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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-49: Brake Booster Motor "A" Control Internal Electronic Failure [10/2021 - ] >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different variant/trim than selected.
C141C (CASE 1)

Monitor runs whenever the following DTCs are not stored C14C7 (Case 3 to 9): Brake system voltage circuit low
C14C8: Brake system voltage circuit high
All of the following conditions are met -
Brake system voltage 1 Less than 23.2 V and higher than 7.3 V
Output duty order value (command to motor relay port) 100%
History of motor power supply voltage drop Off
C141C (CASE 2)

Monitor runs whenever the following DTCs are not stored None
C141C (CASE 3)

Monitor runs whenever the following DTCs are not stored C14C7 (Case 3 to 9): Brake system voltage circuit low
C14C8: Brake system voltage circuit high
Both of the following conditions are met -
Brake system voltage 1 Less than 23.2 V and higher than 7.3 V
Command to reverse battery protection MOS On
C141C (CASE 4)

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
Brake system voltage 1 Less than 23.2 V and higher than 7.3 V
Motor circuit current Less than 264.00 A
Freewheeling MOS over current signal Off
Output duty order value (command to motor relay port) 100%
C141C (CASE 5 AND 9)

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
Brake system voltage 1 Less than 23.2 V and higher than 7.3 V
MRI1 voltage 5.7 V or more
Motor relay input signal permission Off
Command to motor relay Off
Motor duty output order value 0%
Command to reverse battery protection MOS Off
Command to motor fail-safe relay Off
C141C (CASE 6)

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
+BI1 voltage Higher than 9.0 V
Brake system voltage 1 Less than 23.2 V and higher than 7.3 V
MRI1 voltage 5.7 V or more
Motor relay input signal permission On
Command to motor relay Off
Motor duty output order value 0%
Command to reverse battery protection MOS Off
Command to motor fail-safe relay Off
C141C (CASE 7)

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
Brake system voltage 1 Less than 23.2 V and higher than 7.3 V
MRI1 voltage 5.7 V or more
Motor relay input signal permission On
Command to motor relay On
Motor duty output order value 100%
Command to reverse battery protection MOS Off
Command to motor fail-safe relay Off
C141C (CASE 8)

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
Brake system voltage 1 Less than 23.2 V and higher than 7.3 V
MRI1 voltage 5.7 V or more
Motor relay input signal permission Off
Command to motor relay Off
Motor duty output order value 0%
Command to reverse battery protection MOS On
Command to motor fail-safe relay Off
C141C (CASE 10)

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
Brake system voltage 1 Less than 23.2 V
MRI1 voltage 5.7 V or more
Motor relay input signal permission On
Command to motor relay On
Motor duty output order value 100%
Command to reverse battery protection MOS Off
Command to motor fail-safe relay Off
ASIC output permission Off