Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 186

TERMINAL WIRE
NUMBER COLOR
C51-3-2 ORN/BLU
C51-3-3 WHT/BLU
C51-3-4 RED
C51-3-5 BLK/RED
C51-3-6 GRY
C51-3-7 –
C51-3-8 LT BLU
C51-3-9 YEL/GRN
CIRCUIT
CKP sensor signal (–) (if
equipped)
CKP sensor signal (+) (if
equipped)
Oxygen signal of heated oxy-
gen sensor-1 (Bank 1) (if
equipped)
Heater output of heated oxy-
gen sensor-1 (Bank 2) (if
equipped)
Heater output of heated oxy-
gen sensor-1 (Bank 1) (if
equipped)
–
Intake air temp. (IAT) sensor
signal
Position signal for CMP sen-
sor
ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE) 6-1-45
NORMAL
VOLTAGE
0 – 1 V Ignition switch turned ON
Engine running at idling after warming
✱
4 – 6 V up between CKP sensor signal (–) and
↑↓
(+).
–4 – –6 V (Input signal is sinusoidal waveform.
(Repeated Waveform frequency varies depending
indicator) on engine speed. Signal generated
450Hz at idling speed)
0 – 1 V Ignition switch turned ON
Engine running at idling after warming
✱
4 – 6 V up between CKP sensor signal (–) and
↑↓
(+).
–4 – –6 V (Input signal is sinusoidal waveform.
(Repeated Waveform frequency varies depending
indicator) on engine speed. Signal generated
450Hz at idling speed)
0.5 – 1.5 V Ignition switch turned ON
✱
Deflects
between
While engine running at 2,000 r/min. for
over 0.5 V
1min. or longer after warmed up
and under
0.45 V
10 – 14 V Ignition switch turned ON
✱
0 – 1 V Engine running at idling after warming
↑↓
up.
10 – 14 V (Output signal is active low duty pulse.
(Repeated Duty ratio varies depending on engine
indicator) condition.)
10 – 14 V Ignition switch turned ON
✱
0 – 1 V Engine running at idling after warming
↑↓
up.
10 – 14 V (Output signal is active low duty pulse.
(Repeated Duty ratio varies depending on engine
indicator) condition.)
–
Ignition switch turned ON, IAT at 0°C,
3.7 – 3.9 V
32°F
Ignition switch turned ON, IAT at 40°C,
1.8 – 2.1 V
104°F
Ignition switch turned ON, IAT at 80°C,
1.5 – 1.75 V
176°F
Engine running at idling after warming
✱
0 – 1 V
up.
↑↓
(Sensor signal is pulse. Pulse fre-
4 – 6 V
quency varies depending on engine
(Repeated
speed. (360 pulses are generated par
indicator)
1camshaft revolution))
CONDITION
–