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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (Except For STI) (4 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P2119: Throttle Actuator "A" Control Throttle Body Range/Performance >> Diagnostic Method

Diagnostic Method

Judge as NG if the criteria below are met.

Diagnosis 1: Throttle position is out of range 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Throttle position ≥ 17.3%

Diagnosis 2: Intake air amount is out of range 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Amount of intake air > 19.16 g/s (0.68 oz/s)

Diagnosis 3: All time monitoring 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Difference between actual throttle opening angle and estimated opening angle ≥ 4.2%

Diagnosis 4: Actual opening angle change amount small 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Difference between actual throttle opening angle and estimated opening angle ≥ 2.1%

Diagnosis 5: Actual opening angle change amount large 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Difference between actual throttle opening angle and estimated opening angle ≥ 4.2%

Diagnosis 6: Actual opening angle not change 

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Difference between actual throttle opening angle and target throttle opening angle ≥ 1.68%

Time needed for diagnosis: 

Diagnosis 1: Throttle position is out of range 

200 ms

Diagnosis 2: Intake air amount is out of range 

200 ms

Diagnosis 3: All time monitoring 

2000 ms

Diagnosis 4: Actual opening angle change amount small 

1000 ms

Diagnosis 5: Actual opening angle change amount large 

500 ms

Diagnosis 6: Actual opening angle not change 

1000 ms

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.