Suzuki Intruder VZR1800, Service Manual

Page: 229 / 586

FI SYSTEM DIAGNOSIS 5-35
4) Disconnect the IAP sensor coupler.
5) Turn the ignition switch ON.
6) Measure the voltage at the Red wire
3
and ground.
7) If OK, then measure the voltage at the Red wire
3
and B/Br
wire
4
.
$
IAP sensor input voltage: 4.5 – 5.5 V
(
+
Red –
-
Ground)
(
+
Red –
-
B/Br)
!
09900-25008: Multi-circuit tester set
&
Tester knob indication: Voltage (
'
)
Is the voltage OK?
8) After repairing the trouble, clear the DTC using SDS tool.
(
#
5-26)
Step 2
1) Connect the IAP sensor coupler.
2) Reinstall the fuel tank and lift up fuel tank.
3) Insert the needle pointed probes to the lead wire coupler.
4) Start the engine at idle speed and measure the IAP sensor
output voltage at the wire side coupler.
(#2: between P/B and B/Br wires)
(#1: between G/B and B/Br wires)
$
IAP sensor output voltage:
Approx. 2.6 V at idle speed
(#2:
+
P/B –
-
B/Br)
(#1:
+
G/B –
-
B/Br)
!
09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
&
Tester knob indication: Voltage (
'
)
Is the voltage OK?
5) After repairing the trouble, clear the DTC using SDS tool.
(
#
5-26)
YES Go to Step 2.
NO
• Loose or poor contacts on the ECM coupler
(terminal
A
or
S
).
• Open or short circuit in the Red wire or B/Br
wire.
YES Go to Step 3.
NO
• Check the vacuum hose for crack or damage.
• Open or short circuit in the P/B wire. (#2)
• Open or short circuit in the G/B wire. (#1)
• If vacuum hose and wire are OK, replace the
IAP sensor with a new one.
V
1
2
V