Suzuki GA413, Руководство по обслуживанию

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6-42 ENGINE GENERAL INFORMATION AND DIAGNOSIS
GA413
supple
INSPECTION
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE”
performed? Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
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 146 kPa (43.2 inHg) or 0 kPa (0 inHg)?
Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “INTERMIT-
TENT AND POOR CON-
NECTION” in Section 0A.
3 Check Wire Harness.
1) Disconnect MAP sensor connector with
ignition switch OFF.
2) Check for proper connection of MAP
sensor at “LT GRN/YEL” and “BLU/YEL”
wire
terminals.
3) If OK, then with ignition switch ON, check
voltage at each of “LT GRN/RED” and
“LT GRN/YEL” wire terminals and body
ground. See Fig. 1.
Is voltage about 4 – 6 V at each terminal?
Go to Step 4. “LT GRN/RED” wire open
or shorted to ground circuit
or shorted to power circuit,
“LT GRN/YEL” wire open
or shorted to ground, poor
C23-25 connection or
C23-31 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 “LT
GRN/RED” wire, it is pos-
sible that MAP sensor is
also faulty.
4 Check MAP sensor referring to “MAP
Sensor Inspection” in Section 6E.
Is it in good condition? “LT GRN/RED” wire
shorted to “LT GRN/YEL”
wire, “BLU/YEL” wire open,
poor C23-34 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck. Replace MAP sensor.
Fig. 1 for Step 3