Hummer H2. Manual — part 2437

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 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

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 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

9

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

10

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

11

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

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

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

15

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

-

16

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

17

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

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 3-2 SS valve assembly.
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.

2004 Hummer H2

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

DTC P0894

21

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

2 downshift. Ensure that the following
conditions are met:

z

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

z

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

z

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

22

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