DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P2758
Conditions for Running the DTC
| • | Engine torque is 44-240 N·m. |
| • | Input speed is 3,000 RPM or less. |
| • | 8.0 seconds pass after changing to the shift position (D, M, 2). |
| • | 3 minutes pass after ignition ON or reset of the TCM. |
| • | 0.5 second pass after shifting control. |
| • | Transmission fluid temperature is 20°C (68°F). |
| • | Shift position is D, M, 2 range. |
| • | Engine speed is 400 RPM or greater. |
| • | System voltage is 10.5 volts or greater. |
| • | No shifting. |
| • | Emergency mode is OFF. |
| • | No failure detection of output speed sensor, input speed sensor, selector position, shift solenoid, linear solenoid, CAN BUS OFF, engine RPM, engine torque, throttle, transmission fluid temperature sensor. |
| • | No failure detection of ABS and wheel speed. |
Conditions for Setting the DTC
Engine RPM - input speed RPM is between -50 and 50 RPM for 12 seconds.
Action Taken When the DTC Sets
| • | TCM will request the illumination of MIL. |
| • | TCM records the operating condition when the Conditions for Setting the DTC are met. TCM stores this information as Failure Record. |
| • | TCM stores DTC in TCM history. |
| • | TCM turns Emergency mode ON. |
| • | When the Emergency mode is ON, the following conditions occur : |
| - | The transmission will operate in 4th gear when the transmission is shifted into D or M+ range. |
| - | The transmission will operate in 2nd gear when the transmission is shifted into 2 or M- range. |
| - | Learn control is disabled. |
| - | Lock up control is disabled. |
| - | Adaptive control is disabled. |
| - | N-D shifting is disabled. |
| - | ABS function is disabled. |
Conditions for Clearing the MIL/DTC
| • | The MIL turns OFF when no failure is detected for three consecutive driving cycles. |
| • | The scan tool can clear the DTC from the TCM history. |
| • | TCM clears the DTC from the TCM history memory after forty consecutive warm-up cycles without fault. |
Cause of Failure
| • | Shift Solenoid (SS) 4 (Stuck ON) |
| • | TCC Lock Up Pressure Control (PC) Solenoid (Stuck ON) |
| • | Lock Up Clutch Failure |
| • | Inside Valve Body |
| • | TCM |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 |
Is the Malfunction Indicator Lamp (MIL) ON? | -- | Go to Step 2 | Repair the temporary connection failure of connector. Refer to Repairing Connector Terminals. |
2 |
Is DTC P2758 displayed? | -- | Go to Step 3 | Repair the temporary connection failure of connector. Refer to Repairing Connector Terminals. |
3 |
Is DTC P2758 reappeared? | -- | Go to Step 4 | Replace the TCM. |
4 |
Is the condition of the solenoid OK? | -- | Go to Step 5 | Replace SS4 |
5 | Estimate the failure of TCC lock up pressure control solenoid or internal valve body. Is problem found? | -- | Replace the valve body assembly. Refer to Control Valve Body Replacement | Repair or Replace the transaxle assembly. Refer to Transmission Replacement |
