Suzuki Liana RH418, Supplementary Service Manual

Page: 66 / 371

1A-53 Engine General Information and Diagnosis:
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.
3) Check throttle valve opening percentage displayed on
scan tool while opening throttle valve from idle position
to full open position.
Is it displayed 2% or less (for Step 2)) or 96% or higher (for
Step 3))?
Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”.
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”, “GRY/BLU” and “ORN” wire terminals.
3) If OK, then with ignition switch ON, check voltage
between each of “GRY/RED” or “GRY/BLU” wire
terminals and body ground.
Is voltage about 4 – 6 V at each terminal?
Go to Step 4. “GRY/RED” wire open,
“GRY/RED” wire
shorted to ground or
power circuit or “GRY/
BLU” wire, “ORN” wire
open or shorted to
ground circuit or poor
“C41-22” or “C41-16”
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.
TP sensor resistance
Between “1” and “2”: 2.5 – 6.0 k
Ω
Between “1” and “3”: 100
Ω
– 20 k
Ω
varying
according to throttle valve opening.
Are measured values within specifications?
“ORN” wire open or
poor “C41-10”
connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck. Replace TP sensor.
Step Action Yes No
I2RH0B110027-01
I2RH0B110028-01