Suzuki 2000 Grand Vitara SQ625 Service Manual page 578

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
Removal
1) Disconnect negative cable at battery.
2) Disconnect connector from MAP sensor.
3) Remove MAP sensor from intake manifold.
Inspection
1) Check vacuum passage on intake manifold, and vacuum pas-
1
2) Check sensor O-ring for damage and deterioration.
1. O-ring
3) Arrange 3 new 1.5 V batteries in series and connect its positive
1. MAP sensor
2. 1.5 V battery
(4.5 – 5.5 V in total)
4) Install MAP sensor securely.
3. Vacuum pump
5) Connect MAP sensor coupler securely.
ENGINE AND EMISSION CONTROL SYSTEM (G16 / J20 ENGINE) 6E1-41
sage for clog. Clean if clogged.
CAUTION:
Do not put wires into air vent hole for cleaning.
It causes damage in sensor.
Replace as necessary.
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
MAP sensor, make absolutely sure to connect properly
as shown in left figure.
Output voltage (When sensor input voltage is 4.5 – 5.5 V,
ambient temp. 20 – 30_C, 68 – 86_F)
ALTITUDE
(Reference)
(ft) (m)
0 0
j j
2 000 610
2 001 611
j j
5 000 1 524
5 001 1 525
j j
8 000 2 438
8 001 2 439
j j
10 000 3 048
If check result is not satisfactory, replace MAP sensor.
BAROMETRIC
PRESSURE
(mmHg) (kPa)
760 100
j j
707 94
94
Under 707
j
over 634
85
85
Under 634
j
over 567
76
76
Under 567
j
over 526
70
OUTPUT
VOLTAGE
(V)
3.3 – 4.3
3.0 – 4.1
2.7 – 3.7
2.5 – 3.3