ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P1531 BATTERY CURRENT SENSOR CIRCUIT HIGH
DTC detecting condition:
Immediately at fault recognition
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode > PROCEDURE">
.
Wiring diagram:
Engine electrical system Engine Electrical System">
STEP | CHECK | YES | NO |
1.CHECK CURRENT DATA.
1) Start the engine.
2) Read the value of «Battery current value» using the Subaru Select Monitor.
NOTE:
For detailed operation procedures, refer to “Current Data Display For Engine”. Subaru Select Monitor">
Is the value of «Battery current value» 100 A or more?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1531 BATTERY CURRENT SENSOR CIRCUIT HIGH">Go to Step 2.
Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2.CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the battery current sensor.
3) Start the engine.
4) Read the value of «Battery current value» using the Subaru Select Monitor.
NOTE:
For detailed operation procedures, refer to “Current Data Display For Engine”. Subaru Select Monitor">
Is the value of «Battery current value» 100 A or more?
Repair the short circuit to power in the harness between ECM connector and battery current sensor connector.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1531 BATTERY CURRENT SENSOR CIRCUIT HIGH">Go to Step 3.
3.CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of the harness between the battery current sensor connector and engine ground.
Connector & terminal
(B538) No. 2 — Engine ground:
Is the resistance less than 5 ??
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1531 BATTERY CURRENT SENSOR CIRCUIT HIGH">Go to Step 4.
Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit in harness between ECM connector and battery current sensor connector
• Poor contact of joint connector
4.CHECK FOR POOR CONTACT.
Check for poor contact of the battery current sensor connector.
Is there poor contact of the battery current sensor connector?
Repair the poor contact of the battery current sensor connector.
Replace the battery current sensor. Battery Current & Temperature Sensor">
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of battery current sensor.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
(1) | Hall IC | (2) | Chip condenser | (3) | Core |
3. EXECUTION CONDITION
Secondary Parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Elapsed time after starting the engine | > 1000 ms |
Engine speed | > 500 rpm |
Ignition switch | ON |
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
Output voltage | ≥ 4.717 V |
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Does not illuminate even when malfunction occurs.
Rear seatbelts (except rear center seatbelt)
1. Sit well back in the seat.
2. Pick up the tongue plate and pull the
belt out slowly. Do not let it get twisted.
If the belt stops before reaching the
buckle, return the belt slightly and pull
it out more slowly.
If the belt still cannot be unlocked,
let the belt retract slightly a ...
Electrical component location Location
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Control screen and audio panel
Select to display the audio source
selection screen.
Select to change the band.
The HD Radio indicator on the top
right of the screen changes according
to the reception condition of HD
Radio (if equipped).
Select to display a station list (if
equipped). Refer to "Selecting a
...