DTC 33

CIRCUIT OPERATION
- A/T control relay supplies the system voltage to each solenoid valve (terminal 9 and terminal 10).
- Each solenoid valve closes when energized (on), and opens when deenergized (off). The PCM energizes or deenergizes each solenoid valve, based on inputs data from sensors such as throttle position sensor, PNP, stoplight VSS, PG-A, PG-13, ATF temperature sensor etc.
- The PCM provides the ground to energize each solenoid. The ground time is displayed in percent.
- As each solenoid is energized or deenergized, it influences hydraulic pressure in the transmission applying and releasing elements.

DTC SET CONDITIONS
- If the resistance value for a solenoid valve circuit is greater than 3.5 Ohms for 4 seconds at 100°C (212°F) or less than 2.692 for 4 seconds at 100°C (212°F), it is judged that there is a short circuit or an open circuit in the solenoid valve and the associated diagnostic trouble code is displayed. The transmission is locked into 3rd gear as a fail-safe measure, and the "N" range light flashes at a frequency of 1 Hz.

TROUBLESHOOTING HINTS
The most likely causes for these codes to be set:
- Malfunction of each solenoid valve
- Damaged connector
- Malfunction of the PCM

DIAGNOSIS





Required Special Tool: MB991502: Scan Tool (MUT-II)

CAUTION: To prevent damage to scan tool MB991502, make sure the ignition switch is "OFF" before connecting or disconnecting scan tool MB991502.

STEP 1. Using scan tool MB991502, check data list.
1. Check the following items in the data list.
a. Item 31: Low-reverse solenoid valve duty percent
b. Item 32: Underdrive solenoid valve duty percent
c. Item 33: Second solenoid valve duty percent
d. Item 34: Overdrive solenoid valve duty percent





2. Duty percent should be displayed as follows.
If the value above is displayed on each data list item, the malfunction can be intermittent. Refer to How to Use Troubleshooting/inspection Service Points.
If the value above is not displayed, go to Step 2.

STEP 2. Check each solenoid valve.





1. Disconnect harness connector B-02 and measure at the valve side.
2. Measure the resistance of each solenoid valve.





Standard value:

If at the standard value, check for system voltage at harness side terminals 9, 10. If not at system voltage, inspect A/T control relay, connector and wires. If OK, go to Step 3.
If outside the standard value, replace the solenoid valve. Refer to Valve Body. Recheck for DTCs.

STEP 3. Check the harness connector B-02 at the solenoid valve for damage.





If harness connector B-02 is damaged, repair or replace it. Refer to Harness Connector Inspection. Recheck for DTCs.
If harness connector B-02 is in good condition, go to Step 4.

STEP 4. Check the harness connector C-92 at the PCM for damage.





If harness connector C-92 is damaged, repair or replace it. Refer to Harness Connector Inspection. Recheck for DTCs.
If harness connector C-92 is in good condition, go to Step 5.

STEP 5. Check the harness wires between PCM connector C-92 and solenoid valve connector B-02.





NOTE: After inspecting intermediate connector C-96, inspect the wire. If intermediate connector C-96 is damaged, repair or replace it. Refer to Harness Connector Inspection.

It any harness wire between PCM connector C-92 and solenoid valve connector B-02 is damaged, repair them. Refer to Harness Connector Inspection. Recheck for DTCs.
If the harness wires are in good condition, recheck for DTCs.
If the malfunction is not eliminated, replace the PCM.