Suzuki Baleno Manual page 1437

ENGINE GENERAL INFORMATION AND DIAGNOSIS (J18 ENGINE WITH WU TWC) 6-2-89
MANIFOLD DIFFERENTIAL PRESSURE SENSOR CHECK
1) Disconnect manifold differential pressure sensor coupler.
2) Remove manifold differential pressure sensor.
3) Check pressure passage and air vent hole for clog. Clean if
4) Arrange 3 new 1.5 V batteries in series and connect its positive
1. MDP sensor
2. 1.5 V battery
(4.5 – 5.0 V in total)
3. Vacuum pump
4. Digital type voltmeter
5) Install manifold differential pressure sensor.
clogged.
CAUTION:
Do not put drills or wires into passage and hole for
cleaning. It causes damage in it.
terminal to "Vin" terminal of coupler and negative terminal to
"Ground" terminal. Then check voltage between "Vout" and
"Ground".
Also, check if voltage reduces when vacuum is slowly applied
up to 400 mmHg by using vacuum pump.
CAUTION:
As connection to wrong terminal will cause damage
to manifold differential pressure sensor, make abso-
lutely sure to connect properly as shown in left figure.
Output voltage at "Vout" (When voltage at "Vin" is 4.5 V)
Applied vacuum value
(mmHg)
200
250
300
350
400
If check result is not satisfactory, replace manifold differential
pressure sensor.
Connect manifold differential pressure sensor coupler securely.
Manifold differential
pressure sensor output
voltage (V)
2.40 – 4.40
2.13 – 4.13
1.86 – 3.86
1.59 – 3.59
1.32 – 3.32