ELECTRICAL POWER STEERING (EPS) SYSTEM
3B1-5
SH410
SYSTEM CHECK FLOW TABLE
STEP
ACTION
YES
NO
1
1) Record details of the problem (failure, complaint) and
how it occurred as described by the customer.
For this purpose, use of such a questionnaire form as
shown below will facilitate collecting information to the
point required for proper analysis and diagnosis.
2) Check if what the customer claimed in “CUSTOMER
QUESTIONNAIRE” is actually found in the vehicle and
if that symptom is found, whether it is identified as a
failure. (This step should be shared with the customer if
possible.)
3) Check DTC referring to “DTC CHECK” in this section
and record the DTC(s).
4) Clear DTC if any malfunction DTC exists referring to
“DTC CLEARANCE” in this section, then recheck DTC.
Is any malfunction DTC detected?
Go to Step 2.
Go to Step 3.
2
1) Inspect and repair referring to applicable diagnostic
trouble code table in this section.
2) Clear DTC referring to “DTC CLEARANCE” in this sec-
tion.
Does the trouble recur?
Go to Step 5.
Go to Step 4.
3
1) Test drive the vehicle and turn steering wheel fully to
the right and left during test driving. See WARNING 1.
Check if any trouble symptom exists.
2) Inspect and repair basic parts referring to “DIAGNOSIS
CHART” in Section 3.
3) If the trouble cannot be repaired in Step 3-2), inspect
and repair referring to “TROUBLE DIAGNOSIS (FOR
TROUBLE NOT INDICATED BY ON-BOARD DIAG-
NOSTIC SYSTEM)” in this section.
Does the trouble recur?
Go to Step 5.
Go to Step 4.
4
Confirm that the problem symptom has gone and P/S sys-
tem is free from any abnormal conditions. If what has been
repaired is related to the malfunction DTC, clear the DTC
once and perform test driving as in Step 3-1) and confirm
that no DTC is indicated.
Does the trouble recur?
Go to Step 5.
END.
5
Check DTC referring to “DTC CHECK” in this section
Is any malfunction DTC detected?
Go to Step 2.
Go to Step 3.
WARNING 1:
Carry out test in very little traffic area to prevent an accident.
NOTE:
As execution of DTC CLEARANCE will clear all malfunction DTCs, be sure to record all DTCs before
servicing.
When 2 or more codes are indicated, the lowest numbered code will appear first.
If a code not listed on the table is displayed, then the P/S control module is faulty.
DTC 22 is indicated when ignition switch is ON and engine is not running but if DTC 12 is indicated when
engine is started, it means nothing abnormal.
