voltage.
Using the Transmission Simulator, set the rotary knob to each of the 3 line pressure
positions.
Note: All three DRBIII
t Line Pressure sensor voltage readings should be within 0.25
volt of the voltage reading specified on Transmission Simulator.
Did the Line Pressure voltage remain steady while changing the knob position.
45RFE AUTO
TRANS
Yes
→
Go To
7
No
→
Go To
10
7
Turn the ignition off to the lock position.
Disconnect the Transmission Control Module harness connector.
Disconnect the Line Pressure Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the 5-volt Supply circuit from the Line Pressure Sensor
harness connector to the Transmission Control Module harness connector.
Is the resistance above 5.0 ohms?
45RFE AUTO
TRANS
Yes
→
Repair the open 5-volt Supply circuit
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
8
8
Turn the ignition off to the lock position.
Disconnect the Transmission Control Module harness connector.
Disconnect the Line Pressure Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Line Pressure Sensor 5-volt Supply circuit and
ground.
Is the resistance Below 5.0 ohms?
45RFE AUTO
TRANS
Yes
→
Repair 5-volt Supply circuit for a short to ground.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
9
111
TRANSMISSION
P1726-UD HYDRAULIC PRESSURE TEST FAILURE —
Continued