Vauxhall Workshop Service and Repair Manuals

Trouble

Information Sensor

Remedy in

Trouble Code Storage when ...

Code

Cause of Fault

F0:DATA LIST

Test Step

74

MAF SENSOR

05

· Engine speed n < 2520 RPM

VOLTAGE HIGH

· Engine does not start

· Signal lead (Ter. 3 on mass air flow sensor hot-wire plug,

to battery voltage)

Caution:

Simulation can lead to destruction of the mass

air flow sensor (breaking the measuring resistance)

If trouble code 74 is stored, the replacement values are different

for the following 2 operating conditions:

1)Throttle valve switch idle contact closed

·Calculation of the load signals according to the following formula:

2)Throttle valve switch idle contact open:

·Load signal is constantly 4.8 ms

·Firing angle is constantly 20 °CA BTDC