Activation, Checking
- Connect voltage test lamp VAG1527 between terminal 6 (B+, terminal 15) and 4 (Ground (GND) activation of Engine Control Module (ECM)).
- When switching on ignition, voltage test lamp must light up for approx. 1 second and then go out. When operating starter, voltage test lamp must light up constantly.
NOTE:
- Voltage test lamps with low current draw do not go out completely after 1 second, but rather light up weakly until starter is operated.
If voltage test lamp lights up, replace Secondary Air Injection (AIR) pump relay.
If voltage test lamp does not light up, check wire connection as follows:
- Connect test box VAG1598/31 to wiring harness of Engine Control Module (ECM) → Wire and Component Test at Engine Control Module using VAG 1598/31 .
- Connect portable multimeter VAG1526 between terminal 4 of relay socket and socket 46 of test box and check wire connection for continuity.
- If specified value is not obtained, check wire connection for open circuit or short circuit. → Electrical Wiring Diagrams, Troubleshooting and Component Locations
- If there is no open circuit and voltage test lamp does not light up, replace Engine Control Module (ECM) → Engine Control Module, Replacing and generate readiness code again → Readiness Code, Generating .
- Read readiness code → Readiness Code, Reading . If DTC memory was erased, readiness code must be generated again → Readiness Code, Generating