CHARGING SYSTEM, Diagnostic DTC:P1550, P1551, P1552

DESCRIPTION

The battery current sensor assembly detects the battery charge and discharge current amount. The battery current sensor assembly changes this information into a voltage signal and outputs it to the power management control ECU. Based on this signal, the power management control ECU sends power generation voltage commands to the generator.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK FOR DTC

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Start the engine.

   3. Turn the tester on.

   4. According to the display on the tester, check for DTCs (Click here).

      Table 1. Result

      Result	Proceed to
      DTC P1550, P1551 or P1552 is output.	A
      DTCs other than P1550, P1551 and P1552 are output.	B

   
   
   • AClick here
   • BClick here
2. Click here

   READ VALUE USING INTELLIGENT TESTER (BATTERY CURRENT)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON and turn off all electrical devices (headlights, blower motor, wiper, rear defogger, etc.).

   3. Turn the tester on.

   4. Select the item below in the Data List, and read the display on the intelligent tester (Click here).

      Table 2. Charging Control

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Battery Current	Battery current / -100 to 100 A	Changes in response to generator power generation amount after engine warmed up while vehicle driven	-

      Table 3. Result

      Result	Proceed to
      Current value displayed on tester is fixed at 0 A and does not change, or only changes by 1 A or less between -98 and 98 A.	A
      Current value displayed on tester changes between -20 and 0 A.	B

   
   
   • AClick here
   • BClick here
3. Click here

   CHECK BATTERY CURRENT SENSOR ASSEMBLY

   
   
   1. 

      Disconnect the C50 battery current sensor connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition 2 (VC5) - 4 (E2) Always 3 to 10 kΩ 2 (VC5) - 3 (IB) Always Below 0.5 kΩ 3 (IB) - 4 (E2) Always 3 to 10 kΩ

      Table 4. Text in Illustration

      *1	Component without harness connected (Battery Current Sensor)

      Table 5. Result

      Result		Proceed to
      OK	w/ Entry and Start System	A
      	w/o Entry and Start System	B
      NG		C

   
   
   • AClick here
   • BClick here
   • CClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR)

   
   
   1. 

      Disconnect the H70 power management control ECU connector.

   2. Disconnect the C50 battery current sensor connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition H70-23 (VC) - C50-2 (VC5) Always Below 1 Ω H70-25 (E2) - C50-4 (E2) H70-30 (IB) - C50-3 (IB) H70-23 (VC) - Body ground Always 10 kΩ or higher H70-25 (E2) - Body ground H70-30 (IB) - Body ground

      Table 6. Text in Illustration

      *1	Rear view of wire harness connector (to Power Management Control ECU)
      *2	Front view of wire harness connector (to Battery Current Sensor)

      Table 7. Result

      Result		Proceed to
      OK	for LHD	A
      	for RHD	B
      NG		C

   
   
   • AClick here
   • BClick here
   • CClick here
5. Click here

   CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR)

   
   
   1. 

      Disconnect the H73 power management control ECU connector.

   2. Disconnect the C50 battery current sensor connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition H73-12 (VC) - C50-2 (VC5) Always Below 1 Ω H73-18 (E2) - C50-4 (E2) H73-13 (IB) - C50-3 (IB) H73-12 (VC) - Body ground Always 10 kΩ or higher H73-18 (E2) - Body ground H73-13 (IB) - Body ground

      Table 8. Text in Illustration

      *1	Rear view of wire harness connector (to Power Management Control ECU)
      *2	Front view of wire harness connector (to Battery Current Sensor)

      Table 9. Result

      Result		Proceed to
      OK	for LHD	A
      	for RHD	B
      NG		C

   
   
   • AClick here
   • BClick here
   • CClick here
6. Click here

   GO TO DIAGNOSTIC TROUBLE CODE CHARTClick here

7. Click here

   USE SIMULATION METHOD TO CHECKClick here

8. Click here

   REPLACE BATTERY CURRENT SENSOR ASSEMBLYClick here

9. Click here

   REPLACE POWER MANAGEMENT CONTROL ECUClick here

10. Click here

    REPLACE POWER MANAGEMENT CONTROL ECUClick here

11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR)