Hummer H2. Manual — part 2428
Inline 20-Way Connector End View .
Does the resistance measure within the
specified range?
Go to Step 5
Go to Step 4
4
Does the resistance measure greater than the
specified value?
7 ohm
Go to Step 9
Go to Step 10
5
Measure the resistance from terminal C of the J
44152 to the transmission case.
Refer to Automatic Transmission Inline 20-
Way Connector End View .
Does the resistance measure greater than the
specified value?
250 K
ohm
Go to Step 6
Go to Step 11
6
1. Disconnect the J 44152 from the
transmission side of the AT inline 20-
way connector.
2. Reconnect the transmission AT inline 20-
way connector.
3. Disconnect the PCM connector C2.
4. Measure the resistance between PCM
connector terminal C2-6 and terminal
C2-8.
Does the resistance measure within the
specified range?
3-7
ohm
Go to Step 8
Go to Step 7
7
Does the resistance measure greater than the
specified value?
7 ohm
Go to Step 12
Go to Step 13
8
Using the DMM and the J 35616 , measure the
resistance from PCM connector terminal C2-6
to ground.
Does the resistance measure greater than the
specified value?
250 K
ohm
Go to Step 17
Go to Step 14
9
Test the high control circuit and the low control
circuit of the PC solenoid valve for an open
between the AT inline 20-way connector and
the PC solenoid valve.
Refer to Testing for Continuity in Wiring
Systems.
Did you find an open condition?
-
Go to Step 16
Go to Step 15
10
Test the high control circuit and the low control
circuit of the PC solenoid valve for a shorted
together condition between the AT inline 20-
way connector and the PC solenoid valve.
Refer to Circuit Testing in Wiring Systems.
Did you find a shorted together condition?
-
Go to Step 16
Go to Step 15
Test the high control circuit and the low control
2004 Hummer H2
2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2
11
circuit of the PC solenoid valve for a short to
ground between the AT inline 20-way
connector and the PC solenoid valve.
Refer to Testing for Short to Ground in
Wiring Systems.
Did you find a short to ground condition?
-
Go to Step 16
Go to Step 15
12
Test the high control circuit and the low control
circuit of the PC solenoid valve for an open
between the PCM connector C2 and the AT
inline 20-way connector.
Refer to Testing for Continuity and extxref
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Systems.
Did you find and correct the condition?
-
Go to Step 19
-
13
Test the high control circuit and the low control
circuit of the PC solenoid valve for a shorted
together condition between the PCM connector
C2 and the AT inline 20-way connector.
Refer to Circuit Testing and extxref
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extrefid="i162420"> Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?
-
Go to Step 19
-
14
Test the high control circuit and the low control
circuit of the PC solenoid 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 19
-
15
Replace the PC solenoid valve.
Refer to Valve Body and Pressure Switch
Replacement .
Did you complete the replacement?
-
Go to Step 19
-
16
Replace the AT wiring harness assembly.
Refer to Valve Body and Pressure Switch
Replacement .
Did you complete the replacement?
-
Go to Step 19
-
17
Test the high control circuit and the low control
circuit of the PC solenoid for a short to voltage.
Refer to Testing for a Short to Voltage and
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-
2004 Hummer H2
2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2
DTC P0751
Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 19
Go to Step 18
18
Replace the PCM.
Refer to Powertrain Control Module (PCM)
Replacement in Engine Controls - 6.0L (LQ4).
Did you complete the replacement?
-
Go to Step 19
-
19
Perform the following procedure in order to
verify the repair:
1. Select DTC.
2. Select Clear Info.
3. Start the engine and ensure that the
following condition is met:
The difference between the scan tool PC
Sol. Actual Current and the PC Sol. Ref.
Current is less than 0.16 amp.
4. Select Specific DTC.
5. Enter DTC P0748.
Has the test run and passed?
-
Go to Step 20
Go to Step 2
20
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
Fig. 14: 1-2 Shift Solenoid (SS) & 2-3 Shift Solenoid (SS) Valve Fluid Diagram
Courtesy of GENERAL MOTORS CORP.
Circuit Description
The 1-2 shift solenoid (SS) valve controls the fluid flow acting on the 1-2 and 3-4 shift valves. The 1-2 SS valve
is a normally-open exhaust valve that is used with the 2-3 SS valve, in order to allow four different shifting
combinations
When the PCM detects a 2-2-3-3 shift pattern, then DTC P0751 sets. DTC P0751 is a type B DTC.
Conditions for Running the DTC
z
No TP sensor DTCs P0122 or P0123.
z
No VSS assembly DTCs P0502 or P0503.
z
No TCC solenoid valve DTC P0740.
z
No TCC stuck ON DTC P0742.
z
No 1-2 SS valve DTC P0753.
z
No 2-3 SS valve DTC P0758.
z
No 3-2 SS valve assembly DTC P0785.
z
No TFP manual valve position switch DTC P1810.
z
No TCC PWM solenoid valve DTC P2761.
z
The engine speed is greater than 450 RPM for 5 seconds.
2004 Hummer H2
2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2
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