Circuit Description
The engine control module (ECM) uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear).
The ECM then compares the actual gear with the shift schedule in the ECM memory to detect mechanical troubles of the shift solenoid valves and valve body.
The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0796 Pressure Control Solenoid "C" Performance (Shift Solenoid Valve SL3)
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
The gear commanded by the ECM does not match with the actual gear when driving.
Action Taken When the DTC Sets
| • | DTC P0796 is a type C DTC. |
| • | The malfunction indicator lamp (MIL) illuminates the first time the diagnostic runs with the fault active. |
Conditions for Clearing the MIL/DTC
The DTC will clear when conditions for setting the DTC have been repaired.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Automatic Transmission Controls Schematics Connector End View Reference: Component Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Is the resistance measured within specified value and does the solenoid make an operating sound? | 5 to 5.6 Ohms | Go to Step 3 | Go to Step 5 |
3 | Inspect transmission valve body assembly for foreign objects and each valve operates smoothly. Is transmission valve body operation OK? | -- | Go to Step 4 | Go to Step 6 |
4 | Inspect torque converter clutch assembly for normal operation. Is torque converter clutch operation OK? | -- | Go to Step 8 | Go to Step 7 |
5 | Replace the shift solenoid valve SL3. Did you complete the replacement? | -- | Go to Step 8 | -- |
6 | Replace the transmission valve body assembly. Did you complete the replacement? | -- | Go to Step 8 | -- |
7 | Replace the torque converter clutch assembly. Did you complete the replacement? | -- | Go to Step 8 | -- |
8 |
Does the DTC reset? | -- | Go to Step 2 | System OK -- |
