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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Electronically Controlled Brake System (HV) - Diagnostic Codes (06 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C121F-49: Lost Communication with Electronic Brake Booster Control Module "A" Internal Electronic Failure; DTC C14F1-12: Brake Pressure Control Solenoid "C" Control Circuit Short to Battery; DTC C14F1-14: Brake Pressure Control Solenoid "C" Control Circuit Short to Ground or Open; DTC C14F1-18: Brake Pressure Control Solenoid "C" Control Circuit Current Below Threshold; DTC C14F1-19: Brake Pressure Control Solenoid "C" Control Circuit Current Above Threshold; DTC C14F1-1D: Brake Pressure Control Solenoid "C" Control Circuit Current Out of Range; DTC C14FA-12: Brake Pressure Control Solenoid "D" Control Circuit Short to Battery; DTC C14FA-14: Brake Pressure Control Solenoid "D" Control Circuit Short to Ground or Open; DTC C14FA-18: Brake Pressure Control Solenoid "D" Control Circuit Current Below Threshold; DTC C14FA-19: Brake Pressure Control Solenoid "D" Control Circuit Current Above Threshold; DTC C14FA-1D: Brake Pressure Control Solenoid "D" Control Circuit Current Out of Range; DTC C1507-12: Brake Pressure Control solenoid "E" Control Circuit Short to Battery; DTC C1507-14: Brake Pressure Control solenoid "E" Control Circuit Short to Ground or Open; DTC C1507-18: Brake Pressure Control solenoid "E" Control Circuit Current Below Threshold; DTC C1507-19: Brake Pressure Control solenoid "E" Control Circuit Current Above Threshold; DTC C1507-1D: Brake Pressure Control solenoid "E" Control Circuit Current Out of Range; DTC C150D-12: Brake Pressure Control solenoid "F" Control Circuit Short to Battery; DTC C150D-14: Brake Pressure Control solenoid "F" Control Circuit Short to Ground or Open; DTC C150D-18: Brake Pressure Control solenoid "F" Control Circuit Current Below Threshold; DTC C150D-19: Brake Pressure Control solenoid "F" Control Circuit Current Above Threshold; DTC C150D-1D: Brake Pressure Control solenoid "F" Control Circuit Current Out of Range [10/2021 - ] >> Component Operating Range

Component Operating Range

WARNING: This page is about a different variant/trim than selected.
C121F (CASE 1)

All of the following conditions are met A, B, C and D
A. Brake system voltage 1 Higher than 7.3 V and less than 23.2 V
B. 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
C. 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
D. Booster circuit low voltage detection signal Off
C121F (CASE 2)

All of the following conditions are met A, B, C and D
A. Brake system voltage 1 Higher than 7.3 V and less than 23.2 V
B. 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
B. 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
C. Booster circuit low voltage detection signal Off
C14F3 (CASE 1 TO 6), C14F4 (EXCEPT CASE 2), C14FC (CASE 1 TO 6), C14FD (EXCEPT CASE 2), C1509 (CASE 1 TO 6), C150A (EXCEPT CASE 2), C150F (CASE 1 TO 6) AND C1510 (EXCEPT CASE 2)

Both of the following conditions are met A and B
A. 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
B. 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
C14F4 (CASE 2), C14FD (CASE 2), C150A (CASE 2) AND C1510 (CASE 2)

All of the following conditions are met A, B, C and D
A. Brake system voltage 1 Higher than 7.3 V
B. Solenoid current output order value 0.70 mA
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