Hummer H2. Manual — part 2435
assembly.
5: This step tests for power to the 2-3 SS valve from the ignition through the fuse.
6: This step tests the ability of the PCM and of the wiring to control the ground circuit.
8: This step measures the resistance of the AT wiring harness assembly and of the 2-3 SS valve.
DTC P0758
Step
Action
Value
(s)
Yes
No
1
Did you perform the Diagnostic System Check -
Engine Controls?
-
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
in Engine
Controls - 6.0L
(LQ4)
2
1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Record the DTC Freeze Frame and Failure
Records.
4. Clear the DTC.
Are any of the following DTCs also set?
z
P0740
z
P0753
z
P0785
z
P2761
IMPORTANT:
Before clearing the DTC, 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.
-
Go to Step 3
Go to Step 4
3
Inspect the IGN 0 fuse for an open.
Refer to Circuit Protection - Fuses in Wiring
Systems.
Is the fuse open?
-
Go to Step 12
Go to Step 5
4
Use the scan tool in order to command the 2-3 SS
valve ON and OFF three times while listening to the
bottom of the transmission pan, a stethoscope may be
necessary.
Does the solenoid click when commanded?
-
Go to
Intermittent
Conditions in
Engine Controls -
6.0L (LQ4)
Go to Step 5
2004 Hummer H2
2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2
5
1. Turn OFF the ignition.
2. Disconnect the AT inline 20-way connector,
additional DTCs may set.
3. Install the J 44152 Jumper Harness (20 pins)
on the engine side of the AT inline 20-way
connector.
4. Turn ON the ignition, with the engine OFF.
5. Using the J 35616 GM Terminal Test Kit,
connect a test lamp from terminal E of the J
44152 to ground.
Refer to Automatic Transmission Inline 20-
Way Connector End View .
Does the test lamp illuminate?
-
Go to Step 6
Go to Step 15
6
1. Connect a test lamp between terminal E and
terminal B of the J 44152 .
Refer to Automatic Transmission Inline 20-
Way Connector End View .
2. Use the scan tool in order to command the 2-3
SS valve ON and OFF three times.
Does the test lamp turn ON and OFF with each
command?
-
Go to Step 8
Go to Step 7
7
Is the test lamp always ON?
-
Go to Step 16
Go to Step 17
8
1. Install the J 44152 on the transmission side of
the AT inline 20-way connector.
2. Using the DMM andJ 35616 , measure the
resistance between terminal B and terminal E
of the J 44152 .
Refer to Automatic Transmission Inline 20-
Way Connector End View .
Does the resistance measure within the specified
range?
19-31
ohm
Go to Step 9
Go to Step 10
9
Measure the resistance from terminal B to ground,
and from terminal E to ground.
Do both readings measure greater than the specified
value?
250 K
ohm
Go to
Intermittent
Conditions in
Engine Controls -
6.0L (LQ4)
Go to Step 11
2004 Hummer H2
2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2
10
1. Disconnect the AT wiring harness assembly
from the 2-3 SS valve.
2. Measure the resistance of the 2-3 SS valve.
Does the resistance measure within the specified
range?
19-31
ohm
Go to Step 18
Go to Step 19
11
1. Disconnect the AT wiring harness assembly
from the 2-3 SS valve.
2. Measure the resistance from the component's
terminals to ground.
Do both readings measure greater than the specified
value?
250 K
ohm
Go to Step 18
Go to Step 19
12 Test the Ignition 0 voltage circuit of the 2-3 SS valve
for a short to ground between the fuse block and the
AT inline 20-way connector.Refer to Testing for
Short to Ground and extxref document="029_body-
21" filetype="sgml" extrefid="i162420">Wiring
Repairs in Wiring Systems.Did you find and correct
the condition?
IMPORTANT:
The condition that affects this circuit may exist in
other connecting branches of the circuit. Refer to
Power Distribution Schematics in Wiring Systems
for complete circuit distribution.
-
Go to Step 21
Go to Step 13
13
Test the Ignition 1 voltage circuit of the 2-3 SS valve
for a short to ground between the AT inline 20-way
connector and the 2-3 SS valve.Refer to Testing for
Short to Ground in Wiring Systems.Did you find a
short to ground condition?
IMPORTANT:
The condition that affects this circuit may exist in
other connecting branches of the circuit. Refer to
Power Distribution Schematics in Wiring Systems
for complete circuit distribution.
-
Go to Step 18
Go to Step 14
14
1. Test each solenoid for a short to ground.
2. Replace the faulty solenoid as necessary.
Did you complete the replacement?
-
Go to Step 21
-
IMPORTANT:
The condition that affects this circuit may exist in
other connecting branches of the circuit. Refer to
2004 Hummer H2
2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2
15
Test the Ignition 0 voltage circuit of the 2-3 SS valve
for an open.Refer to Testing for Continuity and
extxref document="029_body-21" filetype="sgml"
extrefid="i162420">Wiring Repairs in Wiring
Systems.Did you find and correct the condition?
Power Distribution Schematics in Wiring Systems
for complete circuit distribution.
-
Go to Step 21
-
16
Test the control circuit of the 2-3 SS valve for a short
to ground between the PCM connector C2 and the AT
inline 20-way connector.
Refer to Testing for Short to Ground and extxref
document="029_body-21" filetype="sgml"
extrefid="i162420">Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?
-
Go to Step 21
Go to Step 20
17
Test the control circuit of the 2-3 SS valve for an
open or short to power between the PCM connector
C2 and the AT inline 20-way connector.
Refer to Testing for a Short to Voltage and extxref
document="029_body-21" filetype="sgml"
extrefid="i162420">Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?
-
Go to Step 21
Go to Step 20
18
Replace the AT wiring harness assembly.
Refer to Valve Body and Pressure Switch
Replacement .
Did you complete the replacement?
-
Go to Step 21
-
19
Replace the 2-3 SS valve.
Refer to Valve Body and Pressure Switch
Replacement .
Did you complete the replacement?
-
Go to Step 21
-
20
Replace the PCM.
Refer to Powertrain Control Module (PCM)
Replacement in Engine Controls - 6.0L (LQ4).
Did you complete the replacement?
-
Go to Step 21
-
Perform the following procedure in order to verify the
repair:
1. Select DTC.
2. Select Clear Info.
3. Drive the vehicle in D4 and ensure the
following conditions are met:
z
The PCM commands the 2-3 SS valve
ON and the voltage feedback drops to
2004 Hummer H2
2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2
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