Suzuki Wagon R Manual page 385

6-46 ENGINE DIAGNOSIS
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 114.7 kPa or more or 43 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 "Lg/R" and "Br/W" wire
terminals.
3) If OK, then with ignition switch ON, check
voltage at each of "W/G" and "Lg/R" wire
terminals. See Fig. 2.
Is voltage about 4 – 6 V at each terminal?
4 Check MAP sensor according to "MAP
Sensor Individual Check".
Is it in good condition?
Fig. 1 for Step 2
ACTION
Fig. 2 for Step 3
YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
"W/G" wire shorted to
"Lg/R" wire, "Br/W" wire
open, poor E21-10
connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Intermittent trouble.
Check for intermittent
referring to
"INTERMITTENT AND
POOR CONNECTION" in
Section 0A.
"W/G" wire open or
shorted to ground circuit or
shorted to power circuit,
"Lg/R" wire open or
shorted to ground, poor
E21-26 connection or
E21-22 connection.
If wire and connection are
OK, confirm that MAP
sensor is normal and then
substitute a known-good
ECM and recheck.
NOTE: When battery
voltage is applied to
"W /G" wire, it is possible
that MAP sensor is also
faulty.
Replace MAP sensor.