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HOMESERVICE MANUALSLEXUS2010RX 450H 3.5 BREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTPARK ASSIST / MONITORING (DIAGNOSTICS - INTRODUCTION)PARKING ASSIST MONITOR SYSTEMDIAGNOSTIC TROUBLE CODE CHART (TO 08/2009)DIAGNOSTIC TROUBLE CODE CHART
2010 Lexus RX 450h 3.5 B

Diagnostic Trouble Code Chart

2010 Lexus RX 450h 3.5 BSECTION Diagnostic Trouble Code Chart

HINT: 

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See " in the DTC chart. Inspect fuses and relays before investigating the trouble areas shown in the table below.

PARKING ASSIST MONITOR SYSTEM

DTC Code Detection Item Trouble Area See
C1611 ECU Malfunction 1. Parking assist ECU initialization (not initialized parking assist ECU)
2. Back camera position setting (initialized parking assist ECU)
3. Side camera position setting (initialized parking assist ECU)
4. Steering Angle setting (initialized parking assist ECU)
5. Parking assist ECU		 Refer to DTC C1611: ECU Malfunction
C1612 IG Voltage is Low or High 1. Harness or connector
2. Parking assist ECU		 Refer to DTC C1612: IG Voltage is Low or High
C1613 ACC Voltage is Low or High 1. Harness or connector
2. Parking assist ECU		 Refer to DTC C1613: ACC Voltage is Low or High
C1621 Back Camera Power Supply Failure 1. Harness or connector
2. Rear television camera assembly
3. Parking assist ECU		 Refer to DTC C1621: Back Camera Power Supply Failure; DTC C1622: Open or Short Circuit in Back Camera Signal
C1622 Open or Short Circuit in Back Camera Signal 1. Harness or connector
2. Rear television camera assembly
3. Parking assist ECU		 Refer to DTC C1621: Back Camera Power Supply Failure; DTC C1622: Open or Short Circuit in Back Camera Signal
C1625 Open or Short in Steering Angle Sensor +B 1. Harness or connector
2. Steering sensor (spiral with sensor cable sub-assembly)		 Refer to DTC C1625: Open or Short in Steering Angle Sensor +B
C1626 Steering Angle Sensor Failure 1. Steering sensor (spiral with sensor cable sub-assembly)
2. Parking assist ECU		 Refer to DTC C1626: Steering Angle Sensor Failure
C168B AVC-LAN Communication Malfunction AVC-LAN communication Refer to DTC C168B: AVC-LAN Communication Malfunction; DTC C168C: AVC-LAN Command Time Out
C168C AVC-LAN Command Time Out AVC-LAN communication Refer to DTC C168B: AVC-LAN Communication Malfunction; DTC C168C: AVC-LAN Command Time Out
C168D Vehicle Information Unmatched 1. Back camera position setting
2. Steering angle setting
3. Side camera position setting
4. Parking assist ECU		 Refer to DTC C168D: Vehicle Information Unmatched
U0073 Control Module Communication Bus Off CAN communication system Refer to DTC U0073: Control Module Communication Bus Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Main Body ECU; DTC U0293: Lost Communication with HV ECU
U0126 Lost Communication with Steering Angle Sensor Module CAN communication system Refer to DTC U0073: Control Module Communication Bus Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Main Body ECU; DTC U0293: Lost Communication with HV ECU
U0129 Lost Communication with Brake System Control Module CAN communication system Refer to DTC U0073: Control Module Communication Bus Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Main Body ECU; DTC U0293: Lost Communication with HV ECU
U0140 Lost Communication with Main Body ECU CAN communication system Refer to DTC U0073: Control Module Communication Bus Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Main Body ECU; DTC U0293: Lost Communication with HV ECU
U0293 Lost Communication with HV ECU CAN communication system Refer to DTC U0073: Control Module Communication Bus Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Main Body ECU; DTC U0293: Lost Communication with HV ECU
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.