Suzuki Baleno Manual page 1432

6-2-84 ENGINE GENERAL INFORMATION AND DIAGNOSIS (J18 ENGINE WITH WU TWC)
TROUBLESHOOTING (DTC P0505)
STEP
1 Was ENGINE DIAG. FLOW TABLE performed?
2 Idle Speed Check
1) Check idle speed / idle air control duty referring to "Idle
Speed/ Idle Air Control Duty Inspection" in section 6E4.
Is check result as specified?
3 Vehicle Speed Sensor Signal Check
Is vehicle speed displayed on scan tool when driving
vehicle?
4 Air Intake System Check
1) Check air intake system for clog and air inhaling.
2) Check fast idle plunger length referring to "Fast Idle
Control System Inspection" in section 6E4.
Are above check result satisfactory?
5 Idle Air Control Valve Operation Check
1) Check idle air control valve for operation referring to
"Idle Air Control Valve Operation Check" in this
section.
Is check result satisfactory?
6 Idle Air Control Valve Check
1) Check idle air control valve for resistance and
operation referring to "Idle Air Control Valve Check" in
this section.
Is check result satisfactory?
7 Check Parts or System which Can Cause Engine Low or
High Idle.
– EGR valve malfunction (leakage)
– EVAP system malfunction
– Accessary engine load
– Engine mechanical (Engine compression)
Are they in good condition?
8 Idle Air Adjusting Screw Check
1) Adjust idle speed and idle air control duty referring to
"Idle Speed / Idle Air Control Duty Adjustment" in
section 6E4.
Are specified idle speed and idle air control duty
obtained?
ACTION YES
Go to Step 2. Go to ENGINE
DIAG. FLOW
TABLE.
Go to Step 3. Go to Step 4.
Intermittent trouble. Go to Step 4 in DTC
If OK, substitute a P0500 Diag. Flow
known-good ECM Table.
and recheck.
Go to Step 5. Repair or replace.
Go to Step 7. Go to Step 6.
"R / B" or "R" circuit Clean or replace idle
open or short. air control valve.
If wire and
connections are OK,
substitute a known-
good ECM and
recheck.
Go to Step 8. Repair or replace.
Idle air adjusting Clog of idle air
screw maladjusted. passage.
If OK, substitute a
known-good ECM
and recheck.
NO