Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 190

TERMINAL WIRE
NUMBER COLOR
C51-1-15 RED
C51-1-16 BLU/YEL
C51-1-17 YEL/WHT
C51-1-18 PNK
C51-1-19 GRN/BLU
C51-1-20 GRN/ORN
C51-2-1 GRN/BLK
C51-2-2 BLK/ORN
C51-2-3 BLK/WHT Ignition switch signal
CIRCUIT
4WD air pump assembly out-
put
A/T input shaft speed sensor
signal (+)
ECT sensor signal for combi-
nation meter
Pressure switch signal for
4WD air pump assembly
"L" position signal for transmis-
sion range switch (A/T)
"2" position signal for trans-
mission range switch (A/T)
EVAP canister purge valve
output
Ground of ECM for ignition cir-
cuit
ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE) 6-1-49
NORMAL
VOLTAGE
Ignition switch turned ON, Transfer
10 – 14 V
selector selected at "4L" or "4H" position
Ignition switch turned ON, Transfer
0 – 1 V
selector selected at "2H" position
0 – 1 V Ignition switch turned ON
Engine running at idling after warming
✱
4 – 6 V up between A/T input shaft speed sen-
↑↓
sor signal (–) and (+).
–4 – –6 V (Input signal is sinusoidal waveform.
(Repeated Waveform frequency varies depending
indicator) on engine speed. Signal generated
90Hz at idling speed)
Ignition switch turned ON
✱
0 – 0.6 V
(Output signal is 60 Hz active low duty
↑↓
pulse. Duty ratio varies depending on
4 – 6 V
ECT.)
(Repeated
ECT 40°C = 45% ON duty
indicator)
ECT 120°C = 85% ON duty
Ignition switch turned ON, Transfer
10 – 14 V selector lever selected at "4H" or "4L"
position
Ignition switch turned ON, Transfer
0 – 1 V
selector lever selected at "2H" position
Ignition switch turned ON, Selector
10 – 14 V
switch selected at "L" position
Ignition switch turned ON, Selector
0 – 1 V switch selected at other than "L" posi-
tion
Ignition switch turned ON, Selector
10 – 14 V
switch selected at "2" position
Ignition switch turned ON, Selector
0 – 1 V switch selected at other than "2" posi-
tion
Ignition switch turned ON with engine
10 – 14 V
stop
✱
0 – 0.6 V
Engine running.
↑↓
(Output signal is 9.8 Hz duty pulse.
10 – 14 V
Duty ratio varies depending on vehicle
(Repeated
condition.)
indicator)
Below 0.3 V Ignition switch turned ON
0 – 1 V Ignition switch turned OFF
10 – 14 V Ignition switch turned ON
CONDITION