Suzuki GA413 Service Manual page 824

6-48 ENGINE GENERAL INFORMATION AND DIAGNOSIS
INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE"
performed?
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%?
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?
4 Check TP Sensor.
1) Check resistance between terminals of TP
sensor. See Fig. 2.
Between 1 and 2: 2.5 – 6.0 kW
Between 1 and 3: Varying according to
throttle valve opening (0.02 – 6.0 kW)
Are measured values within specifications?
Fig. 1 for Step 3
ACTION
Fig. 2 for Step 4
YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
"BLU/YEL" wire open or
poor C23-34 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 0 A.
"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.
Replace TP sensor.