Main Relay (Computer/Fuel System): Service and Repair

Replacing main relay (M54)

Switch off ignition.
Connect DIS Tester.







Release screw connection of electronics box (1).

Installation:
Tightening torque, refer to Technical Data
Remove electronics box (1).







Arrangement:
1. Main relay of Digital Motor Electronics
2. Engine fuses of Digital Motor Electronics







Notes on troubleshooting:
If the starter motor cranks the engine during the starting sequence but the engine fails to fire, then:
1. Check engine fuses
2. If fuses are blown, replace them completely with fuse holder
3. Find out why fuses have blown
Continue troubleshooting as per DIS instructions.