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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 42 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DO)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0068 Map/MAF - Throttle Position Correlation >> Diagnostic Method

Diagnostic Method

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Judge as NG when Low side or High side becomes NG.

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Low   
Engine speed < 2800 rpm
Throttle position ≤ 12 °
Output voltage < 1.44 V
Engine load > 0.39 g/rev (0.01 oz/rev)
High   
Engine speed 500 rpm - 900 rpm (AT model)
  550 rpm - 900 rpm (MT model)
Throttle position < 3.51 °
Output voltage ≤ 2.4 V
Engine load < 0.32 g/rev (0.01 oz/rev)

Time Needed for Diagnosis  :

Low side: 5000 ms

High side: 5000 ms

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

Judge as OK and clear the NG when both Low side and High side become OK.

If the duration of time while the following conditions are met is longer than the time indicated, judge as OK.

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Low   
Engine speed < 2800 rpm
Throttle position ≤ 12 °
Output voltage ≤ 1.44 V
Engine load > 0.39 g/rev (0.01 oz/rev)
High   
Engine speed 500 rpm - 900 rpm (AT model)
  550 rpm - 900 rpm (MT model)
Throttle position < 3.51 °
Output voltage < 2.4 V
Engine load < 0.32 g/rev (0.01 oz/rev)

Time Needed for Diagnosis  :

Low side: Less than 1 second

High side: Less than 1 second