ZEST BOLT Service Manual

Automated Manual Transmission 28 solenoid valve and check its operation. Solenoid valve for 5th/reverse position se- lection: Carry out the solenoid valve active diagno- sis. If the result of the test is not positive, move on to the next step. Check the state of the connections and the continuity of the wiring. If a fault is found restore/replace the wiring. Carry out the solenoid valve active diagno- sis again. If the test fails, replace the solenoid valve and check its operation. Clutch solenoid valve current: Check the state of the connections and the continuity of the wiring. If a fault is found restore/replace the wiring. Replace the solenoid valve and check its operation by testing and performing a gear change. Clutch sensor: Check the state of the connections and the continuity of the wiring. If a fault is found restore/replace the wiring. Replace the CSC and check the correct reading of the position by performing a se- ries of gear changes. Odd or even gear engagement (engagement solenoid valves): Carry out the solenoid valve active diagno- sis. If the result of the test is not positive, move on to the next step. Check the state of the connections and the continuity of the wiring. If a fault is found restore/replace the wiring. Carry out the solenoid valve active diagno- sis again. If the test fails, replace the solenoid valve and check its operation. Control unit earth error: Check the tightening state of the earth’s to the body and the engine. Check the state of the connections and the continuity of the wiring. If a fault is found restore/replace the wiring. Load relay error*: Check the battery status. Check the state of the connections and the continuity of the wiring. In particular Check the chain of parts that provide pow- er to the control unit (wiring, fuses, relays, etc.) If a fault is found restore/replace the wiring. Engagement sensor: In the event of this error the gear change is slower than normal because the operation of the system is in recovery. Check the state of the connections and the continuity of the wiring. If a fault is found restore/replace the wiring. Replace the engagement** Sensor and check the correct reading of the position by performing a series of gear changes. Selection sensor: In the event of this error the gear change is slower than normal because the operation of the system is in recovery. Check the state of the connections and the continuity of the wiring. If a fault is found restore/replace the wiring. Replace the selection Sensor and check the correct reading of the position by perform- ing a series of gear changes.