Motronic Engine Control Module (ECM) power supply relay -J271-, testing: Notes

Fig 1: Identifying Special Tools - Motronic Engine Control Module (ECM) Power Supply Relay -J271-, Testing

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Special tools and equipment 

• VAG 1526 A
• VAG 1594 A
• VAG 1598/31

NOTE: The motronic engine control module (ECM) power supply relay -J271-supplies voltage to the ignition coils with power output stages and to the engine control module (pin 121).