TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, check for other transmission DTC’s
If any of these DTC’s are present, perform their respective tests first.
Are DTC’s P1791, P0715, P0720, P1794, P1720, P1721, P1722, or P1724 present
also?
45RFE AUTO
TRANS
Yes
→
Refer to appropriate symptom in the Transmission category. If
any of these codes are present, they will cause a speed ratio error.
Go to test for P-1791 first if it is present.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
No
→
Go To
3
3
With the DRBIII
t, perform the 2C Gear Clutch Test. Follow the instructions on the
DRBIII
t for test.
With the DRBIII
t, perform the 3C Gear Clutch Test. Follow the instructions on the
DRBIII
t for the test.
NOTE: You must test the 2C and 3C clutches to verify 4th Prime operation.
Increase the throttle angle (TPS Degree) to 30° for no more than a few seconds for
each Gear tested.
CAUTION: Do not overheat the transmission.
NOTE: No DTC’s will be set while using the DRBIII
t to perform a clutch test.
Did both clutch test pass (Input speed remains at zero)?
45RFE AUTO
TRANS
Yes
→
Go To
4
No
→
Go To
5
4
The conditions to set this code are not currently present.
Check the gearshift linkage adjustment.
Intermittent gear ratio codes can be set by problems in the Input and Output Speed
Sensor circuits and/or Speed Sensor Ground circuit.
Check the speed sensor wiring and connectors for good connection, then perform a
wiggle test using the Transmission Simulator (Miller tool # 8333).
Gear ratio DTC’s can also be set under extreme temperature conditions, this is
usually caused by an internal problem.
Ask the customer if the problem is only experienced under extreme hot or cold
conditions.
45RFE AUTO
TRANS
Yes - Repair internal transmission.
Test Complete.
No - Repair wiring as necessary.
Repair as necessary.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
5
If there are no possible causes remaining, view repair.
45RFE AUTO
TRANS
Repair
Repair internal transmission problem per current warranty pol-
icy. If the transmission is to be repaired, and any line pressure
DTC’s are present along with this DTC, make sure to inspect the
pump and Pressure Control Solenoid per service information.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
63
TRANSMISSION
P0735-GEAR RATIO ERROR 4TH PRIME —
Continued