Suzuki Ignis Service Manual page 3351

6-150 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Step
6 Idle Air Control Valve Circuit Check
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Measure resistance between "RED/WHT"
wire terminal of idle air control valve con-
nector and "C64-10" wire terminal of ECM
connector, "RED/ORN" wire terminal of idle
air control valve connector and "C64-9" wire
terminal of ECM connector, "RED/YEL" wire
terminal of idle air control valve connector
and "C64-8" wire terminal of ECM connec-
tor, "RED/BLK" wire terminal of idle air con-
trol valve connector and "C64-28" wire
terminal of ECM connector.
Are resistance 1 Ω or less?
7 Idle Air Control Valve Circuit Check
1) Measure resistance between each "C64-
10", "C64-9", "C64-8" and "C64-28" wire ter-
minals of ECM connector and vehicle body
ground.
Is each resistance infinite?
8 Idle Air Control Valve Circuit Check
1) Connect connectors to ECM.
2) Turn ON ignition switch, measure voltage
between each "C64-10", "C64-9", "C64-8"
and "C64-28" wire terminals of ECM con-
nector and vehicle body ground.
Is each voltage 0 V?
9 ECM Voltage Check
1) Connect connector to idle air control valve
with ignition switch turned OFF.
2) Turn ON ignition switch, measure voltage
between each "C64-10", "C64-9", "C64-8"
and "C64-28" wire terminals of ECM con-
nector and vehicle body ground.
• "C64-8" and "C64-10" wire terminals:
0 – 1 V
• "C64-9" and "C64-28" wire terminals:
10 – 14 V
Are check results satisfactory?
10 Make sure if the following conditions are satis-
fied.
• The throttle valve is fully closed.
• The air cleaner element is installed prop-
erly.
Is it in good condition?
Action Yes
Go to Step 7.
Go to Step 8.
Go to Step 9.
Go to Step 10.
Replace idle air control
valve.
No
"RED/WHT", "RED/ORN",
"RED/YEL" or "RED/BLK"
wire in open or high resis-
tance circuit.
"RED/WHT", "RED/ORN",
"RED/YEL" or "RED/BLK"
wire in shorted to ground
circuit.
"RED/WHT", "RED/ORN",
"RED/YEL" or "RED/BLK"
wire in shorted to power
circuit.
Substitute a known-good
ECM and recheck.
Repair or replace.