Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 362
GD(H4DOTC)-200
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DO:DTC P0617 STARTER RELAY CIRCUIT HIGH
1. OUTLINE OF DIAGNOSIS
Detect abnormal continuity in the starter SW.
Judge as ON NG when the starter SW signal remains ON.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
• Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 30000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.
Time Needed for Diagnosis: Less than 1 second
Secondary Parameters
Enable Conditions
None
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 8 V
Engine condition
After engine starting
Starter SW signal
ON
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 8 V
Starter SW signal
OFF
GD(H4DOTC)-201
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DP:DTC P062F INTERNAL CONTROL MODULE EEPROM ERROR
1. OUTLINE OF DIAGNOSIS
Judge as NG when the EEPROM operation is abnormal. (EEPROM malfunction)
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
Throttle position sensor
(6)
Accelerator pedal position sensor
2
(10) CPU
(2)
Throttle position sensor 1
(7)
I/F circuit
(11) Monitoring IC
(3)
Throttle position sensor 2
(8)
Amplifier circuit
(12) EEPROM
(4)
Accelerator pedal position sensor
(9)
Engine control module (ECM)
(13) Output IC
(5)
Accelerator pedal position sensor
1
Secondary Parameters
Enable Conditions
Starter switch
OFF
Battery voltage
> 6 V
EN-08016
(1)
(4)
(2)
(3)
(5)
(6)
(9)
(7)
(10)
(11)
(7)
(7)
(7)
(8)
(12)
(13)
GD(H4DOTC)-202
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Judge as OK and clear the NG when the malfunction criteria below are met.
Time Needed for Diagnosis: 48 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Judgment Value
Malfunction Criteria
Threshold Value
EEPROM writing
Writing completed
GD(H4DOTC)-203
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DQ:DTC P0851 NEUTRAL SWITCH INPUT CIRCUIT LOW (MT MODEL)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of neutral SW.
Judge as NG when there is no change in the neutral SW even if the driving shift was applied. (There is neutral
SW ON/OFF inversion from the vehicle speed and engine speed.)
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously in 2 seconds after starting the engine.
4. DIAGNOSTIC METHOD
• Abnormality Judgment
Judge NG when the malfunction criteria below are completed determined times or more after the neutral SW
change.
Time Needed for Diagnosis: 3 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgment
Judge as OK and clear NG when there is change in the neutral SW.
Time Needed for Diagnosis: Less than 1 second
Secondary Parameters
Enable Conditions
Battery voltage
≥ 10.9 V
Starter relay
OFF
Judgment Value
Malfunction Criteria
Threshold Value
Neutral switch signal (while changing from a to b below)
LOW (ON) continues.
Driving condition change
From a) to b)
a) Engine speed 600 rpm — 900 rpm & Vehicle speed = 0 km/h (0 MPH)
b) Engine speed 1600 rpm — 2550 rpm & Vehicle speed ≥ 64 km/h (39.8 MPH)
Judgment Value
Malfunction Criteria
Threshold Value
Neutral switch signal (while changing from a to b below)
Changes to HIGH (OFF).
Driving condition change
From a) to b)
a) Engine speed 600 rpm — 900 rpm & Vehicle speed = 0 km/h (0 MPH)
b) Engine speed 1600 rpm — 2550 rpm & Vehicle speed ≥ 64 km/h (39.8 MPH)
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