Suzuki RA410 Manual page 417

6E1-52 ENGINE AND EMISSION CONTROL SYSTEM
TERMINAL ARRANGEMENT OF ECM/PCM
COUPLER (VIEWED FROM HARNESS SIDE)
SENSOR
MAP SENSOR
OUTPUT VOLTAGE CHECK
A8 1) Remove ECM/PCM according to previously outlined proce-
dure.
2) Connect connectors to ECM/PCM securely.
3) With connector connected to ECM/PCM, connect digital type
A19
voltmeter as shown and check that ECM/PCM supply voltage
4.75 – 5.25V is applied to connector terminal "A8".
4) Check output voltage at connector terminal "A19".
Note that it varies with atmospheric pressure and altitude.
Also, start engine, if it can, and check if output voltage varies.
Output voltage (ECM/PCM supply voltage 4.75 – 5.25V, am-
bient temp. 10 – 40 C (50 – 104 F))
NOTE:
Note that atmospheric pressure varies depending on
weather conditions as well as altitude.
Take that into consideration when performing above
check.
If check result is not satisfactory in above step 3) or 4), check
MAP sensor and its circuit according to flow table of diagnostic
trouble code No. 11.
NOTE:
If output voltage does not vary when engine is started, it is
possible that vacuum hose and/or filter are clogged. Clean
them.
Another possibility is that filter in MAP sensor is clogged
from freezing. If it is suspected, leave it at room tempera-
ture (20 C (68 F)) for a while and recheck.
5) Upon completion of checking, install ECM/PCM and connect
ECM/PCM connector securely.
ALTITUDE
(Reference)
(ft) (m)
0 0
1000 305
2000 610
3000 914
4000 1219
5000 1524
6000 1829
7000 2133
8000 2438
9000 2743
10000 3048
BAROMETRIC OUTPUT
PRESSURE VOLTAGE
(mmHg)
760 1.85 – 2.43
733 1.80 – 2.37
707 1.75 – 2.31
682 1.70 – 2.25
658 1.65 – 2.20
634 1.60 – 2.15
611 1.55 – 2.10
589 1.51 – 2.05
567 1.47 – 2.00
546 1.42 – 1.95
526 1.38 – 1.91
(V)