System Check
Electrical system functions may be checked at multi-pin connector of ECU. Turn ignition off. Disconnect connector from ECU. Using either ohmmeter or voltmeter, check system between terminals as noted. See Fig 1 . See VANAGON AFC DIGIFANT SYSTEM VOLTAGE CHECKS table and VANAGON AFC DIGIFANT SYSTEM RESISTANCE CHECKS table.
CAUTION:
Connect ohmmeter leads ONLY to terminals as specified in charts to prevent electrical damage to ohmmeter when testing system.
VANAGON AFC DIGIFANT SYSTEM VOLTAGE CHECKS (1)
| Between Terminal Nos. | Components Checked | Specifications | ||
|---|---|---|---|---|
| 13 & 14 | Control unit voltage supply | Approximate battery voltage | ||
| 14 & 19 | Control unit voltage supply | Approximate battery voltage | ||
| 13 & 25 | Voltage to ignition coil terminal 1 | Approximate battery voltage | ||
| 1 & 13 | Voltage to idle stabilizer, unplug all 4 injectors | Voltage at starter terminal 50 when cranking should be minimum 8 volts. | ||
| 3 & 13 | Voltage to fuel pump relay. Connect jumper wire between terminals | Fuel pump should operate. | ||
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VANAGON AFC DIGIFANT SYSTEM RESISTANCE CHECKS (1)
| Between Terminal Nos. | Components Checked | Specifications | ||
|---|---|---|---|---|
| 12 & 14 | Injectors. Connect only one injector at a time | 15-20 ohms. | ||
| 6 & 11 | Throttle Valve Switch | Continuity when closed or fully open. | ||
| 6 & 17 | Intake Air Sensor | 500 - 1000 ohms | ||
| 17 & 21 | Intake Air Sensor | Resistance changes when moving air sensor plate | ||
| 6 & 8 | Hall Sender Wiring | Continuity should exist with Hall sender removed and all 3 connectors jumped together | ||
| 6 & 18 | Hall Sender Wiring | Continuity should exist with Hall sender removed and all 3 connectors jumped together | ||
| 2 & 13 | Oxygen Sensor Wiring | Continuity should exist with connector removed from oxygen sensor and Green wire grounded. No continuity with connector installed | ||
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