Service manual

90-898303 2-20
1996 and newer 2.5L - Fuel Pump Test
VOLTAGE TEST CHART
Engine Mode BLACK Meter Lead to
Engine Ground; RED
Meter Lead to:
Approximate Voltage
Reading
If Approximate
Voltage is not
obtained, this
indicates:
1. All models (+) terminal of fuel
pump
12 – 13.5 volts If reading is below 12
volts, the battery is bad,
discharged or has bad
connection(s). If
reading is higher than
13.5 volts, the battery is
over-charged
2. Ignition key in “OFF”
position.
(-) terminal of fuel
pump
Same reading should
be obtained as reading
in check No. 1 (above)
If reading is lower than
in test 1, there is an
open circuit in fuel
pump.
3. Ignition key in “ON”
position and engine
NOT running.
(-) terminal of fuel
pump
1.5 volt or less (voltage
should rise to 12 – 13.5
volts after
approximately 30
seconds.
Bad ECM or bad fuel
pump.*
4. Engine being
cranked.
(-) terminal of fuel
pump
1.5 volt or less. Bad ECM or bad fuel
pump.*
* Check for proper electrical operation of electric fuel pump.
25