LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2008 >> ES 350 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System & Component Testing, Removal, Inspection & Installation >> Active Control Engine Mount System >> DTC P16A4 High Speed CAN Communication Bus >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P16A4 High Speed CAN Communication Bus: Description

ECM skid control ECU and A/C amplifier intercommunicates with the active control engine mount ECU through the Controller Area Network (CAN). If there is a problem in this intercommunication, the active control engine mount ECU sets a DTC.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
P16A4 Communication between the ECM and E-ACM ECU is interrupted.
  • ECM
  • Active control engine mount ECU
  • Skid control ECU
  • A/C amplifier CAN communication system
Signals indicating ambient temperature of less than -40°C (-40°F) or more than 50°C (122°F) are received for 10.6 seconds or more.
Signals indicating coolant temperature of less than -40°C (-40°F) or more than 140°C (284°F) are received for 1.25 seconds or more.
Signals indicating that more than one shift position are ON or all shift positions are OFF for 30 seconds or more.