DTC P1530: Short in Battery Current Sensor Circuit; DTC P1531: Open in Battery Current Sensor Circuit; DTC P1532: Battery Current Sensor Circuit: 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: Powertrain / Engine / DTC.
5. Read the DTC.
   RESULT
   
   

   Result	Proceed to
   DTC P1530, P1531 and P1532 are output	A
   DTC P1530, P1531, P1532 and other DTCs are output	B

   HINT: 

   If any DTCs other than P1530, P1531 and P1532 are output, troubleshoot those DTCs first.

B → See step   7 

A: Go to next step 

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: Powertrain / Engine / Data List / 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

B → See step   8 

A: Go to next step 

1. Disconnect the cable from the negative (-) battery terminal.
   Fig 1: Inspecting Battery Current Sensor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A11 battery current sensor assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (VIN) - 3 (GND)	Always	3 to 10 kΩ
   1 (VIN) - 4 (IB)	Always	Below 0.5 kΩ
   3 (GND) - 4 (IB)	Always	3 to 10 kΩ

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Battery Current Sensor Assembly)

4. Reconnect the cable to the negative (-) battery terminal.

NG → See step   5 

OK: Go to next step 

1. Disconnect the A33 and A35 ECM connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A33-11 (IB) - A11-4 (IB)	Always	Below 1 Ω
   A35-22 (VCP2) - A11-1 (VIN)	Always	Below 1 Ω
   A35-30 (EPA2) - A11-3 (GND)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A33-11 (IB) or A11-4 (IB) - Body ground	Always	10 kΩ or higher
   A35-22 (VCP2) or A11-1 (VIN) - Body ground	Always	10 kΩ or higher
   A35-30 (EPA2) or A11-3 (GND) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6