P0758

Diagnostic Chart (Part 1 Of 3):

Diagnostic Chart (Part 2 Of 3):

Diagnostic Chart (Part 3 Of 3):

Schematic:

Circuit Description with 4T40-E / 4T45-E Automatic Transaxle
The 2-3 shift solenoid (2-3 SS) valve is a normally-open exhaust valve that, in conjunction with the 1-2 shift solenoid (1-2 SS) valve, allows 4 different shifting combinations (Refer to the Shift Solenoid Valve State and Gear Ratio table). The 2-3 SS valve is attached to the control valve body, within the transmission.

The solenoid receives ignition voltage through the fused power feed circuit. The PCM commands the solenoid ON or OFF by providing a ground path.

When the PCM detects a continuous open, short to ground, or short to voltage in the 2-3 SS valve circuit, then DTC P0758 sets. DTC P0758 is a type A DTC.

CONDITIONS FOR RUNNING THE DTC
^ The ignition switch is in the ON position.
^ The system voltage is 8-18 volts.

CONDITIONS FOR SETTING THE DTC
One of the following conditions occurs for 4.3 seconds:
^ The PCM commands the solenoid ON, and the voltage feedback remains high (B+).
^ 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).
^ The PCM commands an immediate landing to 2nd gear.
^ The PCM commands maximum line pressure.
^ The PCM inhibits TCC engagement.
^ The PCM freezes shift adapts from being updated.
^ 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 P0758 in PCM history.

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
^ An open in the power feed circuit may cause multiple DTCs to set.
^ Inspect the connectors at the PCM, the 2-3 SS valve and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent and Poor Connections in Diagrams.
^ inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Diagrams.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
8. This step tests the electrical operation of the solenoid.
9. This step verities the PCMs ability to command the solenoid.
17. This step verities that the circuit has the correct resistance.