Vauxhall Workshop Service and Repair Manuals

Crankshaft/Camshaft Inductive Pick-up (Only Simtec)  

Inductive pick-ups are used on the crankshaft and the camshaft for vehicles fitted with Simtec 56.0 and 56.1. These pick-ups operate using the phase shift for two sinusoidal oscillations. Because the adaptation and reference signals for both of the inductive pick-ups are identical, the testing for these two sensors has been combined into one test.  

Measurement:	Plot of voltage at the signal output of the inductive pick-up in comparison to the voltage plot in the oscillator circuit.
Check Objective:	Operational check

Preparation  

Switch off the engine and ignition.  

Connections  

INPUT A	INPUT B
Connect the red measurement lead to pin 1 of the plug connector for the inductive pick-up. Connect the ground lead to pin 3 or ground.	Connect the grey measurement lead to pin 2 of the plug connector for the inductive pick-up. Connect the ground lead to pin 3.

Procedure  

Switch on ignition.  

Reference Curve

If the measurement only shows one signal plot (sinusoidal curve), the excited oscillation of the oscillator circuit is missing. This can be traced to a fault on the inductive pick-up.