Subaru Legacy IV (2008 year). Service manual — part 634
GD(H6DO)-156
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CZ:DTC P0607 THROTTLE CONTROL SYSTEM CIRCUIT RANGE/PERFORMANCE
1. OUTLINE OF DIAGNOSIS
Judge as NG when any one of the followings is established.
(1) When the read value of throttle position sensor 1 signal is mismatched between main CPU and sub CPU.
(2) When the read value of accelerator pedal position sensor 1 signal is mismatched between main CPU and
sub CPU.
(3) When the sub CPU operates abnormally.
(4) When the communication between main CPU
m o sub CPU is abnormal.
(5) When the input amplifier circuit of throttle position sensor 1 is abnormal.
(6) When the cruise control cannot be canceled correctly.
(7) When the signal of brake SW1 and 2 is mismatched.
2. COMPONENT DESCRIPTION
(1)
Throttle position sensor
(6)
Accelerator pedal position sensor 2
(11)
Amplifier circuit
(2)
Throttle position sensor 1
(7)
Battery
(12)
Engine control module (ECM)
(3)
Throttle position sensor 2
(8)
Stop light
(13)
Sub CPU
(4)
Accelerator pedal position sensor
(9)
Brake switch
(14)
Main CPU
(5)
Accelerator pedal position sensor 1
(10)
I/F circuit
EN-01862
(1)
(4)
(2)
(3)
(5)
(6)
(7)
(8)
(9)
(12)
(11)
(10)
(10)
(10)
(10)
(13)
(14)
GD(H6DO)-157
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
(1) — (4): Always perform the diagnosis continuously.
(5): Always perform the diagnosis continuously when idling.
(6): Perform the diagnosis when the brake pedal is depressed.
(7): Always perform the diagnosis continuously.
Secondary Parameters
Enable Conditions
(1) Ignition switch
ON
(1) Battery voltage
t 6 V
(2) Ignition switch
ON
(2) Battery voltage
t 6 V
(3) Ignition switch
ON
(3) Battery voltage
t 6 V
(4) Ignition switch
ON
(4) Battery voltage
t 6 V
(5) Throttle opening angle
(5) Ignition switch
ON
(5) Battery voltage
t 6 V
(6) Brake switch (only with cruise control) ON
(6) Ignition switch
ON
(6) Battery voltage
t 6 V
(7) Ignition switch
ON
(7) Battery voltage
t 6 V
GD(H6DO)-158
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
• Abnormality Judgement
Judge as NG when the following conditions are established.
Time Needed for Diagnosis:
(1): 600 ms
(2): 830 ms
(3): 200 ms
(4): 200 ms
(5): 24 ms
(6): 250 ms
(7): 200 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgement
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis:
(1): 2000 ms
(2): 2000 ms
(3): 2000 ms
(4): 2000 ms
(5): 24 ms
(6): 2000 ms
(7): 2000 ms
Judgement Value
Malfunction Criteria
Threshold Value
(1) Difference of CPU reading value of
the throttle position sensor signal
t 0.4058 V
(2) Difference of CPU read value of the
accelerator pedal position sensor signal
t 0.127542424 V
(3) WD pulse from sub CPU
No WD pulse occur
(4) Communication between CPU
Not possible to communicate
(5) |Throttle position sensor 1 opening
angle — (Throttle position sensor 1
opening angle after passing amplifier) 1/4|
t 3 °
(6) Cruise control cancel signal at brake
ON
Cruise control cancel signal
OFF
(7) Brake switch 1, 2 signal
SW 1 and 2 are not matched
Judgement Value
Malfunction Criteria
Threshold Value
(1) Difference of CPU reading value of
the throttle position sensor signal
< 0.4058 V
(2) Difference of CPU read value of the
accelerator pedal position sensor signal
< 0.127542424 V
(3) WD pulse from sub CPU
WD pulse occur
(4) Communication between CPU
Possible to communicate
(5) |Throttle position sensor 1 opening
angle — (Throttle position sensor 1
opening angle after passing amplifier) 1/4|
< 3 °
(6) Cruise control cancel signal at brake
ON
Cruise control cancel signal
ON
(7) Brake switch 1, 2 signal
SW 1 and 2 are matched
GD(H6DO)-159
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DA:DTC P0638 THROTTLE ACTUATOR CONTROL RANGE/PERFORMANCE
(BANK 1)
1. OUTLINE OF DIAGNOSIS
Judge as NG when the target opening angle and actual opening angle is mismatched or the current to motor
is the specified duty or more for specified time continuously.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously when the electronic throttle control is operating.
(1)
Motor
(3)
Engine control module (ECM)
(4)
Drive circuit
(2)
Throttle position sensor
Secondary Parameters
Enable Conditions
Normal operation of electronic throttle
control
ON
EN-01863
(3)
(4)
(1)
(2)
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