Suzuki WagonR+ RB310 Service Manual page 1806

INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE"
performed?
2 Check MAP Sensor and Its Circuit.
1) Connect scan tool to DLC with ignition
switch OFF.
2) Turn ignition switch ON.
3) Check intake manifold pressure.
See Fig. 1.
Is it 130 kPa or more or 5 kPa or less?
3 Check Wire Harness.
1) Disconnect MAP sensor connector with
ignition switch OFF.
2) Check for proper connection of MAP
sensor at "LT GRN/RED" and
"BRN/WHT" wire terminals.
3) If OK, then with ignition switch ON, check
voltage at each of "WHT/GRN" and
"LT GRN/RED" wire terminals.
See Fig. 2.
Is voltage about 4 – 6 V at each terminal?
4 Check MAP sensor according to "MAP
Sensor Individual Check" in Section 6E1.
Is it in good condition?
Fig. 1 for Step 2
DLC
Scan tool
ACTION
Fig. 2 for Step 3
GENERAL INFORMATION AND ENGINE DIAGNOSIS 6-1-43
YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
"WHT /GRN" wire shorted
to "LT GRN/RED" wire,
"BRN/WHT" wire open,
poor E23-9 connection.
If wire and connection are
OK, substitute a known-
good ECM (PCM) and
recheck.
"LT GRN /
RED"
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Intermittent trouble.
Check for intermittent
referring to
"INTERMITTENT AND
POOR CONNECTION" in
Section 0A.
"WHT /GRN" wire open or
shorted to ground circuit or
shorted to power circuit,
"LT GRN/RED" wire open
or shorted to ground, poor
E23-5 connection or
E23-1 connection.
If wire and connection are
OK, confirm that MAP
sensor is normal and then
substitute a known-good
ECM (PCM) and recheck.
NOTE: When battery
voltage is applied to
"WHT /GRN" wire, it is
possible that MAP
sensor is also faulty.
Replace MAP sensor.