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Subaru Crosstrek Service Manual: Dtc p1530 battery current sensor circuit low

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P1530 BATTERY CURRENT SENSOR CIRCUIT LOW

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">

STEPCHECKYESNO

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 less?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1530 BATTERY CURRENT SENSOR CIRCUIT LOW">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 ECM.

3) Disconnect the connector from the battery current sensor.

4) Measure the resistance of the harness between ECM connector and battery current sensor connector.

Connector & terminal

(B135) No. 22 — (B538) No. 3:

(B137) No. 11 — (B538) No. 1:

Is the resistance less than 1 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1530 BATTERY CURRENT SENSOR CIRCUIT LOW">Go to Step 3.

Repair the open circuit in the harness between ECM connector and battery current sensor connector.

3.CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT SENSOR CONNECTOR.

Measure the resistance between ECM connector and chassis ground.

Connector & terminal

(B135) No. 22 — Chassis ground:

(B137) No. 11 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1530 BATTERY CURRENT SENSOR CIRCUIT LOW">Go to Step 4.

Repair the short circuit to ground in the harness between ECM connector and battery current sensor connector.

4.CHECK FOR POOR CONTACT.

Check for poor contact between the ECM and battery current sensor connectors.

Is there poor contact of the ECM or battery current sensor connectors?

Repair any poor contact between the ECM and battery current sensor connectors.

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.

Judgment Value

Malfunction Criteria

Threshold Value

Output voltage

< 0.2148 V

Time Needed for Diagnosis: 500 ms

Malfunction Indicator Light Illumination: Does not illuminate even when malfunction occurs.

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