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Hummer H2. Manual - part 2492

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

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)

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?

P0740

P0753

P0785

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

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

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

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

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

Is the test lamp always ON?

Go to Step 16

Go to Step 17

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

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

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

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

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

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

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

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

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

Replace the AT wiring harness assembly.
Refer to Valve Body and Pressure Switch
Replacement .
Did you complete the replacement?

Go to Step 21

Replace the 2-3 SS valve.
Refer to Valve Body and Pressure Switch
Replacement .
Did you complete the replacement?

Go to Step 21

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:

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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