RM36D0EC _55 Steering _083083 POWER ASSIST SYSTEMS _0403821 POWER STEERING SYSTEM Y

POWER ASSIST SYSTEMS  POWER STEERING SYSTEM  HOW TO PROCEED WITH TROUBLESHOOTING  


CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the power steering system.


PROCEDURE

1.VEHICLE BROUGHT TO WORKSHOP
Result:
Proceed to
NEXT



NEXT

2.INSPECT AUXILIARY BATTERY
2.INSPECT AUXILIARY BATTERY
a.

Turn the ignition switch off.


b.

Measure the voltage of the auxiliary battery.

Standard voltage:

11 to 14 V


HINT:

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.



Result:
Proceed to
NEXT



NEXT

3.CHECK DTC AND FREEZE FRAME DATA*
3.CHECK DTC AND FREEZE FRAME DATA*
a.

Check DTCs and freeze frame data.

i.

Check and record DTCs.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DTC CHECK / CLEAR

Chassis > EMPS > Trouble Codes
50001 405

ii.

Check and record freeze frame data.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>FREEZE FRAME DATA



b.

Clear the DTCs and freeze frame data.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DTC CHECK / CLEAR

Chassis > EMPS > Clear DTCs
50002 405

c.

Recheck for DTCs.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DTC CHECK / CLEAR

Chassis > EMPS > Trouble Codes
50001 405
i.

Reproduce the problem symptoms based on the recorded DTCs and freeze frame data, and then check if the DTCs are output again.

HINT:
·

When DTCs indicating a CAN communication system malfunction are output, first troubleshoot and repair the CAN communication system.

·

If the GTS cannot communicate with the rack and pinion power steering gear assembly, check CAN communication between the DLC3 and the rack and pinion power steering gear assembly, and also check the IG circuit of the rack and pinion power steering gear assembly.





d.

Check the vehicle control history.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>VEHICLE CONTROL HISTORY


Result:
Result Proceed to
DTC is not output but problem symptoms can be reproduced and confirmed A
DTC is output B
DTC is not output and problem symptoms cannot be reproduced and confirmed C
DTC is not output and vehicle control history is output D



A

4.PROBLEM SYMPTOMS TABLE

B

REFER TO DIAGNOSTIC TROUBLE CODE CHART, PERFORM TROUBLESHOOTING ACCORDING TO PROCEDURE FOR EACH DTC AND GO TO STEP 7

C

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


D

PERFORM TROUBLESHOOTING AND REPAIRS RELATED TO VEHICLE CONTROL HISTORY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>VEHICLE CONTROL HISTORY

NOTICE:

After performing troubleshooting and repairs related to the vehicle control history, clear the vehicle control history.



4.PROBLEM SYMPTOMS TABLE
a.

Refer to Problem Symptoms Table.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>PROBLEM SYMPTOMS TABLE


Result:
Result Proceed to
Fault is not listed in Problem Symptoms Table. A
Fault is listed in Problem Symptoms Table. B



A

5.OVERALL ANALYSIS AND TROUBLESHOOTING*

B

PERFORM TROUBLESHOOTING ACCORDING TO PROCEDURE FOR EACH CORRESPONDING SYMPTOM AND GO TO STEP 7

5.OVERALL ANALYSIS AND TROUBLESHOOTING*
a.

Refer to Terminals of ECU.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>TERMINALS OF ECU


b.

Refer to Data List / Active Test.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DATA LIST / ACTIVE TEST


Result:
Proceed to
NEXT



NEXT

6.REPAIR OR REPLACE
6.REPAIR OR REPLACE
Result:
Proceed to
NEXT



NEXT

7.CONFIRMATION TEST
7.CONFIRMATION TEST
Result:
Proceed to
NEXT



NEXT

END