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Home >> Subaru >> 2018 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (3 Of 3) >> EFI System (FA20) >> DTC U0073: Control Module Communication Bus "A" Off; DTC U0101: Lost Communication With TCM; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0402: Invalid Data Received From TCM; DTC U0416: Invalid Data Received From Vehicle Dynamics Control Module; DTC U0423: Invalid Data Received From Instrument Panel Cluster Control; Module >> Circuit description >> Monitor Description
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Monitor Description

The ECM, the TCM, the skid control ECM, and the combination meter ASSY send and receive data via CAN communication line. If any malfunction occurs in this communication, the ECM stores DTC.

Monitor strategy

MONITOR STRATEGY

Related DTCs U0073: Control Module Communication Bus Off
U0101: Lost Communication with TCM
U0122: Lost Communication with Vehicle Stability Control Module
U0155: Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)
U0402: Invalid Data Received from TCM
U0416: Invalid Data Received from Vehicle Stability Control Module
U0423: Invalid Data Received from Instrument Panel Cluster Control Module
Required Sensors/Components (Main) ECM
Required Sensors/Components (Related) TCM, skid control ECM, combination meter ASSY
Frequency of Operation Continuous
Duration 0.436 seconds: U0073
0.5 seconds: U0101, U0122, U0155
2 seconds: U0402, U0416, U0423
MIL Operation Immediately after
Sequence of Operation None