4-76 FI SYSTEM DIAGNOSIS
5) If OK, then check the continuity between each terminal and
ground.
STP sensor continuity: ∞ Ω (Infinity)
09900-25008: Multi-circuit tester set
Tester knob indication: Resistance (Ω)
Are the resistance and continuity OK?
6) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
Step 2
1) Turn the ignition switch ON.
2) Measure the injector voltage between Y/R wire and ground.
Injector voltage: Battery voltage
(+ Y/R – - Ground)
NOTE:
Injector voltage can be detected only 3 for seconds after ignition
switch is turned ON.
09900-25008: Multi-circuit tester set
Tester knob indication: Voltage ()
Is the voltage OK?
3) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
YES Go to Step 2.
NO Replace the injector with a new one. (5-23)
YES
• Gr/W wire open or shorted to ground, or poor h
connection (#1 cylinder side)
• Gr/B wire open or shorted to ground, or poor g
connection (#2 cylinder side)
• Gr/Y wire open or shorted to ground, or poor f
connection (#3 cylinder side)
• Gr/R wire open or shorted to ground, or poor e
connection (#4 cylinder side)
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
NO Open circuit in the Y/R wire
1
2
V
ECM coupler (Harness side)
2
(Black) (Gray)
SAMPLE
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