Suzuki GRAND VITARA JB416, Service Manual

Page: 69 / 474

Engine General Information and Diagnosis: 1A-51
C37-37 BLK
A/F sensor signal
(–)
2.6 – 2.8 V
(“Reference
waveform No.18: ”)
Engine running at idle
after warmed up engine.
—
C37-38 WHT
A/F sensor signal
(+)
3.0 – 3.2 V
(“Reference
waveform No.18: ”)
Engine running at idle
after warmed up engine.
—
C37-39 — — — — —
C37-40 RED
Throttle position
sensor (sub) signal
1.60 – 1.91 V
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.88 – 4.45 V
Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C37-41 GRN
Ground for throttle
position sensor
Below 0.3 V Ignition switch turned ON. —
C37-42 — — — — —
C37-43 — — — — —
C37-44
BLU/
RED
Output of throttle
actuator
0 – 1 V
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
Output signal is duty
pulse. Duty ratio varies
depending on throttle
valve and accelerator
pedal position.
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.22: ”
and “Reference
waveform No.23: ”)
Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C37-45
BLU/
YEL
Output of throttle
actuator
0 – 1 V
Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
Output signal is duty
pulse. Duty ratio varies
depending on throttle
valve and accelerator
pedal position.
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.22: ”
and “Reference
waveform No.23: ”)
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
C37-46 — — — — —
C37-47
BLK/
RED
Heater output of
heated oxygen
sensor-2
10 – 14 V Ignition switch turned ON. —
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.7: ” and
“Reference waveform
No.8: ”)
Engine running at idle
after warmed up engine.
Output signal is active low
duty pulse. Duty ratio
varies depending on
engine condition.
C37-48
BLK/
YEL
Ground for ECM Below 0.3 V Ignition switch turned ON. —
C37-49 — — — — —
C37-50 — — — — —
Terminal
No.
Wire
color
Circuit Normal voltage Condition Remarks