CHARGING SYSTEM, Diagnostic DTC:P1602

DESCRIPTION

The power management control ECU monitors the battery. When the engine is running (not cranking) and the battery voltage drops below a specified level, the ECU determines that there is battery deterioration and stores this DTC.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK FOR DTC

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the tester on.

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

      Table 1. Result

      Result	Proceed to
      Only DTC P1602 is output.	A
      Other DTCs are output in addition to DTC P1602.	B

   
   
   • AClick here
   • BClick here
2. Click here

   CHECK CHARGING SYSTEM

   
   

   1. Check the charging system (Click here).

      Table 2. 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
3. Click here

   CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

   
   
   1. 

      Disconnect the H71 power management control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition H71-2 (AM21) - Body ground Always 9.5 to 16 V H71-1 (AM22) - Body ground

      Table 3. Text in Illustration

      *1	Rear view of wire harness connector (to Power Management Control ECU)

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

   
   
   1. 

      Disconnect the H72 power management control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition H72-8 (AM21) - Body ground Always 9.5 to 16 V

      Table 4. Text in Illustration

      *1	Rear view of wire harness connector (to Power Management Control ECU)

   
   
   • OKClick here
   • NGClick here
5. Click here

   CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

   
   
   1. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition H71-6 (GND) - Body ground Always Below 1 Ω

      Table 5. Text in Illustration

      *1	Rear view of wire harness connector (to Power Management Control ECU)

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

   
   
   1. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition H72-12 (GND) - Body ground Always Below 1 Ω

      Table 6. Text in Illustration

      *1	Rear view of wire harness connector (to Power Management Control ECU)

   
   
   • OKClick here
   • NGClick here
7. Click here

   GO TO DIAGNOSTIC TROUBLE CODE CHARTClick here

8. Click here

   REPAIR OR REPLACE CHARGING SYSTEM

9. Click here

   USE SIMULATION METHOD TO CHECKClick here

10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)