1. Read map sensor voltage value
with engine running. If voltage
is less then.2volt go to step 6.
If voltage is more then.2volt turn
off engine then turn key back on engine off.
2 read the MAP sensor voltage value, if
it is less then 1.2 volts go to step 6
if it is more then 1.2volts wiggle sensor
connector and harness while watching
scan tools display.
3. If the voltage changes when the harness
is wiggled the harness or connector is bad
if the voltage does not change go to step 4
4. With engine running disconnect
map sensor connector, read voltage value
if sensor voltage is more then 4 volts
replace the sensor. If less then 4 volts
5. Check the voltage on map sensor
dark green/yellow wire or violet/white wire.
If less then 4 volts repair open in appropriate
wire. If more then 4 volts turn key off.
6. Disconnect the PCM and use a ohmeter
check resistance between the MAP sensor
connector and yellow black wire and black
dark green wire or dark green/red wire and black/light
blue wire. If resistance is less then 5
repair the short.
7 if more then 5 volts check reistance
of the MAP sensor connector
yellow/black wire or dark green/red wire
if resistance is less then 5 ohms repair short
to ground in appropriate wire.
If more then 5 ohms replace pcm.
Sunday, November 9th, 2008 AT 7:32 AM