FI SYSTEM DIAGNOSIS 4-45
“C49” PAIR CONTROL SOLENOID VALVE CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Remove the fuel tank. ("5-7)
2) Turn the ignition switch OFF.
3) Check the PAIR control solenoid valve coupler for loose or
poor contacts.
If OK, then measure the PAIR control solenoid valve resis-
tance.
4) Remove the air cleaner box. ("5-15)
5) Disconnect the PAIR control solenoid valve coupler and mea-
sure the resistance between terminals.
% PAIR control solenoid valve resistance:
20 – 24 Ω at 20 °C/68 °F
! 09900-25008: Multi circuit tester set
& Tester knob indication: Resistance (Ω)
Is the resistance OK?
DETECTED CONDITION POSSIBLE CAUSE
PAIR control solenoid valve voltage is not input in
ECM.
• PAIR control solenoid valve circuit open or short.
• PAIR control solenoid valve malfunction.
• ECM malfunction.
1
YES Go to Step 2
NO
• Loose or poor contacts on the ECM coupler.
• Replace the PAIR control solenoid valve with a
new one.
1
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