Suzuki 2006 SX4 Service Manual page 222

1C-3 Engine Electrical Devices:
Electric Throttle Body Assembly Operation Check
1) Remove air cleaner outlet hose.
2) Turn ON ignition switch.
3) Depress accelerator pedal gradually and check that
throttle valve moves smoothly until it opens fully.
4) Release accelerator pedal depressed in Step 3) and
check that throttle valve (1) moves back to default
position (position where throttle valve is open by 7°
(2) from its completely closed position).
2
If check result is satisfactory, electric throttle body
system is in good condition. If check result is not
satisfactory, proceed to next step.
5) Perform "Accelerator Pedal Position (APP) Sensor
Assembly On-Vehicle Inspection", "Throttle Actuator
(Motor) Check" and "Throttle Position Sensor
Performance Check".
If check results are not satisfactory, replace electric
throttle body assembly.
If check results are satisfactory, wire circuit and/or
ECM are faulty.
Throttle Actuator (Motor) Check
1) Turn OFF ignition switch.
2) Disconnect connector from electric throttle body
assembly.
3) Measure resistance between "M1" terminal (1) and
"M2" terminal (2) of electric throttle body assembly.
If measured resistance is out of specified value,
replace electric throttle body assembly.
Throttle actuator (motor) resistance
0.3 – 100 Ω at 20 °C, 68 °F
1
I5JB0A130035-01
1 2
I7RW01130003-01
Throttle Position (TP) Sensor Performance Check
1) Remove air cleaner outlet hose.
2) Turn OFF ignition switch.
3) Disconnect connector from electric throttle body
assembly.
4) Check TP sensor (main and sub) output voltage as
the following steps.
a) For TP sensor (main), arrange 3 new 1.5 V
batteries (1) in series (check that total voltage is
4.5 – 5.0 V) and connect its positive terminal to
"Vin" terminal (2) and negative terminal to
"Ground" terminal (3) of sensor. Then using
voltmeter, connect positive terminal to "Vout 1"
terminal (4) of sensor and negative terminal to
battery.
4
b) For TP sensor (sub), arrange 3 new 1.5 V
batteries (1) in series (check that total voltage is
4.5 – 5.0 V) and connect its positive terminal to
"Vin" terminal (2) and negative terminal to
"Ground" terminal (3) of sensor. Then using
voltmeter, connect positive terminal to "Vout 2"
terminal (4) of sensor and negative terminal to
battery.
c) Measure output voltage variation while throttle
valve is opened and closed as the following
specification.
If sensor voltage is out of specified value and linear
variation as the following graph, replace electric throttle
body assembly.
TP sensor output voltage
TP sensor (main) [A]: 0.45 – 4.88 V, varying
according to throttle valve opening by finger
(Voltage should vary by 0.04 V for each 1° valve
opening)
2 3
1
I7RW01130004-01
4
3
2
1
I7RW01130005-01