Hummer H1 Service Manual page 254

____________________________________________
®
DTC P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance
Step
1 Was the Powertrain ON-Board Diagnostic (OBD) System
Check performed?
2 Perform the A/T Fluid Checking Procedure.
Did you perform the fluid checking procedure?
3
1. Install the scan tool (Tech 1).
2. With the engine OFF, turn the ignition switch to the
RUN position.
Important: Before clearing the DTC's, use the scan tool in
order to record the Freeze Frame and Failure Records for
reference. The Clear Info function will erase the stored data.
3. Record the DTC Freeze Frame and Failure Records.
4. Select Trans. Fluid Temp on the scan tool.
5. Drive the vehicle and observe the scan tool for one of
the following conditions:
• No TFT change
• An unrealistic change (The TFT change is greater
than 36° F (20° C) 14 times in 7 seconds).
Did either of the fail conditions occur?
4 Did the scan tool display an unrealistic change condition?
5
1. Turn the ignition switch OFF.
6. Disconnect the transmission 20-way connector.
7. Install a 12 volt test lamp between terminal L and
terminal M of the engine side of the transmission 20-
way connector. Use the J– 35616-A Connector Test
Adapter Kit (Covered in Electrical Section 12)
8. Turn the ignition switch to the RUN position.
Does the scan tool Trans. Fluid Temp. display an unrealistic
change?
6
1. Record the scan tool TFT display from step 4.
2. Turn the ignition OFF.
3. Disconnect the transmission 20-way connector.
4. Turn the ignition switch to the RUN position.
Is the scan tool Trans. Fluid Temp. the same as in step 4?
7 Replace the PCM. Refer to Section 2.
Is the replacement complete?
8 Replace the A/T Wiring Harness Assembly. Refer to 4L80-E
Automatic Transmission ON-Vehicle Service.
Is the replacement complete?
05745159
Action
Transmission/Transfer Case
Value Yes
—
Go to Step 2
—
Go to Step 3
—
Go to Step 4
—
Go to Step 6
—
Go to Step 7
—
Go to Step 7
—
Go to Step 9
—
Go to Step 9
5-55
No
Go to Powertrain OBD
System Check
Go to Transmission
Fluid Checking Proce-
dure.
Fault not present at this
time. Refer to Diagnos-
tic Aids.
Go to Step 5
Go to Step 8
Go to Step 8
—
—