Workshop Repair Manuals

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yugo Workshop Repair Guides


Yugo L4-1300cc 1.3L (1991)

Powertrain Management > Computers and Control Systems > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Testing and Inspection > Control Unit Voltage Supply Inspection > Page 567

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c. With ignition switch in Run position, check for battery voltage at main relay terminals 85 and 86. If battery voltage is not present, check for

continuity between main relay terminal 85 and ground, and between terminal 85 and ignition switch terminal 15.

d. Check for battery voltage on main relay connector terminals 30 and 85. If readings are identical, check for damage to wires between main

relay connector terminal 85 and ground, and between main relay connector terminal 30 and the battery.

e. If all wires and connections test good, and no voltage is present at ECU, replace main relay. 

Powertrain Management > Computers and Control Systems > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Testing and Inspection > Control Unit Voltage Supply Inspection > Page 567

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