Test BB - Temperature Compensated Accelerator Pump Test
- Turn ignition off and wait 10 seconds. Disconnect temperature compensated accelerator pump solenoid harness connector. With DVOM on 200 ohm scale, measure resistance of solenoid. If resistance is between 50-100 ohms, reconnect solenoid and go to next step. If less than 50 ohms or greater than 100 ohms, replace solenoid and repeat QUICK TEST .
- Turn ignition off and wait 10 seconds. Enter Output State Check and perform KEY ON-ENGINE OFF (KOEO) SELF-TEST until end of Continuous code display. DVOM will indicate zero volts. Depress and release throttle and observe DVOM. If DVOM registered high voltage, remain in Output State Check and go to next step. If DVOM did not register high voltage, depress throttle to wide open position and release. If voltage still does not register high reading, go to TEST D , step 13).
- Remain in Output State Check. Turn ignition on, engine off. With DVOM on 20 volt scale, connect positive lead to vehicle battery circuit on solenoid and negative lead to temperature compensated pump output circuit at solenoid. While observing DVOM, depress and release throttle several times to cycle output on and off. If output cycles on and off, go to next step. If output does not cycle on and off, go to step 6 .
- Remain in Output State Check. Install vacuum pump to solenoid vacuum supply port and vacuum gauge to solenoid output port. Apply and maintain a minimum of 6 in. Hg. Depress and release throttle several times to cycle output on and off and observe vacuum does not cycle on and off, replace solenoid and repeat QUICK TEST .
- Remove all test equipment and vacuum source. Disconnect vacuum lines at temperature compensated accelerator pump solenoid. Start engine and check for vacuum. If vacuum is present, EEC-IV system is operating properly, check fuel system. If no vacuum is present, repair vacuum leak or blockage and repeat QUICK TEST .
- Turn ignition on (engine off). With DVOM on 20 volt scale, connect positive lead to vehicle power circuit at solenoid connector and negative lead to ground. If voltage is 10.5 volts or less, repair open circuit and repeat QUICK TEST . If voltage is 10.5 volts or greater, go to next step.
- Turn ignition off and wait 10 seconds. Disconnect 60-pin connector at ECA and inspect connectors for damage. Repair as required. Connect breakout box and leave ECA disconnected. With DVOM on 200 ohm scale, measure continuity from box pin 54 to temperature compensated pump circuit at harness connector. If resistance is 5 ohms or greater, repair open circuit and repeat QUICK TEST . If less than 5 ohms, go to next step.
- Turn ignition off and wait 10 seconds. Reconnect harness at pump solenoid. Breakout box installed (ECA disconnected). With DVOM on 200,000 ohm scale, measure resistance from box pin 54 to box pins 37 and 57. If resistance is 10,000 ohms or greater, go to next step. If resistance is less than 10,000 ohms, repair short and repeat QUICK TEST .
- Turn ignition off and wait 10 seconds. Breakout box installed (ECA and solenoid disconnected). With DVOM on 200,000 ohm scale, measure resistance from box pin 54 to pins 40, 46, and 60. If readings are less than 10,000 ohms, repair short to ground and repeat QUICK TEST . If readings are 10,000 ohms or greater, replace ECA. Repeat QUICK TEST .