Ground

Ground

Power ground

The following components are grounded to grounding point G37P:

•	Control module, EDC 15 (595)

•	Diesel pump (598)

•	Accelerator pedal position sensor (379)

•	Control module, glow plugs (596)

Sensor ground

The following components are grounded to control module pin 93:

•	Coolant temperature sensor, engine management system (202)

•	Engine oil temperature sensor (559)

•	Manifold absolute pressure sensor (431)

Other ground connections

The following components are grounded via their respective control module connections:

•	Mass air flow sensor (205)

•	Intake air temperature sensor (407)

•	Control valve, charge air (179a)

•	Control valve, exhaust gas recirculation (404)

•	Control valve, swirl throttle (403)

The crankshaft position sensor (345) is grounded to control module pin 98.

Diagnostics

If the power ground is not present, the engine will not start and the system cannot be contacted with the scan tool.