LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2024 >> GX 550 Overtrail+ >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Brake Control / Dynamic Control Systems DTCS >> Trailer Brake Control System
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Trailer Brake Control System

TRAILER BRAKE CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Code Description
C1020-16 IGR Circuit Circuit Voltage Below Threshold
C1020-17 IGR Circuit Circuit Voltage Above Threshold
C105F-62 IGR Voltage / Actuator Supply Voltage Signal Compare Failure
C1150-12 Trailer Brake Manual Slider Position Sensor Circuit Circuit Short to Battery
C1150-14 Trailer Brake Manual Slider Position Sensor Circuit Circuit Short to Ground or Open
C1150-28 Trailer Brake Manual Slider Position Sensor Circuit Signal Bias Level Out of Range / Zero Adjustment Failure
C1150-62 Trailer Brake Manual Slider Position Sensor Circuit Signal Compare Failure
C1154-9E Trailer Brake Gain (+) Switch Stuck On
C1155-9E Trailer Brake Gain (-) Switch Stuck On
C1156-04 MCU System Internal Failure
C1157-13 Trailer Detection Circuit Circuit Open
C1158-72 Power Relay Actuator Stuck Open
C1158-73 Power Relay Actuator Stuck Closed
C115A-11 Output Circuit Short to GND Circuit Short to Ground
C115A-15 Output Circuit Short to Battery Circuit Short to Battery or Open
C115A-49 Pre-Driver Internal Electronic Failure
C115E-00 Functional Safety Failure (Predetermined Maximum Output Exceeded)
C115E-19 Output Circuit Over Current Circuit Current Above Threshold
C115E-94 Functional Safety Failure (Unintended Braking) Unexpected Operation
U0076-88 Control Module Communication Bus "D" Off Bus Off
U0078-88 Control Module Communication Bus "F" Off Bus Off
U0129-87 Lost Communication with Brake System Control Module "A" Missing Message
U0155-87 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message
U1171-87 Lost Communication with Brake System Control Module (ch3) Missing Message