4-40 FI SYSTEM DIAGNOSIS
7) Disconnect the ECM coupler.
8) Check the continuity between Red wire A and terminal A.
9) Also, check the continuity between G/B wire B and terminal
9.
IAPS lead wire continuity:
Continuity ()
09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
Tester knob indication: Continuity test ()
Is the continuity OK?
10)After repairing the trouble, clear the DTC using SDS tool.
(4-27)
Step 2
1) Connect the IAP sensor coupler and ECM coupler.
2) Insert the needle pointed probes to the lead wire coupler.
3) Start the engine at idle speed and measure the IAP sensor
output voltage at the wire side coupler (between G/B and
B/Br wires).
IAP sensor output voltage: Approx. 2.6 V at idle speed
(+ G/B – - B/Br)
09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
Tester knob indication: Voltage ()
Is the voltage OK?
4) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
YES Go to Step 1 (4-37) and go to Step 2.
NO
Red wire or G/B wire open, or G/B wire shorted to
ground
YES Go to Step 3.
NO
• Check the vacuum hose for crack or damage.
• Open or short circuit in the G/B wire
• If vacuum hose and wire are OK, replace the
IAP sensor with a new one.
1
!
ECM coupler (Harness side)
(Black)
(Gray)
2
V
SAMPLE
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