Test Point 1 - Checking Ground and Plug Connections

TEST POINT 1

Checking Ground and Plug Connections




1. Check both ground connections next to pulse transmitters for cleanliness and firm contact.




2. Check ground connection between engine and body.

3. Check plug connections listed below carefully for tight fit, bent plug sleeves and corrosion.




3.1 Plug connection for DME control unit. To remove, push catch toward right side and at same time take off plug forward.




3.2 Plug connection for speed and reference mark transmitters (check codes).




3.3 Plug connection for air flow sensor.




3.4 Plug connection for throttle switch.




3.5 Plug connection for temperature sensor II (engine temperature).




3.6 Plug connection for fuel injectors.




3.7 Plug connection above brake booster.

3.8 Relay socket of fuel pump relay.

Note: Frequent removal and installation of the relay could loosen and push back the catch for flat female plugs.