HYBRID BATTERY SYSTEM, Diagnostic DTC:P1AC49E, P1AC59E, P1AC69E, P1AC79E, P1AC89E

DTC Code	DTC Name
P1AC49E	Hybrid/EV Battery Stack 1 Current Interrupt Device Stuck On
P1AC59E	Hybrid/EV Battery Stack 2 Current Interrupt Device Stuck On
P1AC69E	Hybrid/EV Battery Stack 3 Current Interrupt Device Stuck On
P1AC79E	Hybrid/EV Battery Stack 4 Current Interrupt Device Stuck On
P1AC89E	Hybrid/EV Battery Stack 5 Current Interrupt Device Stuck On

DESCRIPTION

Refer to the description for DTC P1AC413.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P1AC49E	Hybrid/EV Battery Stack 1 Current Interrupt Device Stuck On	Conductivity returns after high voltage circuit disconnected by CID operation. (1 trip detection logic)	No. 1 HV supply stack sub-assembly Battery ECU assembly	Comes on	Master Warning Light: Comes on
P1AC59E	Hybrid/EV Battery Stack 2 Current Interrupt Device Stuck On	Conductivity returns after high voltage circuit disconnected by CID operation. (1 trip detection logic)	No. 2 HV supply stack sub-assembly Battery ECU assembly	Comes on	Master Warning Light: Comes on
P1AC69E	Hybrid/EV Battery Stack 3 Current Interrupt Device Stuck On	Conductivity returns after high voltage circuit disconnected by CID operation. (1 trip detection logic)	No. 3 HV supply stack sub-assembly Battery ECU assembly	Comes on	Master Warning Light: Comes on
P1AC79E	Hybrid/EV Battery Stack 4 Current Interrupt Device Stuck On	Conductivity returns after high voltage circuit disconnected by CID operation. (1 trip detection logic)	No. 4 HV supply stack sub-assembly Battery ECU assembly	Comes on	Master Warning Light: Comes on
P1AC89E	Hybrid/EV Battery Stack 5 Current Interrupt Device Stuck On	Conductivity returns after high voltage circuit disconnected by CID operation. (1 trip detection logic)	No. 5 HV supply stack sub-assembly Battery ECU assembly	Comes on	Master Warning Light: Comes on

Related Data List
DTC No.	Data List
P1AC49E	Hybrid Battery Cell 1 to 95 Voltage Hybrid Battery Cell 1 to 95 Internal Resistance
P1AC59E
P1AC69E
P1AC79E
P1AC89E

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

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Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and wait for 10 seconds or more.
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (READY) and turn the GTS on.
With power switch on (READY) and wait for 30 seconds or more.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
Tech Tips
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

CAUTION / NOTICE / HINT

CAUTION:

Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.

Inspecting the high-voltage system
Disconnecting the low voltage connector of the inverter with converter assembly
Disconnecting the low voltage connector of the HV battery
Disconnecting the low voltage connector of the electric vehicle charger assembly
Disconnecting the low voltage connector of the solar energy control unit

To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
*a Without waiting for 10 minutes

After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

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Tech Tips

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and the electric vehicle charger assembly.
*a Dealer

*b Battery Collection Agent

When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.

Before returning the HV battery, make sure to perform a recovery inspection.

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Before returning the HV supply stack sub-assembly, make sure to perform a recovery inspection.

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Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and HV supply stack sub-assemblies.
After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE

CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / HV Battery and Hybrid Control / Trouble Codes.

Check for DTCs.

Powertrain > HV Battery > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes

Result

Result	Proceed to
"P1AC49E, P1AC59E, P1AC69E, P1AC79E or P1AC89E" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Turn the power switch off.

GO TO DTC CHART (HYBRID BATTERY SYSTEM) Click here

GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

CHECK DTC

Check the DTCs that were output when the vehicle was brought to the workshop.

Result

Result	Proceed to
"P1AC49E" is also output.	A
"P1AC59E" is also output.	B
"P1AC69E" is also output.	C
"P1AC79E" is also output.	D
"P1AC89E" is also output.	E

CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR) Click here

CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

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 manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly.

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Check the connections of the z20 battery ECU assembly connector.

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OK

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

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

Install the upper hybrid battery cover sub-assembly.

Result

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY Click here

CHECK BATTERY ECU ASSEMBLY (VA1 - VA19)

Note

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage.

Remove the battery ECU assembly.

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Measure the voltage according to the value(s) in the table below.

Component without harness connected

(Battery ECU Assembly)

Standard Voltage

Hybrid Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
1	z20-1 (GA0) (+) - z20-6 (VA1) (-)	Always	0.3 to 1.0 V
2	z20-6 (VA1) (+) - z20-11 (VA2) (-)	Always	0.3 to 1.0 V
3	z20-11 (VA2) (+) - z20-16 (VA3) (-)	Always	0.3 to 1.0 V
4	z20-16 (VA3) (+) - z20-2 (VA4) (-)	Always	0.3 to 1.0 V
5	z20-2 (VA4) (+) - z20-7 (VA5) (-)	Always	0.3 to 1.0 V
6	z20-7 (VA5) (+) - z20-12 (VA6) (-)	Always	0.3 to 1.0 V
7	z20-12 (VA6) (+) - z20-17 (VA7) (-)	Always	0.3 to 1.0 V
8	z20-17 (VA7) (+) - z20-3 (VA8) (-)	Always	0.3 to 1.0 V
9	z20-3 (VA8) (+) - z20-8 (VA9) (-)	Always	0.3 to 1.0 V
10	z20-8 (VA9) (+) - z20-13 (VA10) (-)	Always	0.3 to 1.0 V
11	z20-13 (VA10) (+) - z20-18 (VA11) (-)	Always	0.3 to 1.0 V
12	z20-18 (VA11) (+) - z20-4 (VA12) (-)	Always	0.3 to 1.0 V
13	z20-4 (VA12) (+) - z20-9 (VA13) (-)	Always	0.3 to 1.0 V
14	z20-9 (VA13) (+) - z20-14 (VA14) (-)	Always	0.3 to 1.0 V
15	z20-14 (VA14) (+) - z20-19 (VA15) (-)	Always	0.3 to 1.0 V
16	z20-19 (VA15) (+) - z20-5 (VA16) (-)	Always	0.3 to 1.0 V
17	z20-5 (VA16) (+) - z20-10 (VA17) (-)	Always	0.3 to 1.0 V
18	z20-10 (VA17) (+) - z20-15 (VA18) (-)	Always	0.3 to 1.0 V
19	z20-15 (VA18) (+) - z20-20 (VA19) (-)	Always	0.3 to 1.0 V

Note

Make sure to check the polarity of each terminal (positive (+) or negative (-)) before connecting a tester.
Be sure to set the toyota electrical tester to diode range when performing this test.
Read the voltage after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of the battery ECU assembly.

Install the battery ECU assembly.

Result

Result	Proceed to
The voltage between the terminals is 0.3 to 1.0 V.	A
Other than above	B

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY

Click here

Result

Proceed to
NEXT

REPLACE BATTERY ECU ASSEMBLY Click here

CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

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 manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly.

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Check the connections of the z21 battery ECU assembly connector.

Click here

OK

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

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

Install the upper hybrid battery cover sub-assembly.

Result

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY Click here

CHECK BATTERY ECU ASSEMBLY (VA20 - VA38)

Note

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage.

Remove the battery ECU assembly.

Click here

Measure the voltage according to the value(s) in the table below.

Component without harness connected

(Battery ECU Assembly)

Standard Voltage

Hybrid Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
20	z21-1 (GA1) (+) - z21-6 (VA20) (-)	Always	0.3 to 1.0 V
21	z21-6 (VA20) (+) - z21-11 (VA21) (-)	Always	0.3 to 1.0 V
22	z21-11 (VA21) (+) - z21-16 (VA22) (-)	Always	0.3 to 1.0 V
23	z21-16 (VA22) (+) - z21-2 (VA23) (-)	Always	0.3 to 1.0 V
24	z21-2 (VA23) (+) - z21-7 (VA24) (-)	Always	0.3 to 1.0 V
25	z21-7 (VA24) (+) - z21-12 (VA25) (-)	Always	0.3 to 1.0 V
26	z21-12 (VA25) (+) - z21-17 (VA26) (-)	Always	0.3 to 1.0 V
27	z21-17 (VA26) (+) - z21-3 (VA27) (-)	Always	0.3 to 1.0 V
28	z21-3 (VA27) (+) - z21-8 (VA28) (-)	Always	0.3 to 1.0 V
29	z21-8 (VA28) (+) - z21-13 (VA29) (-)	Always	0.3 to 1.0 V
30	z21-13 (VA29) (+) - z21-18 (VA30) (-)	Always	0.3 to 1.0 V
31	z21-18 (VA30) (+) - z21-4 (VA31) (-)	Always	0.3 to 1.0 V
32	z21-4 (VA31) (+) - z21-9 (VA32) (-)	Always	0.3 to 1.0 V
33	z21-9 (VA32) (+) - z21-14 (VA33) (-)	Always	0.3 to 1.0 V
34	z21-14 (VA33) (+) - z21-19 (VA34) (-)	Always	0.3 to 1.0 V
35	z21-19 (VA34) (+) - z21-5 (VA35) (-)	Always	0.3 to 1.0 V
36	z21-5 (VA35) (+) - z21-10 (VA36) (-)	Always	0.3 to 1.0 V
37	z21-10 (VA36) (+) - z21-15 (VA37) (-)	Always	0.3 to 1.0 V
38	z21-15 (VA37) (+) - z21-20 (VA38) (-)	Always	0.3 to 1.0 V

Note

Make sure to check the polarity of each terminal (positive (+) or negative (-)) before connecting a tester.
Be sure to set the toyota electrical tester to diode range when performing this test.
Read the voltage after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of the battery ECU assembly.

Install the battery ECU assembly.

Result

Result	Proceed to
The voltage between the terminals is 0.3 to 1.0 V.	A
Other than above	B

REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY

Click here

Result

Proceed to
NEXT

REPLACE BATTERY ECU ASSEMBLY Click here

CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

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 manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly.

Click here
Check the connections of the z22 battery ECU assembly connector.

Click here

OK

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

Install the upper hybrid battery cover sub-assembly.

Result

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE NO. 3 HV SUPPLY STACK SUB-ASSEMBLY Click here

CHECK BATTERY ECU ASSEMBLY (VA39 - VA57)

Note

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage.

Remove the battery ECU assembly.

Click here

Measure the voltage according to the value(s) in the table below.

Component without harness connected

(Battery ECU Assembly)

Standard Voltage

Hybrid Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
39	z22-1 (GA2) (+) - z22-6 (VA39) (-)	Always	0.3 to 1.0 V
40	z22-6 (VA39) (+) - z22-11 (VA40) (-)	Always	0.3 to 1.0 V
41	z22-11 (VA40) (+) - z22-16 (VA41) (-)	Always	0.3 to 1.0 V
42	z22-16 (VA41) (+) - z22-2 (VA42) (-)	Always	0.3 to 1.0 V
43	z22-2 (VA42) (+) - z22-7 (VA43) (-)	Always	0.3 to 1.0 V
44	z22-7 (VA43) (+) - z22-12 (VA44) (-)	Always	0.3 to 1.0 V
45	z22-12 (VA44) (+) - z22-17 (VA45) (-)	Always	0.3 to 1.0 V
46	z22-17 (VA45) (+) - z22-3 (VA46) (-)	Always	0.3 to 1.0 V
47	z22-3 (VA46) (+) - z22-8 (VA47) (-)	Always	0.3 to 1.0 V
48	z22-8 (VA47) (+) - z22-13 (VA48) (-)	Always	0.3 to 1.0 V
49	z22-13 (VA48) (+) - z22-18 (VA49) (-)	Always	0.3 to 1.0 V
50	z22-18 (VA49) (+) -z22-4 (VA50) (-)	Always	0.3 to 1.0 V
51	z22-4 (VA50) (+) - z22-9 (VA51) (-)	Always	0.3 to 1.0 V
52	z22-9 (VA51) (+) - z22-14 (VA52) (-)	Always	0.3 to 1.0 V
53	z22-14 (VA52) (+) - z22-19 (VA53) (-)	Always	0.3 to 1.0 V
54	z22-19 (VA53) (+) - z22-5 (VA54) (-)	Always	0.3 to 1.0 V
55	z22-5 (VA54) (+) - z22-10 (VA55) (-)	Always	0.3 to 1.0 V
56	z22-10 (VA55) (+) - z22-15 (VA56) (-)	Always	0.3 to 1.0 V
57	z22-15 (VA56) (+) - z22-20 (VA57) (-)	Always	0.3 to 1.0 V

Note

Make sure to check the polarity of each terminal (positive (+) or negative (-)) before connecting a tester.
Be sure to set the toyota electrical tester to diode range when performing this test.
Read the voltage after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of the battery ECU assembly.

Install the battery ECU assembly.

Result

Result	Proceed to
The voltage between the terminals is 0.3 to 1.0 V.	A
Other than above	B

REPLACE NO. 3 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 3 HV SUPPLY STACK SUB-ASSEMBLY

Click here

Result

Proceed to
NEXT

REPLACE BATTERY ECU ASSEMBLY Click here

CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

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 manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly.

Click here
Check the connections of the z23 battery ECU assembly connector.

Click here

OK

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

Install the upper hybrid battery cover sub-assembly.

Result

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE NO. 4 HV SUPPLY STACK SUB-ASSEMBLY Click here

CHECK BATTERY ECU ASSEMBLY (VA58 - VA76)

Note

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage.

Remove the battery ECU assembly.

Click here

Measure the voltage according to the value(s) in the table below.

Component without harness connected

(Battery ECU Assembly)

Standard Voltage

Hybrid Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
58	z23-1 (GA3) (+) - z23-6 (VA58) (-)	Always	0.3 to 1.0 V
59	z23-6 (VA58) (+) - z23-11 (VA59) (-)	Always	0.3 to 1.0 V
60	z23-11 (VA59) (+) - z23-16 (VA60) (-)	Always	0.3 to 1.0 V
61	z23-16 (VA60) (+) - z23-2 (VA61) (-)	Always	0.3 to 1.0 V
62	z23-2 (VA61) (+) - z23-7 (VA62) (-)	Always	0.3 to 1.0 V
63	z23-7 (VA62) (+) - z23-12 (VA63) (-)	Always	0.3 to 1.0 V
64	z23-12 (VA63) (+) - z23-17 (VA64) (-)	Always	0.3 to 1.0 V
65	z23-17 (VA64) (+) - z23-3 (VA65) (-)	Always	0.3 to 1.0 V
66	z23-3 (VA65) (+) - z23-8 (VA66) (-)	Always	0.3 to 1.0 V
67	z23-8 (VA66) (+) - z23-13 (VA67) (-)	Always	0.3 to 1.0 V
68	z23-13 (VA67) (+) - z23-18 (VA68) (-)	Always	0.3 to 1.0 V
69	z23-18 (VA68) (+) -z23-4 (VA69) (-)	Always	0.3 to 1.0 V
70	z23-4 (VA69) (+) - z23-9 (VA70) (-)	Always	0.3 to 1.0 V
71	z23-9 (VA70) (+) - z23-14 (VA71) (-)	Always	0.3 to 1.0 V
72	z23-14 (VA71) (+) - z23-19 (VA72) (-)	Always	0.3 to 1.0 V
73	z23-19 (VA72) (+) - z23-5 (VA73) (-)	Always	0.3 to 1.0 V
74	z23-5 (VA73) (+) - z23-10 (VA74) (-)	Always	0.3 to 1.0 V
75	z23-10 (VA74) (+) - z23-15 (VA75) (-)	Always	0.3 to 1.0 V
76	z23-15 (VA75) (+) - z23-20 (VA76) (-)	Always	0.3 to 1.0 V

Note

Make sure to check the polarity of each terminal (positive (+) or negative (-)) before connecting a tester.
Be sure to set the toyota electrical tester to diode range when performing this test.
Read the voltage after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of the battery ECU assembly.

Install the battery ECU assembly.

Result

Result	Proceed to
The voltage between the terminals is 0.3 to 1.0 V.	A
Other than above	B

REPLACE NO. 4 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 4 HV SUPPLY STACK SUB-ASSEMBLY

Click here

Result

Proceed to
NEXT

REPLACE BATTERY ECU ASSEMBLY Click here

CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

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 manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly.

Click here
Check the connections of the z24 battery ECU assembly connector.

Click here

OK

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

Install the upper hybrid battery cover sub-assembly.

Result

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE NO. 5 HV SUPPLY STACK SUB-ASSEMBLY Click here

CHECK BATTERY ECU ASSEMBLY (VA77 - VA95)

Note

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage.

Remove the battery ECU assembly.

Click here

Measure the voltage according to the value(s) in the table below.

Component without harness connected

(Battery ECU Assembly)

Standard Voltage

Hybrid Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
77	z24-1 (GA4) (+) - z24-6 (VA77) (-)	Always	0.3 to 1.0 V
78	z24-6 (VA77) (+) - z24-11 (VA78) (-)	Always	0.3 to 1.0 V
79	z24-11 (VA78) (+) - z24-16 (VA79) (-)	Always	0.3 to 1.0 V
80	z24-16 (VA79) (+) - z24-2 (VA80) (-)	Always	0.3 to 1.0 V
81	z24-2 (VA80) (+) - z24-7 (VA81) (-)	Always	0.3 to 1.0 V
82	z24-7 (VA81) (+) - z24-12 (VA82) (-)	Always	0.3 to 1.0 V
83	z24-12 (VA82) (+) - z24-17 (VA83) (-)	Always	0.3 to 1.0 V
84	z24-17 (VA83) (+) - z24-3 (VA84) (-)	Always	0.3 to 1.0 V
85	z24-3 (VA84) (+) - z24-8 (VA85) (-)	Always	0.3 to 1.0 V
86	z24-8 (VA85) (+) - z24-13 (VA86) (-)	Always	0.3 to 1.0 V
87	z24-13 (VA86) (+) - z24-18 (VA87) (-)	Always	0.3 to 1.0 V
88	z24-18 (VA87) (+) -z24-4 (VA88) (-)	Always	0.3 to 1.0 V
89	z24-4 (VA88) (+) - z24-9 (VA89) (-)	Always	0.3 to 1.0 V
90	z24-9 (VA89) (+) - z24-14 (VA90) (-)	Always	0.3 to 1.0 V
91	z24-14 (VA90) (+) - z24-19 (VA91) (-)	Always	0.3 to 1.0 V
92	z24-19 (VA91) (+) - z24-5 (VA92) (-)	Always	0.3 to 1.0 V
93	z24-5 (VA92) (+) - z24-10 (VA93) (-)	Always	0.3 to 1.0 V
94	z24-10 (VA93) (+) - z24-15 (VA94) (-)	Always	0.3 to 1.0 V
95	z24-15 (VA94) (+) - z24-20 (VA95) (-)	Always	0.3 to 1.0 V

Note

Make sure to check the polarity of each terminal (positive (+) or negative (-)) before connecting a tester.
Be sure to set the toyota electrical tester to diode range when performing this test.
Read the voltage after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of the battery ECU assembly.

Install the battery ECU assembly.

Result

Result	Proceed to
The voltage between the terminals is 0.3 to 1.0 V.	A
Other than above	B

REPLACE NO. 5 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 5 HV SUPPLY STACK SUB-ASSEMBLY

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Result

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REPLACE BATTERY ECU ASSEMBLY Click here

*a	Dealer
*b	Battery Collection Agent