Fuel Pump Ecu Circuit
Turn ignition off. Disconnect electrical connector from fuel pump ECU. See COMPONENT LOCATIONS under INTRODUCTION. Check for continuity between chassis ground and terminals "E" and DI of fuel pump ECU connector. See Fig 1. Measure voltage between chassis ground and specified terminals of fuel pump ECU connector. See FUEL PUMP ECU CIRCUIT VOLTAGE table. If continuity and voltage are not as specified, replace fuel pump ECU.
FUEL PUMP ECU CIRCUIT VOLTAGE
| Terminal & Condition | Volts | |||
|---|---|---|---|---|
| FP | ||||
| Sudden Racing | 12.0-14.0 | |||
| Idling | 8.0-10.0 | |||
| +B (Ignition On) | 10.0-14.0 | |||
| FPC | ||||
| Sudden Racing (1) | 4.0-6.0 | |||
| Idling | 2.5 | |||
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