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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 C137B-A2: Brake System Control Module "A" System Voltage System Voltage Low [11/2023 - ] >> Component Operating Range

Component Operating Range

WARNING: This page is about a different variant/trim than selected.
C137C (CASE 1)

Both of the following conditions are met -
IGR voltage Higher than 10 V
IGP voltage Higher than 10 V
C137C (CASE 2, 6 AND 7)

+BS voltage 9.5 V or more
C137C (CASE 3)

All of the following conditions are met A, B and C
A. +BS voltage 8.5 V or more
B. Either of the following conditions is met a or b
a. Ready state Off
b. Both of the following conditions are met -
Ready state On
IGR voltage Higher than 10 V
C. Master cylinder pressure sensor data validity Valid
C137C (CASE 4)

All of the following conditions are met A, B and C
A. +BS voltage 8.5 V or more
B. Either of the following conditions is met a or b
a. Ready state Off
b. Both of the following conditions are met -
Ready state On
IGR voltage Higher than 10 V
C. Stroke sensor data validity Valid
C137C (CASE 5)

All of the following conditions are met A, B and C
A. +BS voltage 8.5 V or more
B. Either of the following conditions is met a or b
a. Ready state Off
b. Both of the following conditions are met -
Ready state On
IGR voltage Higher than 10 V
C. Wheel cylinder pressure sensor data validity Valid