Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the Powertrain On-Board Diagnostic (OBD) System Check
performed?
| --
|
Go to Step
2
| Go to
Powertrain On Board Diagnostic (OBD) System Check
|
2
|
- Install the Scan Tool
.
- With the engine OFF, turn the ignition switch to the RUN position.
Important: Before clearing the DTCs, use the scan tool in order to record the Freeze
Frame and Failure Records. Using the Clear Info function erases the Freeze
Frame and Failure Records from the PCM.
- Record the Freeze Frame and Failure Records.
- Clear the DTC.
- Select TFP switch A/B/C on the scan tool.
- With the engine operating, apply the brake pedal, and select each
transmission range: D1, D2, D3, D4, N, R, and P.
Refer to the
Range Signal
table.
Does each selected transmission range match the scan tool TFP switch
A/B/C display?
| --
|
Go to Step 3
| Go to
DTC P1810 TFP Valve Position Switch Invalid Range
|
3
|
- Raise and support the drive axle assembly.
- Start the engine.
- With the transmission in D4 range, use the scan tool in order
to command first, second, third, and fourth gears while accelerating the vehicle.
Was a 2-2-3-3 shift pattern detected? (You may need to road test the
vehicle).
| --
|
Go to Step
4
| Go to Diagnostic Aids
|
4
|
- Inspect the shift solenoid/hydraulic circuits for a 1-2 or 3-4
SS valve internal malfunction.
- Inspect the shift solenoid/hydraulic circuit for damaged seals
on one or both of the shift solenoids.
- Refer to
Symptom Diagnosis
.
Was the condition corrected?
| --
|
Go to Step
5
| --
|
5
| Perform the following procedure
in order to verify the repair:
- Select DTC.
- Select Clear Info.
- Operate the vehicle under the following conditions (if traffic
and road conditions permit):
• | Place the transmission in D4. |
• | Hold the throttle greater than 10%, and accelerate to 55 mph. |
• | The PCM must see the proper gear ratio for each commanded gear,
for greater than one second in D1, D2, D3, and D4 with TCC locked. |
- Select Specific DTC.
- Enter DTC P0751.
Has the test run and passed?
| --
| System OK
|
Go to Step 1
|