Test Point 26

Fault, DTC 70 Test Point 26

Torque converter clutch fault Open circuit/short to ground

Possible causes, elimination, notes

Fault effect:
Torque converter clutch always open.
1. Check ATF level and erase fault memory.
2. Perform a test drive and read out the fault memory.

NOTE: Diagnosis conditions for fault detection are.
- Torque converter clutch activated.
- No engine speed fault, spider shaft speed fault, transmission ratio fault or pressure regulator 4 fault entered as present.
- Gear 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 possible faults may be present.
- Electrical activation of pressure regulator 4 not OK (diagnostic trouble codes 83 and 11 present?).
- Mechanical defect in pressure regulator 4.
- ATF supply to the torque converter clutch not OK.
- Converter defective.