DTC 36
CIRCUIT OPERATION
- A/T relay supplies the battery positive voltage to the torque converter clutch solenoid valve (terminal 10).
- The torque converter clutch solenoid valve closes when energized (on), and opens when deenergized (off). The PCM energizes or deenergizes the valve, based on input from the A/T fluid temperature sensor, Vehicle speed sensor, Throttle position sensor, Input shaft speed sensor, Output shaft speed sensor, and Park/Neutral position sensor.
DTC SET CONDITIONS
- If the resistance value for the torque converter clutch solenoid valve is greater than 3.5 ohms at 100°C for more than four seconds or less than 2.6 ohms at 100°C (212°F) for more than four seconds, it is judged that there is a short circuit or an open circuit in the torque converter clutch solenoid valve and diagnostic trouble code number "36" is output. If drive duty rate for the torque converter clutch solenoid valve is 100 percent for continuous period of four seconds or more, it is judged that there is an abnormality in the torque converter clutch system and diagnostic trouble code number "52" is output. When diagnostic trouble code number "36" is output, the transaxle is locked into 3rd gear as a fail-safe measure. For vehicles with sport mode, the "N" range light flashes once per second.
If the torque converter clutch remains engaged for a continuous period of ten seconds when the PCM is attempting to disengage the torque converter clutch, it is judged that the torque converter clutch is stuck on and diagnostic trouble code number "53" is output.
TROUBLESHOOTING HINTS
The most likely causes for this code to be set:
- Malfunction of the torque converter clutch solenoid valve
- Damaged harness, connector
- Malfunction of the PCM
DIAGNOSIS
Required Special Tool: MB991502: Scan Tool (MUT-II)
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
STEP 1. Using Scan Tool MB991502, Check Actuator Test Item 6: Torque Converter Clutch Solenoid Valve.
1. Connect scan tool MB991502 to the data link connector.
2. Check the following item in the actuator test. Refer to Actuator Test Reference Table.
a. Item 6: Torque converter clutch solenoid valve
3. Check that the solenoid valve clicks.
NOTE: The engine must not be running for this test.
If operating sound can be heard, this malfunction can be intermittent. Refer to How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction.
If no operating sound can be heard, go to Step 2.
STEP 2. Check The Power Supply Circuit At The Solenoid Valve.
1. Disconnect harness connector B-40 and measure at the harness side.
2. Turn the ignition switch to "ON" position.
3. Measure the voltage between terminal 10 and ground.
- Voltage should be battery positive voltage.
If battery positive voltage, go to Step 3.
If not battery positive voltage, repair the connectors or the harness wires between the solenoid valve and the ignition switch.
STEP 3. Check The Torque Converter Clutch Solenoid Valve.
1. Disconnect harness connector B-40 and measure at the valve side.
2. Measure resistance of torque converter clutch solenoid valve.
Standard value:
If at the standard value, go to Step 4.
If outside the standard value, replace the torque converter clutch solenoid valve and solenoid valve harness. Refer to Valve Body. Recheck for DTCs.
STEP 4. Check Harness Connector B-40 At The Torque Converter Clutch Solenoid Valve For Damage.
If harness connector B-40 is damaged, repair or replace it. Refer to Harness Connector Inspection. Recheck for DTCs.
If harness connector B-40 is in good condition, go to Step 5.
STEP 5. Measure The PCM Terminal Voltage.
Measure the voltage, which is applied to terminal numbers 107 of PCM connector C-61 <2.4L Engine> or C-63 <3.0L Engine>. Refer to PCM Terminal Voltage Reference Chart for Transaxle Operation.
If the voltage meets the specification, go to Step 6.
If the voltage does not meet the specification, repair the connectors or the harness wires between the solenoid valve and the PCM.
STEP 6. Check Harness Connector C-61 <2.4L Engine> Or C-63 <3.0L Engine> At The PCM For Damage
If harness connector C-61 <2.4L Engine> or C-63 <3.0L Engine> is damaged, repair or replace it. Refer to Harness Connector Inspection. Recheck for DTCs.
If harness connector C-61 <2.4L Engine> or C-63 <3.0L Engine> is in good condition, replace the PCM
Required Special Tool: MB991502: Scan Tool (MUT-II)
To prevent damage to scan tool MB991502, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
STEP 7. Using Scan Tool MB991502, Check Data List.
1. Connect scan tool MB991502 to the data link connector.
2. Road test according to the drive conditions specified.
3. Check the following item in the data list.
a. Item 36: Torque converter clutch solenoid valve duty percent.
b. Item 52: Amount of torque converter clutch slippage
4. Check that the values shown are displayed when each data list item is entered.
If the values shown above are displayed, replace the torque converter clutch solenoid valve. Refer to Valve Body.
If the values shown above are not displayed, replace the PCM. The immobilizer-ECU and the ignition key should be replaced together with it. Refer to Ignition Switch and Immobilizer System - Ignition Switch and Immobilizer System.