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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 135 (Electronically Controlled Brake System (HV) - Diagnostic Codes (09 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C141C-12: Brake Booster Motor "A" Control Circuit Short to Battery; DTC C141C-14: Brake Booster Motor "A" Control Circuit Short to Ground or Open; DTC C141C-1C: Brake Booster Motor "A" Control Circuit Voltage Out of Range [12/2019 - 10/2021] >> Component Operating Range

Component Operating Range

WARNING: This page is about a different variant/trim than selected.
C140F (CASE 1) AND C141E (CASE 1)

All of the following conditions are met A, B, C, D and E
A. Brake system voltage 1 Less than 16.6 V and higher than 7.3 V
B. Following conditions are met 4 seconds or more
Both of the following conditions are met -
Motor duty output order value 0%
Motor fail-safe relay monitor On
C. All of the following conditions are met at the ECU status (last IG ON timing final) -
Brake system voltage fail (C12FA, C12FB) Not detected
Brake booster motor fail (C141C, C141D, C141E, C141F) Not detected
Brake pressure control solenoid fail (C14F4, C14FD, C150A, C1510) Not detected
D. All of the following conditions are met at the ECU status (pre main) -
Brake system voltage fail (C121F, C12FA, C12FB) Not detected
Brake booster motor fail (C141C) Not detected
Brake pressure control solenoid fail (C14F3, C14F4, C14FC, C14FD, C1509, C150A, C150F, C1510) Not detected
E. High side voltage of motor Less than 3.0 V
C140F (CASE 2)

All of the following conditions are met A, B, C, D, E, F, G, H, I and J
A. Brake system voltage 1 Less than 16.6 V and higher than 7.3 V
B. MRI1 voltage 5.7 V or more
C. Motor relay input signal permission Off
D. Command to motor relay Off
E. Motor duty output order value 0%
F. Command to reverse battery protection MOS Off
G. Command to motor fail-safe relay On
H. All of the following conditions are met at the ECU status (last IG ON timing final) -
Brake system voltage fail (C12FA, C12FB) Not detected
Brake booster motor fail (C141C, C141D, C141E, C141F) Not detected
Brake pressure control solenoid fail (C14F4, C14FD, C150A, C1510) Not detected
I. All of the following conditions are met at the ECU status (pre main) -
Brake system voltage fail (C121F, C12FA, C12FB) Not detected
Brake booster motor fail (C141C) Not detected
Brake pressure control solenoid fail (C14F3, C14F4, C14FC, C14FD, C1509, C150A, C150F, C1510) Not detected
J. High side voltage of motor Less than 3.0 V
C140F (CASE 3)

All of the following conditions are met A, B, C, D, E, F, G, H, I and J
A. Brake system voltage 1 Less than 16.6 V and higher than 7.3 V
B. MRI1 voltage 5.7 V or more
C. Motor relay input signal permission Off
D. Command to motor relay Off
E. Motor duty output order value 0%
F. Command to reverse battery protection MOS On
G. Command to motor fail-safe relay Off
H. All of the following conditions are met at the ECU status (last IG ON timing final) -
Brake system voltage fail (C12FA, C12FB) Not detected
Brake booster motor fail (C141C, C141D, C141E, C141F) Not detected
Brake pressure control solenoid fail (C14F4, C14FD, C150A, C1510) Not detected
I. All of the following conditions are met at the ECU status (pre main) -
Brake system voltage fail (C121F, C12FA, C12FB) Not detected
Brake booster motor fail (C141C) Not detected
Brake pressure control solenoid fail (C14F3, C14F4, C14FC, C14FD, C1509, C150A, C150F, C1510) Not detected
J. High side voltage of motor Less than 3.0 V
C141D (CASE 1)

All of the following conditions are met A, B, C, D, E and F
A. Brake system voltage 1 Less than 16.6 V and higher than 7.3 V
B. Motor fail-safe relay output monitor On
C. Output duty order value (command to motor relay port) 100%
D. All of the following conditions are met at the ECU status (last IG ON timing final) -
Brake system voltage fail (C12FA, C12FB) Not detected
Brake booster motor fail (C141C, C141D, C141E, C141F) Not detected
Brake pressure control solenoid fail (C14F4, C14FD, C150A, C1510) Not detected
E. All of the following conditions are met at the ECU status (pre main) -
Brake system voltage fail (C121F, C12FA, C12FB) Not detected
Brake booster motor fail (C141C) Not detected
Brake pressure control solenoid fail (C14F3, C14F4, C14FC, C14FD, C1509, C150A, C150F, C1510) Not detected
F. Difference between the MRI1 voltage and high side voltage of motor 1.5 V or less
C141D (CASE 2)

All of the following conditions are met A, B, C, D, E, F, G, H, I and J
A. Brake system voltage 1 Less than 16.6 V and higher than 7.3 V
B. MRI1 voltage 5.7 V or more
C. Motor relay input signal permission On
D. Command to motor relay On
E. Motor duty output order value 100%
F. Command to reverse battery protection MOS Off
G. Command to motor fail-safe relay Off
H. All of the following conditions are met at the ECU status (last IG ON timing final) -
Brake system voltage fail (C12FA, C12FB) Not detected
Brake booster motor fail (C141C, C141D, C141E, C141F) Not detected
Brake pressure control solenoid fail (C14F4, C14FD, C150A, C1510) Not detected
I. All of the following conditions are met at the ECU status (pre main) -
Brake system voltage fail (C121F, C12FA, C12FB) Not detected
Brake booster motor fail (C141C) Not detected
Brake pressure control solenoid fail (C14F3, C14F4, C14FC, C14FD, C1509, C150A, C150F, C1510) Not detected
J. Difference between the MRI1 voltage and high side voltage of motor 1.5 V or less
C141E (CASE 2)

All of the following conditions are met A, B, C, D, E, F, G, H, I and J
A. Brake system voltage 1 Less than 16.6 V
B. MRI1 voltage 5.7 V or more
C. Motor relay input signal permission Off
D. Command to motor relay On
E. Motor duty output order value 100%
F. Command to reverse battery protection MOS Off
G. Command to motor fail-safe relay Off
H. All of the following conditions are met at the ECU status (last IG ON timing final) -
Brake system voltage fail (C12FA, C12FB) Not detected
Brake booster motor fail (C141C, C141D, C141E, C141F) Not detected
Brake pressure control solenoid fail (C14F4, C14FD, C150A, C1510) Not detected
I. All of the following conditions are met at the ECU status (pre main) -
Brake system voltage fail (C121F, C12FA, C12FB) Not detected
Brake booster motor fail (C141C) Not detected
Brake pressure control solenoid fail (C14F3, C14F4, C14FC, C14FD, C1509, C150A, C150F, C1510) Not detected
J. High side voltage of motor Less than 3.0 V
C141E (CASE 3)

All of the following conditions are met A, B, C, D, E, F, G, H, I and J
A. Brake system voltage 1 Less than 16.6 V
B. MRI1 voltage 5.7 V or more
C. Motor relay input signal permission Off
D. Command to motor relay Off
E. Motor duty output order value 0%
F. Command to reverse battery protection MOS Off
G. Command to motor fail-safe relay Off
H. All of the following conditions are met at the ECU status (last IG ON timing final) -
Brake system voltage fail (C12FA, C12FB) Not detected
Brake booster motor fail (C141C, C141D, C141E, C141F) Not detected
Brake pressure control solenoid fail (C14F4, C14FD, C150A, C1510) Not detected
I. All of the following conditions are met at the ECU status (pre main) -
Brake system voltage fail (C121F, C12FA, C12FB) Not detected
Brake booster motor fail (C141C) Not detected
Brake pressure control solenoid fail (C14F3, C14F4, C14FC, C14FD, C1509, C150A, C150F, C1510) Not detected
J. High side voltage of motor Less than 3.0 V