DTC P0ADB-227: Hybrid Battery Positive Contactor Control Circuit Low; DTC P0ADC-226: Hybrid Battery Positive Contactor Control Circuit High: Procedure

1. Disconnect connector A58 from the hybrid vehicle control ECU.
2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying A58 Hybrid Vehicle Control ECU From The Hybrid Vehicle Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A58-60 (SMRB) - Body ground	Power switch on (IG)	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Hybrid Vehicle Control ECU)

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

4. Turn the power switch off.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A58-60 (SMRB) - Body ground	Power switch off -31 to 176 °F (-35 to 80°C)	18.8 to 32.1Ω

6. Connect the hybrid vehicle control ECU connector.

NG → See step   3 

OK: Go to next step 

1. Check for intermittent problems. Refer toCHECK FOR INTERMITTENT PROBLEMS .

   Result

   Result	Proceed to
   Malfunction does not occur	A
   Malfunction occurs	B

B → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

A → See step   6 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair service information because this may cause a malfunction.

2. Disconnect connector z16 from the hybrid battery junction block assembly.
3. Disconnect connector A58 from the hybrid vehicle control ECU.
4. Turn the power switch on (IG).
   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU and hybrid battery junction block assembly connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

5. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying A58 Hybrid Vehicle Control ECU & z16 HV Battery J/B Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A58-60 (SMRB) and z16-3 (SMRB) - Body ground	Power switch on (IG)	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Hybrid Vehicle Control ECU)
   *2	Rear view of wire harness connector (to Hybrid Battery Junction Block Assembly)

6. Turn the power switch off.
7. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A58-60 (SMRB) - z16-3 (SMRB)	Power switch off	Below 1 Ω
   A58-60 (SMRB) and z16-3 (SMRB) - Body ground and other terminals	Power switch off	10 kΩ or higher

8. Connect the hybrid vehicle control ECU connector.
9. Connect the hybrid battery junction block assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair service information because this may cause a malfunction.

2. Disconnect connector z16 from the hybrid battery junction block assembly.
3. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying z16 HV Battery From J/B Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   z16-2 (GND) - Body ground	Power switch off	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Rear view of wire harness connector (to Hybrid Battery Junction Block Assembly)

4. Connect the hybrid battery junction block assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5