TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, check for other transmission DTC’s
Is DTC P1784 Present also?
45RFE AUTO
TRANS
Yes
→
Refer to symptom list and perform test for DTC P1784.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
3
3
Perform a visual inspection of all connectors, wiring, and cooler connections before
proceeding. Repair as necessary.
Check the transmission fluid level per service information. Adjust if necessary.
With the DRBIII
t, Check the STARTS SINCE SET counter.
Note: This counter only applies to the last code set.
Is the STARTS SINCE SET counter 2 or less?
45RFE AUTO
TRANS
Yes
→
Go To
4
No
→
Go To
12
4
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.
Place pressure switch selector on L/R and observe L/R Pressure Switch state on the
DRBIII
t screen while pressing the pressure switch test button.
Did the pressure switch state change from open to closed when the switch was
pressed?
45RFE AUTO
TRANS
Yes
→
Go To
5
No
→
Go To
7
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
→
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
If there are no possible causes remaining, view repair.
45RFE AUTO
TRANS
Repair
Repair internal transmission problem as necessary. If the trans-
mission is to be repaired, inspect the Solenoid Switch Valve per
the service information and repair or replace as necessary. If no
problems are found, replace the Solenoid/TRS assembly.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
175
TRANSMISSION
P1776-SOLENOID SWITCH VALVE LATCHED IN LR POSITION —
Continued