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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 110 (Stop And Start System - Diagnostic Codes) >> Stop And Start System >> DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication With Brake System Control Module(ch2) Missing Message [10/2022 - ] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
Related DTCs U0100: Lost communication with engine control module (starter / generator control module) verify communication
U0103: Lost communication with gear shift control module (starter / generator control module) verify communication
U0129: Lost communication with brake system control module (starter / generator control module) verify communication
U115C: Lost communication with engine control module (starter / generator control module, chassis local bus) verify communication
Required Sensors/Components (Main) Engine stop and start ECU
Required Sensors/Components (Related) -
Frequency of Operation Continuous
Frequency of Operation 1 seconds: U0100
3 seconds: U0103
2.22 seconds: U0129
10.6 seconds: U115C
Duration 2 driving cycles: U0100, U0103, U0129
Immediate: U115C
Sequence of Operation None