Hummer H1 Service Manual page 261

5-62 Transmission/Transfer Case
Step
1
Perform the transmission fluid checking procedure.
Was the fluid checking Procedure performed?
2 1. Install the scan tool.
2. With the engine "off," turn the ignition switch
"on."
Important: Before clearing DTC(s), use the scan tool
to record "Freeze Frame" and "Failure Records" for
reference, as data will be lost when the "Clear Info"
function is used.
3. Record the DTC "Freeze Frame" and "Failure
Records."
Does the scan tool display a "TFT Sensor" signal volt-
age less than shown in the value column?
3 1. Turn ignition "off."
2. Disconnect the transmission 20-way harness con-
nector.
3. Install the J– 39775 Jumper Harness on the engine
side of the 20-way connector.
4. Install a fused jumper wire from terminal "L" to
"M" on the engine harness.
5. Turn the ignition "on."
Does the "TFT Sensor" signal voltage drop to less than
indicated in the value column?
4 Turn ignition "off."
Install 05743837 Jumper Harness on the transmission
side of the 20-way connector.
Using the multimeter and Connector Test Adapter Kit,
measure the resistance between terminals L and M.
Is the resistance high?
5 1. Remove the transmission oil pan.
2. Check the internal wiring harness for an open.
Was a problem found?
6 1. Disconnect the internal wiring harness.
2. Measure the resistance of the TFT sensor.
Is the resistance high?
7 Replace the internal wiring harness.
Is the replacement complete?
8 Check circuit 359 for an open or short to B+.
Was a problem found?
9 Check circuit 923 for an open.
Was a problem found?
10
Check the PCM for faulty or intermittent connections.
Was a problem found?
_____________________________________________
DTC P0713 Fluid Temperature Low
Action Value Yes
—
Go to Step 2
4.92 volts
Go to Step 3
0.2 volts
Go to Step 5
—
Refer to Diag-
nostic Aids
—
Go to Step 12
__
Refer to Diag-
nostic Aids
__
Go to Step 12
__
Go to Step 12
__
Go to Step 12
__
Go to Step 12
®
No
—
Go to Diag-
nostic Aids
Go to Step 9
Go to Step 5
Go to Step 6
Go to Step 7
__
Go to Step 9
Go to Step 10
Go to Step 11