ON BOARD DIAGNOSTIC SYSTEM — Troubleshooting Code No. 08 (Volume Air Flow Sensor)
F2-80flowchartCODE No. 08 (VOLUME AIR FLOW SENSOR)
1
STEP 1: Does volume air flow sensor circuit have a poor connection?
Yes
Repair or replace connector
No
2
STEP 2: Is Code No. 10 also present?
Yes
Check for open circuit in wiring from volume air flow sensor terminal C to ground
No
3
STEP 3: Is resistance of volume air flow sensor OK? (See resistance table)
No
Replace volume air flow sensor
Yes
4
STEP 4: Does wire harness between volume air flow sensor and ECM have continuity? (See continuity table)
No
Repair or replace wire harness
Yes
5
STEP 5: Are ECM terminal 3D, 2I, and 2B voltages OK? (Refer to page F2-141)
No
Check for a short circuit in wiring from volume air flow sensor to ECM
Yes
6
Replace ECM (Refer to page F2-140)
STEP 3 — Volume air flow sensor resistance
B-A
Closed throttle position (ohm)200-1000
Wide open throttle (ohm)20-800
B-D
Closed throttle position (ohm)200-400
Wide open throttle (ohm)200-400
STEP 4 — Volume air flow sensor to ECM continuity
B
ECM2I
A
ECM2B
Circuit Diagram
Volume Air Flow Sensor Circuit
Components (2)
ECMVolume Air Flow Sensor
Connections (4)
ECM
ECM:2IVolume Air Flow Sensor:B??
ECM:2BVolume Air Flow Sensor:A??
ECM:3DVolume Air Flow Sensor:D??
ECM:2KVolume Air Flow Sensor:C??