Isuzu 1999 RODEO Workshop Manual page 1351

6E2–108
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
Manifold Absolute Pressure (MAP) Output Check
Step
1 1. Turn the ignition "OFF" and leave it "OFF" for 15
seconds.
2. Ignition "ON." Don't crank engine.
3. The Tech 2 should indicate a manifold absolute
pressure (MAP) sensor voltage.
4. Compare this scan reading to scan reading of a
known good vehicle obtained using the exact same
procedure as in Steps 1–4.
Is the voltage reading the same +/–0.40 volt?
2 1. Disconnect the MAP sensor and plug inletmanifold.
2. Connect a hand vacuum pump to the MAP sensor.
3. Start the engine.
4. Apply 34 kPa (10 Hg) of vacuum and note the
voltage change.
Is the voltage change 1.5-2.1 volts less than step 1?
3 Check the sensor cover for leakage or restriction.
Does the cover supply vacuum to the MAP sensor
only?
4 Repair the material to block.
Is the action complete?
5 Check the sensor connection.
Is the sensor connection good?
6 Refer to On-Vehicle Service, MAP Sensor.
Is the action complete?
7 Repair the poor connection.
Is the action complete?
Action Value(s) Yes
Go to Step 2
—
— Go to Step 3
Go to Step 5
—
— Verify repair
— Go to Step 5
— Verify repair
— Verify repair
No
Go to Step 5
Go to Step 4
Go to Step 4
—
Go to Step 6
—
—