SELF-DIAGNOSIS FUNCTION
F-84flowchartCODE NO.08 AIRFLOW METER
1
Are there any poor connections in airflow meter circuit?
Yes
Repair or replace connector
No
2
Is Code No.10 present at same time?
Yes
Check for open circuit in wiring from airflow meter terminal-wire (B/LG) to ground
No
3
Is resistance of airflow meter OK? Airflow meter D(LG/R)–F(G/Y): fully closed 200–600 Ω, fully open 20–1,000 Ω; D(LG/R)–C(B/LG): fully open 200–400 Ω
No
Replace airflow meter (Refer to page F-135)
Yes
4
Is there continuity between airflow meter connector and ECU? Airflow meter D(LG/R)–ECU 2K; F(G/Y)–ECU 2O
No
Check for open circuit in wiring from airflow meter to ECU
Yes
5
Are ECU terminals 2D and 2K voltages OK? (Refer to page F-129)
No
Check for short circuit in wiring from airflow meter to ECU
Yes
6
Replace ECU (Refer to page F-127)
Circuit Diagram
CODE NO.08 AIRFLOW METER Circuit Diagram
Components (6)
ECUWater thermosensorAirflow meterDiagnosis connectorCircuit-opening relayground
Connections (9)
ECU
ECU:2OWater thermosensorBlue with White stripe (INJ)
ECU:2PAirflow meter:GGray (F)
ECU:2DAirflow meter:CRed with Green stripe (F)
ECU:2QAirflow meter:FGreen with Yellow stripe (F)
ECU:2KAirflow meter:DLight Green with Red stripe (F)
Water thermosensor
Water thermosensorAirflow meter:EBlack with Light Green stripe (INJ/F)
Circuit-opening relay
Circuit-opening relayDiagnosis connectorLight Green (F)
Diagnosis connector
Diagnosis connectorAirflow meter:ALight Green (F)
Airflow meter
Airflow meter:BgroundBlack (F)