Test Point 26

TEST POINT 26
Solenoid Valve, Torque Converter Clutch Open Circuit/Short To Ground

DTC 70

Fault Effect: Torque converter clutch always open.

1. Check ATF level (refer to Page 37 - A 12) and erase the fault memory.

2. Perform a test drive and read out the fault memory.

Note: Diagnosis conditions for fault detection:
- Torque converter clutch activated.
- No engine speed fault, spider shaft speed fault, transmission ratio fault or pressure regulator 4 fault entered as present.
- Gear or 4 or 5.
- No shifting operation taking place.

3. If the fault recurs after the test drive and no other faults are stored, the following fault possibilities can be present:
- Electrical activation of pressure regulator 4 not OK (diagnostic trouble codes 83 and 55 present?).
- mechanical defect in pressure regulator 4.
- ATF supply to the torque converter clutch not OK.
- Converter defective.