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Home >> Lexus >> 2009 >> IS F V8-5.0L (2UR-GSE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Component Tests and General Diagnostics >> ECM Communication Stop Mode
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ECM Communication Stop Mode








NETWORKING: CAN COMMUNICATION SYSTEM: ECM Communication Stop Mode

ECM Communication Stop Mode

DESCRIPTION





HINT: "Engine" and "ECT" refer to the circuit that includes the ECM.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE:
- Turn the engine switch off before measuring the resistance of CAN bus main wires and CAN bus branch wires.
- After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
- Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other switches, or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
HINT: Operating the engine switch, any switches, or any doors triggers related ECU and sensor communication with the CAN. This communication will cause the resistance value to change.

PROCEDURE

1. CHECK WIRE HARNESS (+B, +B2, E1)
(a) Turn the engine switch off.
(b) Disconnect the ECM connectors (E6) and (A6).
(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
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