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Hummer H2. Manual - part 2437

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 S of the J 44152 .

Refer to Automatic Transmission Inline 20-
Way Connector End View .

2. Use the scan tool in order to command the 3-2

SS valve assembly 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 and the J 35616 , measure the

resistance between the terminal E and terminal
S of the J 44152 .

Refer to Automatic Transmission Inline 20-
Way Connector End View .

Does the resistance measure within the specified
range?

20-32

ohm

Go to Step 9

Go to Step 10

1. Measure the resistance from terminal S to

ground.

2. Measure the resistance from terminal E to

ground.

250 K

ohm

Go to

Intermittent

Conditions in

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

Do both readings measure greater than the specified
value?

Engine Controls -

6.0L (LQ4)

Go to Step 11

1. Disconnect the AT wiring harness assembly

from the 3-2 SS valve assembly.

2. Measure the resistance of the 3-2 SS valve

assembly.

Does the resistance measure within the specified
range?

20-32

ohm

Go to Step 18

Go to Step 19

1. Disconnect the AT wiring harness assembly

from the 3-2 SS valve assembly.

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 3-2 SS valve

assembly 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 3-2 SS valve
assembly for a short to ground between the AT inline
20-way connector and the 3-2 SS valve
assembly.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.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

Did you complete the replacement?

Go to Step 21

Test the Ignition 0 voltage circuit of the 3-2 SS valve
assembly 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?

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

Test the control circuit of the 3-2 SS valve assembly
for a short to ground between the PCM connector C1
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 3-2 SS valve assembly
for an open or short to voltage between the PCM
connector C1 and the AT inline 20-way connector.
Refer to Circuit Testing 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 3-2 SS valve assembly.
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.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

DTC P0894

3. Drive the vehicle in D3 or D4 and perform a 3-

2 downshift. Ensure that the following
conditions are met:

The PCM commands the 3-2 SS valve
assembly ON, and the voltage feedback
drops to zero.

The PCM commands the 3-2 SS valve
assembly OFF, and the voltage feedback
increases to B+.

All conditions are met for 5 seconds.

4. Select Specific DTC.

5. Enter DTC P0785.

Has the test run and passed?

Go to Step 22

Go to Step 2

With the scan tool, observe the stored information,
capture info, and DTC Info.
Does the scan tool display any DTCs that you have
not diagnosed?

Go to Diagnostic

Trouble Code

(DTC) List in

Engine Controls -

6.0L (LQ4)

System OK

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

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