WIRING DIAGRAM
DTC 31 Volume Air Flow Meter Circuit (No. 1)
CIRCUIT DESCRIPTION
The volume ar flow meter is located directly behind the air cleaner, and detects the intake air volume. It converts
the intake air readings into a voltage signal by means of a potentiometer. Intake air volume signal is used to
calculate the basic injection duration and basic ignition advance angle.
Code No. Diagnostic Trouble Code Detecting Condition Trouble Area
31
All conditions below are detected continuously for 0.5
sec. or more.
(a) Idle switch: ON (IDL)
(b) Voltage of terminal VS: 0.1 V or less
(c) Engine speed: 1,500 rpm or less
Open (VC) or short (VC–32) in volume air flow
meter circuit.
Volume air flow meter
ECM
EG–388
–ENGINE TROUBLESHOOTING CIRCUIT INSPECTION
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