RM38T0EC _55 Steering _112287 POWER ASSIST SYSTEMS _0510880 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.

·

*: Use the GTS.



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.


Result:
Proceed to
NEXT



NEXT

4.PROBLEM SYMPTOM CONFIRMATION
4.PROBLEM SYMPTOM CONFIRMATION
Result:
Result Proceed to
Symptom does not occur. A
Symptom occurs. B



A

5.SYMPTOM SIMULATION

B

6.CHECK CAN COMMUNICATION SYSTEM*
5.SYMPTOM SIMULATION
Result:
Proceed to
NEXT



NEXT

6.CHECK CAN COMMUNICATION SYSTEM*
6.CHECK CAN COMMUNICATION SYSTEM*
a.

Check for DTCs.

·

for HEV Model:

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for HEV Model)>DIAGNOSIS SYSTEM

·

for Gasoline Model:

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model)>DIAGNOSIS SYSTEM



Result:
Result Proceed to
CAN communication system DTCs are not output. A
CAN communication system DTCs are output. B


HINT:
·

If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.

·

If communication to the power steering ECU assembly cannot be established through the GTS, inspect terminals CANH and CANL of the DLC3 and the power steering ECU assembly, and the IG circuit of the power steering ECU assembly.




A

7.CHECK FOR DTC*

B

PROCEED TO CAN COMMUNICATION SYSTEM
·

for HEV Model:

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for HEV Model)>HOW TO PROCEED WITH TROUBLESHOOTING

·

for Gasoline Model:

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING



7.CHECK FOR DTC*
a.

Check for DTCs.

Chassis > EMPS > Trouble Codes
50001 405
HINT:

Refer to Diagnostic Trouble Code Chart when any DTCs are output.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DIAGNOSTIC TROUBLE CODE CHART



Result:
Result Proceed to
DTCs are not output. A
DTCs are output. B



A

8.PROBLEM SYMPTOMS TABLE

B

10.REPAIR OR REPLACE
8.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

9.OVERALL ANALYSIS AND TROUBLESHOOTING*

B

10.REPAIR OR REPLACE
9.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

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



NEXT

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



NEXT

END