DTC P0AC0-817: EV Battery Pack Current Sensor "A" Circuit Range / Performance: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Trouble Codes.
4. Check if DTCs related to the EV control system are output.

   Result

   Result	Proceed to
   Only P0AC0-817 is output or DTCs other than the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P060B-134, 135, 570	Internal Control Module A/D Processing Performance
   P06A4-209	Sensor Reference Voltage "D" Circuit Low
   P06A5-210	Sensor Reference Voltage "D" Circuit High
   P0A08-264	DC/DC Converter Status Circuit
   P0A1D-148	EV Control Module
   P0A1F-832, 833	Battery Energy Control Module
   P2511-149	ECM/PCM Power Relay Sense Circuit Intermittent
   P33A2-123	Total Power Resource IB Sensor Circuit Low
   P33A3-123	Total Power Resource IB Sensor Circuit High
   U0111-826	Lost Communication with Drive Motor Control Module "A"

   HINT: 

   P0AC0-817 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

5. Turn the power switch off.

B → See step   13 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV Battery / Trouble Codes.
4. Check if DTCs related to the EV battery control system are output.

   Result

   Result	Proceed to
   DTCs related to EV Battery are not output, or DTCs other than the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P0ABF-123	EV Battery No. 1 Pack Current Sensor "A" Circuit
   P0AC0-123	EV Battery No. 1 Pack Current Sensor "A" Circuit Range / Performance
   P0AC1-123	EV Battery No. 1 Pack Current Sensor "A" Circuit Low
   P0AC2-123	EV Battery No. 1 Pack Current Sensor "A" Circuit High
   P0AFC-123	EV Battery No. 1 Pack Sensor Module
   P300E-123	EV Battery No. 2 Pack Sensor Module
   P329A-123	EV Battery No. 2 Pack Current Sensor "A" Circuit
   P329B-123	EV Battery No. 2 Pack Current Sensor "A" Circuit Range / Performance
   P329C-123	EV Battery No. 2 Pack Current Sensor "A" Circuit Low
   P329D-123	EV Battery No. 2 Pack Current Sensor "A" Circuit High

   HINT: 

   P0AC0-817 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

5. Turn the power switch off.

B → See step   15 

A: Go to next step 

1. Check the auxiliary battery voltage.

   Result

   Result	Proceed to
   11 V or higher	OK
   Below 11 V	NG

NG → CHARGE OR REPLACE AUXILIARY BATTERY 

OK: Go to next step 

NG → CONNECT SECURELY 

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 information because this may cause a malfunction.

   NOTE:

   Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

   Fig 1: Identifying Electric Vehicle Battery Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the connection of the electric vehicle battery assembly connector.

   OK

   The connector is connected securely and there are no contact problems.

   HINT: 

   When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.

NG → CONNECT SECURELY 

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 information because this may cause a malfunction.

2. Disconnect the power management control ECU connector.
3. Disconnect the electric vehicle battery assembly connector.
   Fig 2: Identifying Electric Vehicle Battery Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Measure the resistance according to the value(s) in the table below.
   Fig 3: Measuring Resistance Of Power Management Control ECU - Electric Vehicle Battery Assembly Harness & Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   C22-7 (VTIB) - Gi1-5	Power switch off	Below 1 Ω
   C22-1 (TIB) - Gi1-4	Power switch off	Below 1 Ω
   C22-2 (GTIB) - Gi1-6	Power switch off	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Electric Vehicle Battery Assembly)
   *b	Rear view of wire harness connector (to Power Management Control ECU)

5. Reconnect the electric vehicle battery assembly connector.
6. Reconnect the power management control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.
   Fig 4: Measuring Voltage Of Power Management Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   C22-7 (VTIB) - C22-2 (GTIB)	Power switch on (IG)	4.5 to 5.5 V

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   12 

OK: Go to next step 

1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.
   Fig 5: Measuring Voltage Of Power Management Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   C22-1 (TIB) - C22-2 (GTIB)	Power switch on (IG)	2.76 to 2.84 V

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   14 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Data List / Total Power Resource IB Sensor Voltage.
4. Read the Data List.

   Result

   Techstream Display	Switch Condition	Specified Condition
   Total Power Resource IB Sensor Voltage	Power switch on (IG)	2.76 to 2.84 V

NG → See step   12 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Data List / Battery No. 1 Power Resource IB, Battery No. 2 Power Resource IB.
4. Read the Data List.

   Result

   Techstream Display	Switch Condition	Specified Condition
   Battery No. 1 Current Value	Power switch on (IG)	-4 to 4 A
   Battery No. 2 Current Value	Power switch on (IG)	-4 to 4 A

NG → See step   16 

OK: Go to next step 

Refer to COMPONENTS

NEXT → See step   18 

1. Even though it has been determined that the power management control ECU needs to be replaced, make sure to inspect the voltage difference between No. 1 EV battery and No. 2 EV battery before replacing it.

NEXT → See step   17