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DTC C1437: Lost Communication with ECM: Description

WARNING: This page is about a different car, the 2009 Lexus IS 350 and 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

The skid control ECU receives signals from the ECM via the CAN communication system.

DTC Code DTC Detection Condition Trouble Area
C1437 When the IG1 terminal voltage is 10 V or more and the vehicle speed is 15 km/h (9 mph) or more, data cannot be sent to the ECM for 2 seconds or more.
  • CAN communication system (Skid control ECU to ECM)
  • Brake actuator assembly (Skid control ECU)
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