DTC P1550-P1552; Battery Current Sensor Circuit [12/2012 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Charging Control / Trouble Codes.
5. Read the DTCs.

   Body Electrical > Charging Control > Trouble Codes 

   HINT: 

   If any DTCs other than P1550, P1551 or P1552 are output, troubleshoot those DTCs first.

Result: 

DTC P1550, P1551 or P1552 and other DTCs are output 

GO TO DTC CHART:  DIAGNOSTIC TROUBLE CODE CHART [12/2012 - ] 

Result: 

DTC P1550, P1551 or P1552 is output 

See step  2

1. Turn all of the electrical systems (headlights, blower motor, rear defogger, etc.) off.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical / Charging Control / Data List / Battery Current.

   Body Electrical > Charging Control > Data List 

   Tester Display
   Battery Current

   Result

   Result	Proceed to
   Battery current is fixed at 0 A, or fluctuates by +/- 1 A or less between -100 and 100 A	A
   Battery current fluctuates between -20 and 0 A	B

Result: 

B 

CHECK FOR INTERMITTENT PROBLEMS:  HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - 11/2013]  ,  HOW TO PROCEED WITH TROUBLESHOOTING [11/2013 - 10/2015]  ,  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - 08/2016]  ,  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 08/2017]  ,  HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] 

Result: 

A 

See step  3

1. Disconnect the A58 generator control ECU assembly connector.
2. Disconnect the B62 generator assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A58-6 (LIN1) - B62-1 (LIN)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A58-6 (LIN1) or B62-1 (LIN) - Body ground	Ignition switch off (while LIN communication is stopped)	10 kΩ or higher

Result: 

OK 

REPLACE GENERATOR CONTROL ECU ASSEMBLY (BATTERY CURRENT SENSOR):  REMOVAL [12/2012 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR