The barometric pressure sensor converts the barometric
pressure into a voltage signal and inputs the signal to the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
In response to the signal, the engine-ECU <M/T> or engine-A/T-ECU <A/T> corrects
the fuel injection amount, etc.
TROUBLE JUDGMENT
Check Conditions
2 seconds later after the ignition switch has been in “ON” position
or the engine has started up.
The battery voltage of 8 V or more.
Judgment Criteria
The sensor output voltage of 4.5 V or more (atmospheric pressure above 114 kPa or equivalent)
for 2 seconds,
or
The sensor output voltage of 0.2 V or less (atmospheric pressure below 53
kPa or equivalent) for 2 seconds.
PROBABLE CAUSE
Failed barometric pressure sensor
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q.
Is the diagnosis code set?
Replace engine-ECU <M/T> or engine-A/T-ECU <A/T>.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points ).