Suzuki GA413, Service Manual

Page: 824 / 1246

6-48 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 TP Sensor and Its Circuit.
1) Connect scan tool to DLC with ignition
switch OFF and then turn ignition switch
ON.
2) Check throttle valve opening percentage
displayed on scan tool.
Is it displayed 0% or 100%?
Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0 A.
3 Check Wire Harness.
1) Disconnect connector from TP sensor
with ignition switch OFF.
2) Check for proper connection to TP sensor
at “LT GRN/RED”, “GRY/YEL” and
“BLU/YEL” wire terminal.
3) If OK, then with ignition switch ON, check
voltage at each of “LT GRN/RED” and
“GRY/YEL” wire terminals and body
ground. See Fig. 1.
Is voltage about 4 – 6 V at each terminal?
Go to Step 4. “LT GRN/YEL” wire open,
“LT GRN/YEL” wire shorted
to ground circuit or power
circuit or “BLU/YEL” wire,
“GRY/YEL” wire open or
shorted to ground circuit or
poor C23-26 or C23-33
connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
4 Check TP Sensor.
1) Check resistance between terminals of TP
sensor. See Fig. 2.
Between 1 and 2: 2.5 – 6.0 k
W
Between 1 and 3: Varying according to
throttle valve opening (0.02 – 6.0 k
W
)
Are measured values within specifications?
“BLU/YEL” wire open or
poor C23-34 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck. Replace TP sensor.
Fig. 1 for Step 3 Fig. 2 for Step 4