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Table 2 - Trouble Code Table: Trouble Code 74 MASS AIR FLOW SENSOR VOLTAGE HIGH > < Table 2 - Trouble Code Table: Trouble Code 71 INTAKE AIR TEMP. VOLTAGE HIGH

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Table 2 - Trouble Code Table

 

Trouble Code

Information Sensor Cause of Fault

Remedy in F0:DATA LIST No.

Trouble Code Storage when ....

Remarks

73

MASS AIR FLOW SENSOR VOLTAGE LOW

12

·   Engine speed > 520 rpm

·   The control unit receives a signal < 3.0 kg/h from the mass air flow sensor

     (short circuit to ground)

 

If trouble code 73 was recognized, the control unit calculates for the load signal with a replacement characteristic curve dependent on the engine speed and throttle valve position.

If the throttle valve potentiometer is also defective, the following replacement values are used for calculation:

For engine speed < 1520 rpm with load signal = 2.5 ms

For engine speed > 1520 rpm with load signal = 4.8 ms

 

 

 

 
Related Literature Units
-F0: Data List - Test Step 12 MASS AIR FLOW S.

Table 2 - Trouble Code Table: Trouble Code 74 MASS AIR FLOW SENSOR VOLTAGE HIGH > < Table 2 - Trouble Code Table: Trouble Code 71 INTAKE AIR TEMP. VOLTAGE HIGH