NS2 - Fuel System Check
- Relieve fuel system pressure. Install pressure gauge to fitting on fuel rail. Crank engine for at least 7 seconds. Fuel pressure should be at least 40 psi. If pressure is okay, go to step 2). If fuel pressure is less than 40 psi, go to NS5 .
- Connect Diagnostic Readout Box II (C-4805) to engine harness connector. Put system into Sensor Test Mode "05". If display reads .5-1.5 volt, go to step 3) If reading is greater than 1.5 volts, replace throttle position sensor. If system will not go into Sensor Test Mode (no code 88), replace SMEC.
- With DRB II connected to engine harness connector, connect a voltmeter to Dark Green/Black wire of injector harness 6-pin connector and ground. Put system in ATM Test Mode "02". If voltmeter reading is zero, repair open circuit in injector harness connector to wiring harness splice. If voltmeter reading is within one volt of battery voltage, go to NS3 below.