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For 1990-2009 cars only
Makes 🢒 Holden 🢒 2005 🢒 Calais 🢒 DTC 🢒 DTC P0752

DTC P0752 V6

DTC Description

This diagnostic procedure supports DTC P0752 1-2 Shift Solenoid (SS) Valve Performance -- No Second or Third Gear.

Circuit Description

The 1-2 shift solenoid (SS) valve controls the fluid 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 transmission control module (TCM) detects a 1-1-4-4 shift pattern, then DTC P0752 sets. DTC P0752 is a Type B DTC

Refer to Automatic Transmission Controls Schematics , Automatic Transmission Inline 20-Way Connector End View , Automatic Transmission Internal Connector End Views , Automatic Transmission Control Module Connector End Views , and Automatic Transmission Related Connector End Views to aid in diagnosis.

Conditions for Running the DTC
    • No DTCs P0722, P0723, P0742, P0894, P0973, P0974, P0976, or P0977.
    • Ignition voltage is 8-18 V.
    • The engine run time is greater than 5 seconds.
    • The transmission fluid temperature is 20-130°C.
    • The throttle position is greater than 10 percent.
    • The output shaft speed is greater than 150 RPM.
    • The engine torque is 108-882 N·m.

Conditions for Setting the DTC

The TCM commands 2nd gear and the resulting gear ratio is 2.42:1 -- 2:52:1, 1st gear ratio for 2 second twice during the trip.

Action Taken When the DTC Sets
    • The TCM requests the ECM to illuminate the check powertrain icon during the second consecutive trip which the Conditions for Setting the DTC are met.
    • The TCM commands maximum line pressure.
    • The TCM freezes transmission adaptive functions.
    • The TCM inhibits 3-2 downshifts if the vehicle speed is greater than 40 km/h.
    • At the time of the first failure, the TCM records the operating conditions when the conditions for setting the DTC are met. The TCM stores this information as a Failure Record.
    • At the time of the second failure, the ECM records the operating conditions when the conditions for setting the DTC are met. The ECM stores this information as a Freeze Frame.
    • The TCM stores DTC P0752 in TCM history during the second consecutive trip in which the conditions for setting the DTC are met.

Conditions for Clearing the DTC
    • The ECM turns off the check powertrain icon after the fourth consecutive drive trip in which the TCM does not send a check powertrain icon illumination request.
    • Tech 2 can clear the DTC.
    • The TCM clears DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.
    • The TCM cancels the default actions when the ignition is off long enough in order to power down the TCM

Diagnostic Aids
    • If you clear DTC P0752, and then cannot rest DTC P0752, the following conditions may exist:
       - Fluid contamination
       - Blocked fluid circuits
       - Restricted fluid circuits
    • Refer to Shift Solenoid Valve State and Gear Ratio.

Test Description

The following numbers refer to the step numbers on the diagnostic table:

2 This step tests the TCM commanded all shifts, all shift solenoid valves responded correctly, and if all the shifts did not occur.

3 Checks the mechanical components that cause the DTC and their state.

Step

Action

Yes

No

1

Has the Diagnostic System Check been performed?

Go to Step 2

Refer to Diagnostic System Check - Automatic Transmission

2
  1. Connect Tech 2 to the DLC.
  2. Turn on the ignition, with the engine off.

    3. Important: Before clearing the DTC, use the Tech 2 Freeze Frame/Failure Record in order to record the transmission parameters at the time the DTC set. Using Tech 2 to clear the DTC(s) erases the Freeze Frame/Failure Record records from the TCM.

  3. On Tech 2 select:

    4. Transmission / Automatic Transmission / Diagnostic Trouble Codes / Freeze Frame.

  4. Select the relevant DTC and note the parameters at the time of the DTC setting.
  5. On Tech 2 select:

    6. Diagnostic Trouble Codes / Clear Engine and Transmission DTCs.

  6. Follow the instructions on Tech 2 and clear the DTCs.
  7. Drive the vehicle in D4 range under the following conditions:
    8. • Accelerate the vehicle
    • Ensure the TCM commands 1st, 2nd 3rd and 4th gears.

Did you detect a 1-1-4-4 shift pattern?

Go to Step 3

Refer to Diagnostic Aids within this Section

3

Inspect the shift solenoid/hydraulic circuit for the following conditions:

    • An internal malfunction
    • Damaged seals on the shift solenoid valve. Perform the shift solenoid leak test, refer to Shift Solenoid Leak Test.

Did you find and correct the condition?

Go to Step 4

--

4

Perform the following procedure in order to verify the repair:

  1. On Tech 2 select:

    2. Diagnostic Trouble Codes / Clear Engine & Transmission DTCs

  2. Follow the instructions on Tech 2 and clear any DTCs.
  3. Drive the vehicle in D4 range under the following conditions, only if traffic and road conditions permit:
    4. • Hold the throttle at 20%, and
    • Accelerate to 88 km/h.
  4. On Tech 2 select:

    5. Diagnostic Trouble Codes / Read DTC Information.

Has DTC P0752 set?

Go to Step 2

Go to Step 5

5

On Tech 2 select:

Diagnostic Trouble Codes / Read DTC Information.

Does Tech 2 display any DTCs you have not diagnosed?

Refer to Diagnostic Trouble Code (DTC) List/Type

System OK

When all diagnosis and repairs are completed, check the system for correct operation.