DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (Electronically Controlled Brake System (HV) - Diagnostic Codes (08 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C12F8-12: ECB Solenoid Control "A" Circuit Short to Battery; DTC C12F8-14: ECB Solenoid Control "A" Circuit Short to Ground or Open [12/2019 - 11/2023] >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different variant/trim than selected.
C12FA (CASE 1)

Monitor runs whenever the following DTCs are not stored C14C7 (Case 3 to 9): Brake system voltage circuit low
All of the following conditions are met A, B, C and D
A. Ignition switch Off
B. +BS (linear) effective invalidity Valid
C. Command to brake pressure control solenoid power supply relay On
D. Either of the following conditions is met -
Brake system voltage 1 Higher than 7.3 V
Main relay on experience Unavailable
C12FA (CASE 2)

Monitor runs whenever the following DTCs are not stored C14C7 (Case 3 to 9): Brake system voltage circuit low
All of the following conditions are met A, B, C and D
A. Ignition switch On (READY)
B. +BS (linear) effective invalidity Valid
C. Command to brake pressure control solenoid power supply relay On
D. Either of the following conditions is met a or b
a. Both of the following conditions are met -
Brake system voltage 1 Higher than 7.3 V
IG1 voltage Higher than 9.5 V
b. Main relay on experience Unavailable
C12FA (CASE 3)

Monitor runs whenever the following DTCs are not stored C14C7 (Case 3 to 9): Brake system voltage circuit low
Both of the following conditions are met -
Solenoid relay On
Brake system voltage 1 Higher than 7.3 V
C12FB (CASE 1)

Monitor runs whenever the following DTCs are not stored None
Both of the following conditions are met -
+BS (linear) effective invalidity Valid
Command to brake pressure control solenoid power supply relay Off
C12FB (CASE 2)

Monitor runs whenever the following DTCs are not stored None
Solenoid relay Off