DTC P0AE6-225: Hybrid Battery Precharge Contactor Control Circuit Low; DTC P0AE7-224: Hybrid Battery Precharge Contactor Control Circuit High: Procedure

1. Disconnect connector D72 from the hybrid vehicle control ECU.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.
   Fig 1: Checking Harness And Connector (Hybrid Vehicle Control ECU - Hybrid Battery Junction Block)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D72-3 (SMRP) - Body ground	Ignition switch ON	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

   NOTE:

   Turning the ignition switch to ON with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   D72-3 (SMRP) - Body ground	Ignition switch off	141 to 212 Ω

6. Connect the hybrid vehicle control ECU connector.

NG → See step   3 

OK: Go to next step 

1. Check for intermittent problems. Refer to CHECK 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 ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the battery cover sub-assembly. Refer to REMOVAL .
3. Disconnect connector z20 from the hybrid battery junction block assembly.
4. Disconnect connector D72 from the hybrid vehicle control ECU.
5. Turn the ignition switch to ON.
   NOTE:

   Turning the ignition switch to ON 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.

6. Measure the voltage according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Hybrid Vehicle Control ECU - Hybrid Battery Junction Block)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D72-3 (SMRP) and z20-3 (SMRP) - Body ground	Ignition switch ON	Below 1 V

   TEXT IN ILLUSTRATION
   
   

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

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   D72-3 (SMRP) - z20-3 (SMRP)	Ignition switch off	Below 1 Ω
   D72-3 (SMRP) and z20-3 (SMRP) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

9. Connect the hybrid vehicle control ECU connector.
10. Connect the hybrid battery junction block assembly connector.
11. Install the battery cover sub-assembly. Refer to INSTALLATION .

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 ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the battery cover sub-assembly. Refer to REMOVAL .
3. Disconnect connector z20 from the hybrid battery junction block assembly.
4. Measure the resistance according to the value(s) in the table below.
   Fig 3: Checking Harness And Connector (Hybrid Battery Junction Block Assembly - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   z20-2 (GND) - Body ground	Ignition switch off	Below 1 Ω

5. Connect the hybrid battery junction block assembly connector.
6. Install the battery cover sub-assembly. Refer to INSTALLATION .

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5