Suzuki Wagon R Manual page 1176

6-1-84 GENERAL INFORMATION AND ENGINE DIAGNOSIS
DTC P0510 CLOSED THROTTLE POSITION (CTP) SWITCH MALFUNCTION
CIRCUIT DESCRIPTION – Refer to DTC P0505 section.
DTC DETECTING CONDITION
D Even when vehicle is started from stop and
accelerated to specified vehicle speed, CTP switch
does not turn from ON to OFF (or from OFF to ON).
2 driving cycle detection logic, continuous
monitoring
NOTE:
When DTC P0105, P0120 and/or P0510 are indicated together, it is possible that "WHT/GRN" circuit is
open.
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF, clear DTC with ignition switch ON and start engine.
2) Increase vehicle speed to 20 mph, 32 km/h and then stop vehicle.
3) Repeat above step 2) 15 times.
4) Check pending DTC in "ON BOARD TEST" or "PENDING DTC" mode and DTC in "DTC" mode.
INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check CTP Switch Operation.
1) Connect SUZUKI scan tool to DLC with ignition
switch OFF.
2) Turn ignition switch ON.
Does CTP switch operate properly under following
conditions respectively? See Fig. 1.
Condition "A": ON displayed on scan tool
Condition "B": OFF displayed on scan tool
Is test result satisfactory?
3 Check CTP switch.
1) Arrange 3 new 1.5 V batteries in series (4.5 V in
total).
2) Connect these batteries to CTP switch terminals
"4" and "5".
3) Under following each condition, check voltage
between CTP switch terminals "6" and "5".
See Fig. 2.
Condition "A": 0 – 1 V
Condition "B": 3.5 – 5.5 V
Is measured voltage as specified?
Fig. 1 for Step 2
Condition "A":
throttle lever is in contact
with ISC actuator plunger
Condition "B":
Throttle lever is apart
from plunger
ACTION
Fig. 2 for Step 3
Lever is apart
from plunger
Lever contacts
with plunger
POSSIBLE CAUSE
D "WHT /GRN", "YEL/RED" or "BLK/YEL" circuit open
or short
D CTP switch malfunction
D ECM (PCM) malfunction
YES
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to
"Intermittent and
Poor Connection in
Section 0A.
Check "WHT/GRN",
"YEL/RED" and
"BLK/YEL" wires and
connections for open
or short.
If wires and
connections are OK,
substitute a known-
good ECM (PCM) and
recheck.
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Go to Step 3.
Replace ISC motor
set (throttle body with
ISC actuator).