TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, read transmission DTC’s
Is DTC P0750 present?
45RFE AUTO
TRANS
Yes
→
Refer to symptom P0750 in the Transmission category.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
3
3
With the DRBIII
t, Read and record DTC’s. After recording DTC’s, erase DTC’s.
Drive the vehicle until the transmission temperature is at least 43°Celsius 110°F.
Perform the following steps 3 times.
Drive the vehicle at 80 km/h 50 MPH.
Allow 4th gear to engage for at least 10 seconds.
Close the Throttle.
Tip back into the throttle until the TPS angle is between 25 and 29 degrees.
NOTE: If the throttle angle goes over 30 degrees, you must close the throttle
and try again.
Did the TCC engage during any of the attempts? (Engine speed approximately equal
to input speed)
45RFE AUTO
TRANS
Yes
→
Go To
4
No
→
Go To
5
4
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 any problems found?
45RFE AUTO
TRANS
Yes
→
Repair as necessary.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Test Complete.
5
Check the transmission fluid level per the service information.
Note: The transmission must be hot when checking oil level. When the
temperature is below 10 degrees C (50 degrees F). it is possible that no oil
will show on the dipstick, even though the transmission has an adequate fill
level when warm.
Is the fluid level OK?
45RFE AUTO
TRANS
Yes
→
Go To
6
No
→
NOTE: Low fluid level can be the cause of many transmission
problems. If the fluid level is low locate and repair the leak then
check and adjust the fluid level per the service information.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
6
With the DRBIII
t, check for other transmission DTC’s.
Are codes P1775 and P1784 present also?
45RFE AUTO
TRANS
Yes
→
Replace the Transmission Solenoid/TRS assembly.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
7
67
TRANSMISSION
P0740-TORQUE CONVERTER CLUTCH CONTROL CIRCUIT —
Continued