Hummer H1 Service Manual page 301

5-102 Transmission/Transfer Case
Step
4 1. Turn ignition "Off".
2. Disconnect transmission 20-way connector (addi-
tional DTCs will set).
3. Connect 05743837 Jumper Harness to engine har-
ness connector.
4. Stop engine, then turn the ignition switch to the
"Run" position.
5. Connect test light from 05743837 Jumper Harness
cavity "E" to ground.
Is test light "on?"
5 Repair open or short to ground in ignition feed circuit
to 2-3 shift solenoid valve.
Was a problem found and corrected?
6 1. Install a test lamp between cavity E and cavity B of
the jumper harness (0574837).
2. Using the transmission output control function on
the scan tool, command the 2-3 shift solenoid valve
"ON" and "OFF" three times.
Does the test lamp illuminate when the shift solenoid is
commanded "ON" and turn off when the shift solenoid
is commanded "OFF"?
7 Inspect circuit 315 (YL) for an open or short to ground.
Was an open or short to ground condition found?
8 Replace PCM.
Is the replacement complete?
9 1. Turn ignition off.
2. Connect 05743837 Jumper Harness to transmis-
sion 20-way connector.
3. With aDVOM and Connector Test Adapter Kit,
measure resistance between terminals "B" and "E."
Is resistance within the indicated values?
10 1. Disconnect the transmissions internal wiring har-
ness from the 2-3 shift solenoid.
2. With a DVOM measure the resistance the 2-3 shift
solenoid.
Is resistance within indicated values?
11 With a DVOM, measure resistance between terminals
"B" to ground and "E" to ground.
Are both readings greater than indicated value?
12 1. Disconnect the transmission internal wiring har-
ness from the 2-3 shift solenoid.
2. With a DVOM, measure the resistance from sole-
noid terminals to ground.
Are both readings greater than indicated value?
13 Replace the automatic transmission wiring harness
assembly.
Is the replacement complete?
3-1-01
DTC P0758 2-3 Shift Solenoid B Electrical (Cont'd)
Action
___________________________________________
Value
—
—
—
—
—
19-31 Ω
19-31 Ω
250K Ω
250K Ω
—
Yes No
Go to step 6. Go to step 5.
Go to step 15. —
Go to step 9. Go to step 7.
Go to step 15. Go to step 8.
Go to step 16. —
Go to step 11. Go to step 10.
Go to step 13. Go to step 14.
Go to Diag- Go to step 12.
nostic Aids
Go to step 13. Go to step 14
Go to step 13. —
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