Suzuki GRAND VITARA XL-7 Owner's Manual page 216

TROUBLESHOOTING
Step
1 Was "ENGINE DIAG. FLOW TABLE" per-
formed?
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 3% or less?
3) Check throttle valve opening percentage
displayed on scan tool while opening throttle
valve from idle position to full open position.
Is it displayed 96% or higher?
3 Check wire harness.
1) Disconnect connector from TP sensor with
ignition switch OFF.
2) Check for proper connection to TP sensor at
"GRY/RED", "RED/GRN" and "GRY/YEL"
wire terminal.
3) If OK, then with ignition switch ON, check
voltage between each of "GRY/RED" or
"RED/GRN" wire terminals and body
ground.
Is voltage about 4 – 6 V at each terminal?
4 Check TP sensor.
1) Check resistance between terminals of TP
sensor referring to "TP SENSOR" in Section
6E2.
Are measured values within specifications?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE) 6-1-55
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
"RED/GRN" wire shorted
to power circuit.
If wire is OK, substitute a
known-good ECM (PCM)
and recheck.
No
Go to "ENGINE DIAG.
FLOW TABLE".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection" in
Section 0A.
"GRY/RED" wire open,
"GRY/RED" wire shorted
to ground circuit or power
circuit or "RED/GRN"
wire, "GRY/YEL" wire
open or shorted to ground
circuit or poor C51-3-13 or
C51-3-9 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
Replace TP sensor.