Diagnostic Trouble Codes
Group 30: Electrical system
106
Circuit description
The camshaft sensor is an inductive sensor. When
the camshaft rotates impulses are created in the sen-
sor via a tooth wheel installed on the camshaft. The
tooth wheel has 7 teeth, one for each cy one
to determine when cylinder one is to be injected. The
impulses create a pulse signal in the sensor that the
engine control unit (EMS 2) uses to calculate when a
cylinder is in turn for injection.
Fault tracing
FMI 2 Checking sensor circuit
Conditions for fault code:
Incorrect timing.
Possible reason:
•
Polarity fault. The cables to the cam sensor is
shifted.
•
Intermittent fault.
•
Incorrectly mounted cam sensor.
Suitable action:
1.
Check cable harness and connectors between
cam sensor and EMS 2.
2.
Check that the cam sensor is connected as in the
circuit description.
3.
Check contact pressure in socket 45 and 46 in
engine connector A.
4.
Check function of cam sensor.
speed sensor,
camshaft
Note! Only TAD 650, 660, 750, 760 has an engine interface. On
TAD 734 the wiring to the EMS 2 is the same but without any en-
gine interface.
engine
interface
