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Hummer H2. Manual - part 2431

The engine speed is greater than 450 RPM for 5 seconds.

The engine is not in fuel cutoff.

Conditions for Setting the DTC

DTC P0753 sets if one of the following conditions occurs for 5 seconds:

Condition 1

The PCM commands the solenoid ON and the voltage feedback remains high, B+.

Condition 2

The PCM commands the solenoid OFF and the voltage feedback remains low, 0 volts.

Action Taken When the DTC Sets

The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which
the Conditions for Setting the DTC are met.

The PCM commands D2 line pressure.

The PCM inhibits 3-2 downshifts if the vehicle speed is greater than 48 km/h (30 mph).

The PCM inhibits TCC engagement.

The PCM inhibits 4th gear in Hot Mode.

The PCM freezes transmission adapt functions.

The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM
stores this information as Freeze Frame and Failure Records.

The PCM stores DTC P0753 in PCM history during the second consecutive trip in which the Conditions
for Setting the DTC are met.

Conditions for Clearing the MIL/DTC

The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and
passes.

A scan tool can clear the MIL/DTC.

The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an
emission-related diagnostic fault occurring.

The PCM cancels the DTC default actions when the fault no longer exists and/or the ignition switch is
OFF long enough in order to power down the PCM.

Diagnostic Aids

Refer to the Shift Solenoid Valve State and Gear Ratio table.

Test Description

2004 Hummer H2

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

The numbers below refer to the step numbers on the diagnostic table.

4: This step tests the function of the 1-2 SS valve and the automatic transmission (AT) wiring harness
assembly.

5: This step tests for power to the 1-2 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 1-2 SS valve.

DTC P0753

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

P0758

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 1-2 SS
valve ON and OFF three times while listening to the
bottom of the transmission pan, a stethoscope may be

Go to

Intermittent

Conditions in

2004 Hummer H2

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

necessary.
Does the solenoid click when commanded?

Engine Controls -

6.0L (LQ4)

Go to Step 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

1. Connect a test lamp between terminal E and

terminal A of the J 44152 .

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

2. Use the scan tool in order to command the 1-2

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 and the J 35616 , measure the

resistance between terminal A 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 A 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 -

2004 Hummer H2

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

6.0L (LQ4)

Go to Step 11

1. Disconnect the AT wiring harness assembly

from the 1-2 SS valve.

2. Measure the resistance of the 1-2 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 1-2 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 1-2 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 1-2 SS valve
for a short to ground between the AT inline 20-way
connector and the 1-2 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

2004 Hummer H2

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

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