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Home >> Lexus >> 2012 >> IS 250 RWD V6-2.5L (4GR-FSE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Component Tests and General Diagnostics >> Power Steering ECU Communication Stop Mode
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Power Steering ECU Communication Stop Mode





CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Power Steering ECU Communication Stop Mode
- Power Steering ECU Communication Stop Mode

DESCRIPTION





HINT
"EPS" refers to the circuit that includes the power steering ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output How to Proceed With Troubleshooting.
* After performing repairs, perform the procedure listed in DTC Reproduction Method and confirm that the DTCs are not output again.
* DTC Reproduction Method: Drive the vehicle at a speed of 20 km/h (12 mph) or more for at least 5 seconds.
* After the repair, perform CAN Bus Check and check that all the ECUs and sensors connected to the CAN communication system are displayed Diagnosis System.

PROCEDURE

1. CHECK OPEN IN CAN BUS LINE (POWER STEERING ECU BRANCH LINE)

(a) Turn the engine switch off.

(b) Disconnect the power steering ECU connector.

(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





NG -- REPAIR OR REPLACE POWER STEERING ECU BRANCH LINE OR CONNECTOR (CANH, CANL)
OK -- Continue to next step.

2. CHECK WIRE HARNESS (IG, PGND)

(a) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER STEERING ECU
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