BE–173 BODY ELECTRICAL SYSTEM – CRUISE CONTROL SYSTEM DTC 12 Actuator Magnet Clutch Circuit CIRCUIT DESCRIPTION This circuit turns on the magnet clutch inside the actuator during cruise control operation according to the signal from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control, the rotor shaft between the motor and control plate is released. When the brake pedal is depressed, the stoplight switch turns on, supplying electrical power to the stoplight. Power supply to the magnet clutch is mechanically cut and the magnet clutch is turned OFF. When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h (9 mph), the ECU turns the magnet clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph) above the set speed, then cruise control at the set speed is resumed. Code No. | Diagnosis | Trouble area 12 | • Overcurrent (short) in magnet clutch circuit. • Open (0.8 sec) in magnet clutch circuit. | • Cruise control magnet clutch. • Harness or connector between ECU and magnet clutch, magnet clutch and body ground. • ECU WIRING DIAGRAM Cruise Control ECU 12 V STP* 1 12 V STP* 16 L 10 Stop Fuse W W 2 1 G-W R-L 8 IB6 R-L B-W 4 3 Stop Light Switch 5 Magnet Clutch 4 BR-B 17 IB6 BR-B L- 26 N08430