Vanagon F4-1970cc 2.0L (1982)
Intake Air Sensor Connection
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Pull off electrical connector from intake air sensor
Checking Fuel Pump Contacts In Intake Air Sensor
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Connect ohmmeter to terminals 36 and 39
Resistance should be infinite ohms
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Push air sensor flap open fully
Resistance should be 0 ohms as soon as flap is opened slightly
Reading should remain constant through out flap range
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Release air sensor flap
Meter should read infinite ohms
Note: If resistance specifications are correct but fuel pump does not work, check for break in wiring between control unit and intake air sensor
Resistance Checks
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Touch ohmmeter probes to following pairs of air sensor connections (flap closed, room temperature)
6 & 9 = 200 - 400 ohms
6 & 8 = 130 - 260 ohms
8 & 9 = 70 - 140 ohms
6 & 7 = 40 - 300 ohms
7 & 8 = 100 - 500 ohms
6 & 27 if applicable max. 2,800 ohms at 20°C (68°F)
Checking Resistance Strip In Intake Air Sensor
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Check intake air sensor plate is in closed position
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Connect ohmmeter to terminals 7 & 8 and open air sensor plate slowly.
Resistance must change smooth and evenly
Resistance should not be lower than 40 ohm and not above 500 ohms of values
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Repeat on terminals 6 & 7