P1780
TORQUE REDUCTION SIGNAL MALFUNCTION - P1780Function:
ECM signal monitor.
Possible Causes:
Faulty harness wiring/connection.
Faulty ECM signal.
Effects:
Transmission warning lamp illuminated.
Harsh gearshifts.
Remedy:
Repair or renew harness/connector.
Examine ECM fault diagnosis.
Connections
Troubleshooting Schematic
NOTE: * Torque reduction request, ** Engine torque signal.
Key to Schematic Diagram
1. Transmission Control Module
2. Transmission Unit
3. Brake Switch
4. Pressure Switch - Manifold
5. Transmission Fluid Temperature Sensor
6. Input Speed Sensor
7. Output Speed Sensor
8. Engine Control Module
9. Left-hand Heelboard Fuse-box
10. Torque Control Clutch Solenoid
11. Force Motor
12. Shift Solenoid A
13. Shift Solenoid B
14. ABS/Traction Control Control Module
15. Right-hand Heelboard Fuse-box
16. Kickdown Switch
ENGINE TORQUE SIGNAL MALFUNCTION - P1781
Function:
ECM signal monitor.
Possible Causes:
Faulty harness wiring/connection.
Faulty ECM signal.
Effects:
Transmission warning lamp illuminated.
Harsh gearshifts.
Remedy:
Repair or renew harness/connector.
Examine ECM fault diagnosis.
Connections
Troubleshooting Schematic
NOTE: * Torque reduction request, ** Engine torque signal.
Key to Schematic Diagram
1. Transmission Control Module
2. Transmission Unit
3. Brake Switch
4. Pressure Switch - Manifold
5. Transmission Fluid Temperature Sensor
6. Input Speed Sensor
7. Output Speed Sensor
8. Engine Control Module
9. Left-hand Heelboard Fuse-box
10. Torque Control Clutch Solenoid
11. Force Motor
12. Shift Solenoid A
13. Shift Solenoid B
14. ABS/Traction Control Control Module
15. Right-hand Heelboard Fuse-box
16. Kickdown Switch