TEST
ACTION
APPLICABILITY
2
Engine Running. Shift lever in park.
With the DRBIII
t, read the Transmission Output and Input Speed Sensor states.
Is the Output Speed Sensor reading twice the Input Speed Sensor reading?
45RFE AUTO
TRANS
Yes
→
Go To
4
No
→
Go To
3
3
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wires while checking for shorts and open circuits.
Were there any problems found?
45RFE AUTO
TRANS
Yes
→
Repair as necessary.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
4
4
Turn the ignition off to the lock position.
Remove the Starter Relay.
NOTE: Failure to remove 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 Transmission Simulator, set the rotary knob to the 3000/1000 position. Turn
the Input/Output switch on.
With the DRBIII
t, monitor the Input and Output Speed Sensor state.
Does the input speed read 3000 RPM and the Output speed read 1000 RPM, within
50 RPM?
45RFE AUTO
TRANS
Yes
→
Test Complete.
No
→
Go To
5
5
Turn the ignition off to the lock position.
Disconnect the Transmission Control Module harness connector.
Disconnect the Input Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Speed Sensor Ground circuit from the Transmission
Control Module harness connector to the Input Speed Sensor harness connector.
Is the resistance above 5.0 ohms?
45RFE AUTO
TRANS
Yes
→
Repair the Input Speed Sensor Ground circuit for an open.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
6
203
TRANSMISSION
P1794-SPEED SENSOR GROUND ERROR —
Continued