DESCRIPTION
Detection Item | Symptom | Trouble Area |
---|---|---|
Power Steering ECU Communication Stop Mode | Any of the following conditions are met:
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Note
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.
Inspect the fuses for circuits related to this system before performing the following procedure.
Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
Some parts must be initialized and set when replacing or removing and installing parts.
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Tech Tips
Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
CHECK FOR OPEN IN CAN BUS WIRE (RACK AND PINION POWER STEERING GEAR ASSEMBLY BRANCH WIRE)
Disconnect the cable from the negative (-) battery terminal.
Disconnect the B1 rack and pinion power steering gear assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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Result | ||||||||
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B |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Click here |
C |
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR |
A |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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Reconnect the cable to the negative (-) battery terminal.
Note
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||||
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Result | ||||||||
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|
A |
REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY for 2WD: Click here |
B |
GO TO STOP AND START SYSTEM for 8GR-FKS: Click here |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Reconnect the cable to the negative (-) battery terminal.
Note
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||||
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|
Result | |||
---|---|---|---|
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OK |
REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY for 2WD: Click here |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |