Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 331
GD(H4DOTC)-76
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AQ:DTC P013A O2 SENSOR SLOW RESPONSE - RICH TO LEAN (BANK 1 SEN-
SOR 2)
1. OUTLINE OF DIAGNOSIS
Detect the slow response of rich → lean for rear oxygen sensor output.
When the deceleration fuel cut has occurred, detect the trouble by calculating the time when the rear oxygen
sensor output passes through the predetermined range of voltages.
Judge as NG when the response time is larger than the threshold value.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform diagnosis once during deceleration fuel cut from a constant and high speed driving, when rear oxy-
gen sensor is warmed up sufficiently.
(A)
Electromotive force
(B)
Air fuel ratio
(C)
Lean
(D)
Rich
(E)
Theoretical air fuel ratio
(F)
Comparative voltage
(1)
Atmosphere
(2)
Exhaust gas
(3)
Electromotive force
Secondary Parameters
Enable Conditions
Battery voltage
> 10.9 V
Rear oxygen sensor closed loop control
Operation
Current calculation time of the rear oxygen sensor heater after starting
≥ 180000 ms
Engine speed when fuel cut starts
≥ 1000 rpm
Rear oxygen sensor voltage when fuel cut starts
≥ 0.55 V
Fuel cut time
≥ 5000 ms
Engine coolant temperature when fuel cut starts
≥ –40 °C (–40 °F)
Estimated temperature of rear oxygen sensor element when fuel cut starts
≥ 450 °C (842 °F)
EN-01696
(3)
V
(1)
(2)
(2)
(E)
(F)
(C)
(B)
(D)
(A)
GD(H4DOTC)-77
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Detect the trouble by calculating the response time of the rear oxygen sensor during fuel cut.
• Abnormality Judgment
Judge as NG when the following conditions are established.
Time Needed for Diagnosis: 10 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis: 10 seconds
(A)
0.55 V
(B)
0.50 V
(C)
0.20 V
(D)
0.15 V
(E)
0 V
(F)
Diagnostic parameter
(G)
Normal
(H)
Malfunction
Judgment Value
Malfunction Criteria
Threshold Value
Time when rear oxygen sensor voltage changed from 0.5 V to 0.2 V.
> 837 ms
Judgment Value
Malfunction Criteria
Threshold Value
Time when rear oxygen sensor voltage changed from 0.5 V to 0.2 V.
≤ 837 ms
EN-09344
(H)
(E)
(D)
(C)
(B)
(A)
Rear oxygen sensor (V)
Fuel cut on deceleration
(F)
(G)
GD(H4DOTC)-78
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AR:DTC P013B O2 SENSOR SLOW RESPONSE - LEAN TO RICH (BANK 1 SEN-
SOR 2)
1. OUTLINE OF DIAGNOSIS
Detect the slow response of lean → rich for rear oxygen sensor output.
After the deceleration fuel cut has occurred, detect the trouble by calculating the time when the rear oxygen
sensor output passes through the predetermined range of voltages.
Judge as NG when the response time is larger than the threshold value.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform diagnosis only once after recovering from a deceleration fuel cut continued for more than predeter-
mined time.
(A)
Electromotive force
(B)
Air fuel ratio
(C)
Lean
(D)
Rich
(E)
Theoretical air fuel ratio
(F)
Comparative voltage
(1)
Atmosphere
(2)
Exhaust gas
(3)
Electromotive force
Secondary Parameters
Enable Conditions
Battery voltage
> 10.9 V
Front oxygen (A/F) sensor closed loop control
Operation
Fuel cut time
≥ 5000 ms
EN-01696
(3)
V
(1)
(2)
(2)
(E)
(F)
(C)
(B)
(D)
(A)
GD(H4DOTC)-79
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Detect the trouble by calculating the response time of the rear oxygen sensor after fuel cut.
• Abnormality Judgment
Judge as NG when the following conditions are established.
Time Needed for Diagnosis: 10 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis: 10 seconds
(A)
0.55 V
(B)
0.50 V
(C)
0.30 V
(D)
0.25 V
(E)
0 V
(F)
Diagnostic parameter
(G)
Normal
(H)
Malfunction
Judgment Value
Malfunction Criteria
Threshold Value
Time when rear oxygen sensor voltage changed from 0.3 V to 0.5 V.
> 4000 ms
Judgment Value
Malfunction Criteria
Threshold Value
Time when rear oxygen sensor voltage changed from 0.3 V to 0.5 V.
≤ 4000 ms
(H)
(D)
(C)
EN-09345
(E)
(B)
(A)
Rear oxygen sensor (V)
Fuel cut on deceleration
(F)
(G)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст