ZEST BOLT Service Manual

SRS 15 Removal 1. Disconnect battery and wait for 2 minutes.. 2. Remove the driver air bag; disconnect the driver air bag connector. To disconnect first we should lift the yellow lock on connector and then pull the connector out. 3. Disconnect the connector of steering wheel switches and horn connections. Remove the steering wheel nacelle and disconnect the connector coming from vehicle level wiring harness to clock spring. 4. Unscrew the four mounting nuts of clock spring and take out the clock spring. Installation 1. Assemble new clock spring on the combi switch and break the red locking tab on the clock spring and then assemble the steering wheel. Please ensure that serial number of clock spring being fitted on the vehicle is recorded and information is sent back to the plant for updating the vehicle record. 2. Reconnect all the connections. Make sure that vehicle wiring harness connector in fully inserted in to clock spring connector and locked. Similarly insert the driver air bag connector fully and push the yellow locking tab. 3. Reconnect battery. 4. Check the working of horn, steering wheel switches also ensure that air bag warning lamp on instrument cluster goes off. 5. If air bag lamp is continuously on then connect a diagnostic tool and see the faults. For driver air bag we can have two faults: a) Driver air bag resistance too low b) Driver air bag resistance too high For fault a) we need to ensure that vehicle wiring harness connector is properly inserted into clock spring connector. Clock spring connector has internal shorting link which opens after vehicle wiring harness connector is fully inserted and locked. Other possibility for this fault is that cable coming from Air bag control unit is pinched in the vehicle. For fault b) Ensure that driver air bag connector is fully inserted and lock is pushed. This fault can also come if the clock spring flexible PCB is cut due to over strain. This can cause if the clock spring is not properly centered (turn wise) during fitment.