4-58 FI SYSTEM DIAGNOSIS
7) Disconnect the ECM coupler.
8) Check the continuity between R wire A and terminal A.
9) If OK, then check the continuity between G/Y wire C and ter-
minal P.
APS 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.
(4-26)
Step 2
1) Connect the AP sensor coupler and ECM coupler.
2) Insert the needle pointed probes to the lead wire coupler.
Turn the ignition switch ON.
3) Measure the AP sensor output voltage at the wire side cou-
pler (between G/Y and B/Br wires).
AP sensor output voltage: Approx. 3.6 V at
100 kPa (760 mmHg)
(+ G/Y – - B/Br)
09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
Tester knob indication: Voltage ()
4) After repairing the trouble, clear the DTC using SDS tool.
(4-26)
YES Go to Step 1 (4-56) and go to Step 2.
NO
Red or G/Y wire open, or G/Y wire shorted to
ground
YES Go to Step 3.
NO
• Check the air passage for clogging.
• Open or short circuit in the G/Y wire
• Replace the AP sensor with a new one.
ECM couplers (Harness side)
1
]
2
V
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