Speed Signal Circuit [09/2022 - 11/2022]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for TMC Made	A
   for TMMMS Made	B

Result: 

B 

See step  16

Result: 

A 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the signal waveform according to the condition(s) in the table below.

   Item	Condition
   Tester connection	I4-25 (SI) - Body ground
   Tool setting	5 V/DIV., 20 ms./DIV.
   Condition	Ignition switch ON, wheel being rotated

   NOTE:

   Perform the inspection from the back of the connector with the connector connected.

   HINT: 

   When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

   Result

   Result	Proceed to
   The measured waveform is similar to that in the illustration	A
   The measured waveform is not similar to that in the illustration (Stuck low)	B
   The measured waveform is not similar to that in the illustration (Stuck high)	C

Result: 

B 

See step  7

Result: 

C 

See step  12

Result: 

A 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the signal waveform according to the condition(s) in the table below.

   Item	Condition
   Tester connection	I4-8 (+S) - Body ground
   Tool setting	5 V/DIV., 20 ms./DIV.
   Condition	Ignition switch ON, wheel being rotated

   NOTE:

   Perform the inspection from the back of the connector with the connector connected.

   HINT: 

   • When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.
   • The waveform (B) changes depending on the connected ECUs.

   Result

   Result	Proceed to
   The measured waveform is similar to that in the illustration	A
   The measured waveform is not similar to that in the illustration (Stuck low)	B
   The measured waveform is not similar to that in the illustration (Stuck high)	C

Result: 

B 

See step  5

Result: 

C 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

A 

See step  4

1. Disconnect the A47 ECM*1 connector.
2. Disconnect the I68 stereo component amplifier assembly*2 connector.
3. Disconnect the I55 radio and display receiver assembly connector.
4. Disconnect the I4 combination meter assembly connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A47-42 (SPD) - I4-8 (+S)*1	Always	Below 1 Ω
   I68-11 (SPD) - I4-8 (+S)*2	Always	Below 1 Ω
   I55-27 (SPD) - I4-8 (+S)	Always	Below 1 Ω

   1. *1: for M20A-FKS
   2. *2: for JBL Model

   Result

   Proceed to
   OK
   NG

Result: 

OK 

CHECK THE VOLTAGE AT TERMINAL SPD OF EACH ECU 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect one of the connectors below.
   NOTE:

   After disconnecting a connector, perform all steps with all other ECUs connected.

   Terminal No. (Symbol)	ECU
   A47*1	ECM
   I68*2	Stereo component amplifier assembly
   I55	Radio and display receiver assembly

   1. *1: for M20A-FKS
   2. *2: for JBL Model
2. Measure the voltage according to the value(s) in the table below.
   NOTE:

   • Make sure to perform this inspection with the wheels stopped.
   • Perform the inspection from the back of the connector with the connector connected.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I4-8 (+S) - Body ground	Ignition switch ON	4.5 to 14 V

3. Repeat steps (a) and (b) for each connected ECU.

   HINT: 

   If the waveform changes to the waveform shown in the illustration after disconnecting a connector, an internal short in the disconnected ECU is suspected.

   Result

   Result	Proceed to
   After performing the inspection procedure for all connectors, the voltage did not change to the specified voltage	A
   When disconnecting the connector of the ECM, the voltage changed to the specified voltage	B
   When disconnecting the connector of the stereo component amplifier assembly, the voltage changed to the specified voltage (for JBL Model)	C
   When disconnecting the connector of the radio and display receiver assembly, the voltage changed to the specified voltage	D

Result: 

B 

REPLACE ECM 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

C 

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

D 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

A 

See step  6

1. Disconnect the A47 ECM*1 connector.
2. Disconnect the I68 stereo component amplifier assembly*2 connector.
3. Disconnect the I55 radio and display receiver assembly connector.
4. Disconnect the I4 combination meter assembly connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A47-42 (SPD)*1, I68-11 (SPD)*2 or I55-8 (SPD) - I4-8 (+S)	Always	Below 1 Ω
   A47-42 (SPD)*1, I68-11 (SPD)*2, I55-8 (SPD), or I4-8 (+S) - Body ground	Always	10 kΩ or higher

   1. *1: for M20A-FKS
   2. *2: for JBL Model

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Smart Key System	A
   w/o Smart Key System	B

Result: 

B 

See step  11

Result: 

A 

See step  8

1. Check if smart key system (for start function) DTCs are output.

   Body Electrical > Power Source Control > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO SMART KEY SYSTEM (FOR START FUNCTION) 

for HV Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

for Gasoline Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

Result: 

A 

See step  9

HINT: 

This procedure is performed to check the diode inside the combination meter assembly.

1. Remove the combination meter assembly.

   Refer to REMOVAL [09/2022 - 11/2022]

2. Measure the internal resistance of the combination meter assembly.

   Standard Resistance

   Tester Connection	Tester Connection	Condition	Measured Value
   I4-6 (IG+) - I4-25 (SI)	Positive (+) tester probe → I4-6 (IG+) Negative (-) tester probe → I4-25 (SI)	Always	A
   I4-6 (IG+) - I4-25 (SI)	Positive (+) tester probe → I4-25 (SI) Negative (-) tester probe → I4-6 (IG+)	Always	B

   OK

   There is a large difference between the measured value (A) and the measured value (B).

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

OK 

See step  10

1. Disconnect the I167 certification ECU (smart key ECU assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I167-28 (SPDO) - I4-25 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A51 skid control ECU (brake actuator assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A51-33 (SP1) - I4-25 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Smart Key System	A
   w/o Smart Key System	B

Result: 

B 

See step  15

Result: 

A 

See step  13

1. Check for smart key system (for start function) DTCs are output.

   Body Electrical > Power Source Control > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO SMART KEY SYSTEM (FOR START FUNCTION) 

for HV Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

for Gasoline Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

Result: 

A 

See step  14

1. Disconnect the I167 certification ECU (smart key ECU assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I167-28 (SPDO) - I4-25 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A51 skid control ECU (brake actuator assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A51-33 (SP1) - I4-25 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the signal waveform according to the condition(s) in the table below.

   Item	Condition
   Tester connection	I4-20 (SI) - Body ground
   Tool setting	5 V/DIV., 20 ms./DIV.
   Condition	Ignition switch ON, wheel being rotated

   NOTE:

   Perform the inspection from the back of the connector with the connector connected.

   HINT: 

   When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

   Result

   Result	Proceed to
   The measured waveform is similar to that in the illustration	A
   The measured waveform is not similar to that in the illustration (Stuck low)	B
   The measured waveform is not similar to that in the illustration (Stuck high)	C

Result: 

B 

See step  21

Result: 

C 

See step  29

Result: 

A 

See step  17

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the signal waveform according to the condition(s) in the table below.

   Item	Condition
   Tester connection	I4-36 (+S) - Body ground
   Tool setting	5 V/DIV., 20 ms./DIV.
   Condition	Ignition switch ON, wheel being rotated

   NOTE:

   Perform the inspection from the back of the connector with the connector connected.

   HINT: 

   • When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.
   • The waveform (B) changes depending on the connected ECUs.

   Result

   Result	Proceed to
   The measured waveform is similar to that in the illustration	A
   The measured waveform is not similar to that in the illustration (Stuck low)	B
   The measured waveform is not similar to that in the illustration (Stuck high)	C

Result: 

B 

See step  19

Result: 

C 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

A 

See step  18

1. Disconnect the A47*1 or A46*2 ECM connector.
2. Disconnect the I68 stereo component amplifier assembly*3 connector.
3. Disconnect the I55 radio and display receiver assembly connector.
4. Disconnect the I69 navigation ECU*4 connector.
5. Disconnect the C80 TCM*5 connector.
6. Disconnect the I4 combination meter assembly connector.
7. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A47-42 (SPD) - I4-36 (+S)*1	Always	Below 1 Ω
   A46-44 (SPD) - I4-36 (+S)*2	Always	Below 1 Ω
   I68-11 (SPD) - I4-36 (+S)*3	Always	Below 1 Ω
   I55-27 (SPD) - I4-36 (+S)	Always	Below 1 Ω
   I69-9 (SPD) - I4-36 (+S)*4	Always	Below 1 Ω
   C80-42 (SPD) - I4-36 (+S)*5	Always	Below 1 Ω

   1. *1: for M20A-FKS
   2. *2: for 2ZR-FAE
   3. *3: except 6 Speakers
   4. *4: w/ Navigation System
   5. *5: for M20A-FKS and CVT

   Result

   Proceed to
   OK
   NG

Result: 

OK 

CHECK THE VOLTAGE AT TERMINAL SPD OF EACH ECU 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect one of the connectors below.
   NOTE:

   After disconnecting a connector, perform all steps with all other ECUs connected.

   Terminal No. (Symbol)	ECU
   A47*1	ECM
   A46*2
   I68*3	Stereo component amplifier assembly
   I55	Radio and display receiver assembly
   I69*4	Navigation ECU
   C80*5	TCM

   1. *1: for M20A-FKS
   2. *2: for 2ZR-FAE
   3. *3: except 6 Speakers
   4. *4: w/ Navigation System
   5. *5: for M20A-FKS and CVT
2. Measure the voltage according to the value(s) in the table below.
   NOTE:

   Make sure to perform this inspection with the wheels stopped.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I4-36 (+S) - Body ground	Ignition switch ON	4.5 to 14 V

3. Repeat steps (a) and (b) for each connected ECU.

   HINT: 

   If the voltage changed to the specified voltage after disconnecting a connector, an internal short in the disconnected ECU is suspected.

   Result

   Result	Proceed to
   After performing the inspection procedure for all connectors, the voltage did not change to the specified voltage	A
   When disconnecting the connector of the ECM, the voltage changed to the specified voltage	B
   When disconnecting the connector of the stereo component amplifier assembly, the voltage changed to the specified voltage (except 6 Speakers)	C
   When disconnecting the connector of the radio and display receiver assembly, the voltage changed to the specified voltage	D
   When disconnecting the connector of the navigation ECU, the voltage changed to the specified voltage (w/ Navigation System)	E
   When disconnecting the connector of the TCM, the voltage changed to the specified voltage (for M20A-FKS and CVT)	F

Result: 

B 

REPLACE ECM 

for M20A-FKS: Refer to REMOVAL [09/2022 - 11/2022]

for 2ZR-FAE: Refer to REMOVAL [09/2022 - 11/2022]

Result: 

C 

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

D 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

E 

REPLACE NAVIGATION ECU 

Refer to REMOVAL [03/2019 - 11/2022]

Result: 

F 

REPLACE TCM 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

A 

See step  20

1. Disconnect the A47*1 or A46*2 ECM connector.
2. Disconnect the I68 stereo component amplifier assembly*3 connector.
3. Disconnect the I55 radio and display receiver assembly connector.
4. Disconnect the I69 navigation ECU*4 connector.
5. Disconnect the C80 TCM*5 connector.
6. Disconnect the I4 combination meter assembly connector.
7. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A47-42 (SPD)*1, A46-44 (SPD)*2, I68-11 (SPD)*3, I55-27 (SPD), I69-9 (SPD)*4 or C80-42 (SPD)*5 - I4-36 (+S)	Always	Below 1 Ω
   A47-42 (SPD)*1, A46-44 (SPD)*2, I68-11 (SPD)*3, I55-27 (SPD), I69-9 (SPD)*4, C80-42 (SPD)*5 or I4-36 (+S) - Body ground	Always	10 kΩ or higher

   1. *1: for M20A-FKS
   2. *2: for 2ZR-FAE
   3. *3: except 6 Speakers
   4. *4: w/ Navigation System
   5. *5: for M20A-FKS and CVT

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Smart Key System	A
   w/o Smart Key System with Electric Parking Brake System	B
   w/o Smart Key System and Electric Parking Brake System	C

Result: 

B 

See step  25

Result: 

C 

See step  27

Result: 

A 

See step  22

1. Check for smart key system (for start function) DTCs are output.

   Body Electrical > Power Source Control > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO SMART KEY SYSTEM (FOR START FUNCTION) 

for HV Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

for Gasoline Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

Result: 

A 

See step  23

HINT: 

This procedure is performed to check the diode inside the combination meter assembly.

1. Remove the combination meter assembly.

   Refer to REMOVAL [09/2022 - 11/2022]

2. Measure the internal resistance of the combination meter assembly.

   Standard Resistance

   Tester Connection	Tester Connection	Condition	Measured Value
   I4-6 (IG+) - I4-20 (SI)	Positive (+) tester probe → I4-6 (IG+) Negative (-) tester probe → I4-20 (SI)	Always	A
   I4-6 (IG+) - I4-20 (SI)	Positive (+) tester probe → I4-20 (SI) Negative (-) tester probe → I4-6 (IG+)	Always	B

   OK

   There is a large difference between the measured value (A) and the measured value (B).

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

OK 

See step  24

1. Disconnect the I1 certification ECU (smart key ECU assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I1-21 (SPDO) - I4-20 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A51 skid control ECU (brake actuator assembly) connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A51-34 (SP1) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

Result: 

NG 

See step  26

1. Disconnect the A51 skid control ECU (brake actuator assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A51-34 (SP1) - I4-20 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A100 skid control ECU (brake actuator assembly) connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A100-2 (SP1) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

Result: 

NG 

See step  28

1. Disconnect the A51 skid control ECU (brake actuator assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A51-34 (SP1) - I4-20 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Smart Key System	A
   w/o Smart Key System with Electric Parking Brake System	B
   w/o Smart Key System and Electric Parking Brake System	C

Result: 

B 

See step  32

Result: 

C 

See step  33

Result: 

A 

See step  30

1. Check for smart key system (for start function) DTCs are output.

   Body Electrical > Power Source Control > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO SMART KEY SYSTEM (FOR START FUNCTION) 

for HV Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

for Gasoline Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 11/2022]

Result: 

A 

See step  31

1. Disconnect the I1 certification ECU (smart key ECU assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I1-21 (SPDO) - I4-20 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A51 skid control ECU (brake actuator assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A51-34 (SP1) - I4-20 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A100 skid control ECU (brake actuator assembly) connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A100-2 (SP1) - I4-20 (SI)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

for Gasoline Model: Refer to REMOVAL [09/2022 - 11/2022]

for HV Model: Refer to REMOVAL [09/2022 - 09/2024]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR