Test point

Injection circuit The ignition circuit monitoring relay is mounted on the retaining plate shut down for the LH and EZK control units.

Fault code 1 31

If an ignition circuit fails, the power supply to the injector valves is interrupted.

At the same time one of the two colored LEDs integrated into the relay lights up.

Injection circuit I shut down - red LED lights up.

Injection circuit I shut down - green LED lights up.

Fo troubleshooting, see 928 Repair Manual volume l-A, pages 28-77

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