LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostics) (P0700 To P2097) (H4DOTC) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1532 Battery Charging System >> Notes

DTC P1532 Battery Charging System: Notes

DTC detecting condition: 

Immediately at fault recognition

CAUTION:

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM .

Fig 1: Battery Charging System - Wiring Diagram
G10410041Courtesy of SUBARU OF AMERICA, INC.
  1. CHECK INSTALLATION CONDITION OF BATTERY. 

    Turn the ignition switch to OFF.

    Are the positive and negative terminals of battery securely tightened?

    • Yes  : Go to 2. 
    • No  : Tighten the positive and negative terminals of battery securely.
  2. CHECK BATTERY TERMINAL. 

    Is there any connection of electrical parts to the positive and negative terminals of battery?

    • Yes  : Remove the wiring of electrical parts connected to the positive and negative terminals of battery.
      NOTE: Direct connection with any electrical parts may cause the erroneous operation of battery current & temperature sensor.
    • No  : Go to 3. 
  3. CHECK INSTALLATION CONDITION OF V-BELT. 

    Check the installation condition of V-belt. Ref. to MECHANICAL(H4DOTC)>V-belt>INSPECTION .

    Is the V-belt installed properly?

  4. CHECK BATTERY VOLTAGE. 
    1. Start the engine.
    2. Select "High mode" from "Alternator control" in "System Operation Check Mode", and measure the battery voltage after 10 seconds or more have passed.
      NOTE: For detailed procedures, refer to "Active Test". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Active Test .
    3. Select "Low mode" from "Alternator control" in "System Operation Check Mode", and measure the battery voltage.
      CAUTION: Do not continue the "Low mode" operation for one minute or more.
      NOTE: For detailed procedures, refer to "Active Test". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Active Test .

      Does the battery voltage decrease from 13.9 - 14.8 V to 12.2 - 13.1 V while executing step 2) and step 3)?

      • Yes  : Go to  7.
      • No  : Go to 5. 
  5. CHECK HARNESS BETWEEN ECM AND GENERATOR CONNECTOR. 
    1. Turn the ignition switch to OFF.
    2. Disconnect the connector from the generator.
    3. Disconnect the connector from ECM.
    4. Measure the resistance of harness between ECM and generator connector.

      Connector & terminal 

      (B134) No. 26 - (F26) No. 3:

      Is the resistance less than 1 Ω?

      • Yes  : Go to 6. 
      • No  : Repair the open circuit of harness between ECM and generator connector.
  6. CHECK HARNESS BETWEEN ECM AND GENERATOR CONNECTOR. 

    Measure the resistance between generator connector and engine ground.

    Connector & terminal 

    (F26) No. 3 - Engine ground:

    Is the resistance 1 MΩ or more?

    • Yes  : Go to 7. 
    • No  : Repair the ground short circuit of harness between ECM and generator connector.
  7. CHECK BATTERY CURRENT & TEMPERATURE SENSOR. 

    Has water entered the connector?

    • Yes  : Completely remove any water inside.
    • No  : Go to 8. 
  8. CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT & TEMPERATURE SENSOR CONNECTOR. 
    1. Disconnect the connectors from the battery current & temperature sensor.
    2. Disconnect the connector from ECM.
    3. Measure the resistance of harness between ECM and battery current & temperature sensor connector.

      Connector & terminal 

      (B134) No. 18 - (B472) No. 2:

      (B134) No. 42 - (B472) No. 3:

      Is the resistance less than 1 Ω?

      • Yes  : Go to 9. 
      • No  : Repair the open circuit of harness between ECM and battery current & temperature sensor connector.
  9. CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT & TEMPERATURE SENSOR CONNECTOR. 

    Measure the resistance between ECM and engine ground.

    Connector & terminal 

    (B134) No. 18 - Engine ground:

    (B134) No. 42 - Engine ground:

    Is the resistance 1 MΩ or more?

    • Yes  : Go to 10. 
    • No  : Repair the ground short circuit of harness between ECM and battery current & temperature sensor connector.
  10. CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT & TEMPERATURE SENSOR CONNECTOR. 

    Measure the resistance between ECM connectors.

    Connector & terminal 

    (B134) No. 18 - (B134) No. 42:

    Is the resistance 1 MΩ or more?

    • Yes  : Go to 11. 
    • No  : Repair the short circuit to power supply in harness between ECM and battery current & temperature sensor connector.
  11. CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT & TEMPERATURE SENSOR CONNECTOR. 
    1. Connect the connector to ECM.
    2. Measure the resistance of harness between battery current & temperature sensor connector and engine ground.

      Connector & terminal 

      (B472) No. 4 - Engine ground:

    Is the resistance less than 5 Ω?

    • Yes  : Go to 12. 
    • No  : repair the harness and connector.
    NOTE: In this case, repair the following item:
    • Open circuit in harness between ECM and battery current & temperature sensor connector
    • Poor contact of joint connector
  12. CHECK FOR POOR CONTACT. 

    Check for poor contact of battery current & temperature sensor connector.

    Is there poor contact of battery current & temperature sensor connector?

scientia non olet · About LEMON Manuals