GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 SRX 🢒 Transmission 🢒 Automatic Transmission - 5L40-E/5L50-E 🢒 DTC P0761 or P0762

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0761: 4-5 Shift Solenoid (SS) Valve Performance - No Fourth Gear

DTC P0762: 4-5 Shift Solenoid (SS) Valve Performance - No Fifth Gear

Circuit/System Description

The 4-5 shift solenoid (SS) valve is a normally-closed exhaust valve. When the 1-2 and the 2-3 SS valves are both OFF, the 4-5 SS valve turns off to shift the transmission into 5th gear. When either of the other two shift solenoids are ON, the 4-5 SS allows powertrain braking. The 4-5 SS valve is attached to the control valve body, within the transmission.

Conditions for Running the DTC
    • No TP sensor DTC P0120.
    • No ISS DTCs P0716 or P0717.
    • No OSS DTCs P0722 or P0723.
    • No TCC stuck ON DTC P0742.
    • No shift solenoid electrical DTCs P0973, P0974, P0976, P0977, P0979, or P0980.
    • No IMS DTCs P182A, P182C, P182D, P182E, P182F or P1915.
    • No engine torque delivered signal DTC P2637.
    • The engine run time is greater than 5 seconds.
    • The IMS range is not PARK, NEUTRAL or REVERSE.
    • The transmission fluid temperature is 20-130°C (68-266°F).
    • The throttle position is 10 percent or more.
    • The input shaft speed is 200-6,800 RPM.
    • The output shaft speed is 100 RPM or more.
    • The engine torque is greater than 36 N·m (26.5 lb ft).

Conditions for Setting the DTC

P0761

The TCM commands 4th gear and the resulting gear ratio is 0.73:1-0.77:1 for 4 seconds twice during the same trip.

P0762

The following conditions must occur twice during the same trip:

    • The transmission control module (TCM) has commanded either 2nd or 3rd gear for 3 seconds or greater.
    • The TCM commands 5th gear and the resulting gear ratio is 0.98:1-1.03:1 for 3.5 seconds.

Action Taken When the DTC Sets

P0761

    • DTC P0761 is a Type B DTC.
    • The TCM commands maximum line pressure.
    • The TCM freezes transmission adaptive functions.
    • The TCM inhibits Autograde braking.
    • The TCM inhibits Powertrain braking.
    • The TCM inhibits TAP shift operation.

P0762

    • DTC P0762 is a Type B DTC.
    • The TCM commands maximum line pressure.
    • The TCM freezes transmission adaptive functions.
    • The TCM inhibits Powertrain braking.
    • The TCM inhibits TAP shift operation.

Conditions for Clearing the DTC

DTCs P0761 and P0762 are Type B DTCs.

Diagnostic Aids

If the DTC is cleared, then will not reset when the vehicle is driven, some of the following conditions may exist:

    • Fluid contamination
    • Plugged fluid circuits
    • Restricted fluid circuits
    • Refer to Shift Solenoid Valve State and Gear Ratio.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Transmission General Description

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Transmission Control Module Scan Tool Information

Circuit/System Verification
  1. Perform the Transmission Fluid Check to verify correct fluid level and condition. The transmission fluid level should be within the crosshatch band and the transmission fluid should be red or dark brown.
    2. ⇒If the transmission fluid is low or discolored, refer to Automatic Transmission Fluid and Filter Replacement.
  2. Operate the vehicle in Drive and ensure that the TCM commands all gears. The ratios should match the commanded gear for all gears. Refer to Shift Solenoid Valve State and Gear Ratio.
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Using the scan tool, clear the DTC. If DTC is set, drive the vehicle in D5 and ensure that the TCM commands all gears with a throttle angle of 10 percent or greater. The ratios should match the commanded gear for all gears. Refer to Shift Solenoid Valve State and Gear Ratio.

⇒If the gear ratios do not match the commanded gear, inspect the following and repair or replace as necessary:
    • The 4-5 shift solenoid valve mechanically stuck OFF or ON. Refer to Shift Solenoid Leak Test.
    • The 4-5 shift valve O-ring worn or damaged.
    • The 4-5 shift valve in the applied or released position. Refer to 4-5 Shift Solenoid Valve Replacement.

Component Testing

Disconnect the wiring harness connector from the affected solenoid. Measure the resistance for the affected solenoid. The resistance should be between 15-20.3 ohms for the 4-5 SS.

⇒If the resistance is not within the specified range, replace the affected solenoid.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

    •  Automatic Transmission Fluid and Filter Replacement
    •  Shift Solenoid Valve State and Gear Ratio
    •  Shift Solenoid Leak Test
    •  4-5 Shift Solenoid Valve Replacement