Test B - Vehicle Battery
- Turn key ON, leaving engine OFF. Set DVOM to 20 volt scale and measure voltage across battery terminals. If less than 10.5 volts, service discharged battery. If 10.5 volts or higher, go to next step.
- Turn key ON, leaving engine OFF. With ECA connected, set DVOM to 20 volt scale. Measure voltage between battery negative post and signal return circuit in Self-Test connector. If less than .5 volts, go to step 6). If .5 volts or higher, go to next step.
- With breakout box installed and ECA connected, turn key ON, leaving engine OFF. Set DVOM to 20 volt scale. Measure voltage between battery negative post and test pins 40 and 60. If either is .5 volts or higher, repair ground circuit and repeat QUICK TEST. If both are less than .5 volts, go to next step.
- With ECA connected, turn key OFF and wait 10 seconds. Set DVOM to 200 ohm scale. Measure resistance between test pin 46 and test pins 40 and 60. If either is 5 ohms or higher, disconnect ECA connector and inspect for corrosion or damage. Repair wiring and recheck resistance. If reading is still too high, replace ECA and repeat QUICK TEST. If both readings are less than 5 ohms, go to next step.
- With ECA connected, turn key OFF and wait 10 seconds. Set DVOM to 200 ohm scale. Measure resistance between test pin 46 and signal return circuit at Self-Test connector. If less than 5 ohms, repeat QUICK TEST as system is correct. If 5 ohms or higher, repair cause of excessive resistance in signal return circuit of harness. Repeat QUICK TEST.
- Turn key ON, leaving engine OFF. With ECA connected, set DVOM to 20 volt scale. Measure voltage between battery negative post and Keep Alive Power (KAPWR) circuit at EEC power relay. If less than 10.5 volts, check KAPWR and vehicle power (V Power) circuits for short to ground. Also check KAPWR circuit from power relay to battery positive post for open circuit. If 10.5 volts or higher, go to next step.
- Turn key ON, leaving engine OFF. With ECA connected, set DVOM to 20 volt scale. Measure voltage between battery negative post and ignition circuit at EEC power relay. If less than 10.5 volts, check for open ignition switch circuits. Repair wiring and repeat QUICK TEST. If 10.5 volts or higher, go to next step.
- Turn key ON, leaving engine OFF. With ECA connected, set DVOM to 20 volt scale. Measure voltage between battery negative post and ground circuit at EEC power relay. If .5 volts or higher, repair open circuit or short to ground in ground circuit and repeat QUICK TEST. If less than .5 volts, go to next step.
- Turn key ON, leaving engine OFF. With ECA connected, set DVOM to 20 volt scale. Measure voltage between battery negative post and vehicle power circuit at EEC power relay. If less than 10.5 volts, replace power relay and repeat QUICK TEST. If 10.5 volts or higher, repair short to ground or open in V Power circuit from EEC power relay to test pins 37 and 57. Repeat QUICK TEST.