Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 73
1A-239 Engine General Information and Diagnosis: For Petrol Engine Model
Reference waveform No.22
Throttle actuator output signal with ignition switch turned
ON
Reference waveform No.23
Throttle actuator output signal with ignition switch turned
ON
Reference waveform No.24
Manifold absolute pressure sensor signal (1) with
ignition switch turned ON
Measurement
terminal
CH1: “C37-45” to “C37-58”
CH2: “C37-44” to “C37-58”
Oscilloscope
setting
CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Ignition switch turned ON and
accelerator pedal at idle position
1. Throttle actuator drive signal (“C37-45” terminal)
2. Throttle actuator drive signal (“C37-44” terminal)
3. ON signal
4. OFF signal
5. One duty cycle
I4RS0B110081-02
Measurement
terminal
CH1: “C37-45” to “C37-58”
CH2: “C37-44” to “C37-58”
Oscilloscope
setting
CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Ignition switch turned ON and
accelerator pedal at full
depressed position
1. Throttle actuator drive signal (“C37-45” terminal)
2. Throttle actuator drive signal (“C37-44” terminal)
3. ON signal
4. OFF signal
5. One duty cycle
Measurement
terminal
CH1: “C37-55” to “C37-57”
CH2: “C37-54” to “C37-41”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Ignition switch turned ON
2. Throttle position sensor (main) signal
I4RS0B110082-02
I4RS0B110070-01
Engine General Information and Diagnosis: For Petrol Engine Model 1A-240
Reference waveform No.25
Manifold absolute pressure sensor signal (1) with engine
racing
Reference waveform No.26
Knock sensor signal at engine speed 4000 r/min.
Reference waveform No.27
Knock sensor signal at engine speed 4000 r/min.
Reference waveform No.28
Oil control valve signal with engine idling (M16A engine)
Measurement
terminal
CH1: “C37-55” to “C37-57”
CH2: “C37-54” to “C37-41”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine racing
2. Throttle position sensor (main) signal
3. Racing
4. Idle
Measurement
terminal
CH1: “C37-56” to “C37-58”
Oscilloscope
setting
CH1: 1 V/DIV
TIME: 10 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Run engine at 4000 r/min.
I5JB0A110093-01
I4RS0B110072-01
Measurement
terminal
CH1: “C37-56” to “C37-58”
Oscilloscope
setting
CH1: 1 V/DIV
TIME: 200
µs/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Run engine at 4000 r/min.
Measurement
terminal
CH1: “C37-60” to “C37-59”
Oscilloscope
setting
CH1: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition
At the moment of the ignition switch
turned on
1. ON signal
2. OFF signal
3. Only duty cycle
I4RS0B110073-01
I4RS0B110074-01
1A-241 Engine General Information and Diagnosis: For Petrol Engine Model
Reference waveform No.29
Oil control valve signal with engine racing (M16A engine)
Reference waveform No.30
CAN communication line signal with ignition switch
turned ON
Reference waveform No.31
Ignition coil signal and fuel injector signal with engine
cranking
Measurement
terminal
CH1: “C37-60” to “C37-59”
Oscilloscope
setting
CH1: 5 V/DIV
TIME: 400
µs/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Drive vehicle at 20 km/h (12 mph)
and depress accelerator pedal
fully
1. Accelerator pedal depressed fully
2. Accelerator pedal depressed partially
3. Oil control valve signal
4. ON signal
5. OFF signal
Measurement
terminal
CH1: “E23-4” to “C37-58”
CH2: “E23-19” to “C37-58”
Oscilloscope
setting
CH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 40
µs/DIV
Measurement
condition
Ignition switch turned ON
(Signal pattern is depending on
communication data)
1. CAN communication line signal (High)
2. CAN communication line signal (Low)
I4RS0B110075-01
I5JB0A110094-01
Measurement
terminal
CH1: “C37-52” to “C37-58”
CH2: “C37-21” to “C37-58”
CH3: “C37-1” to “C37-58”
CH4: “C37-22” to “C37-58”
Oscilloscope
setting
CH1: 5 V/DIV, CH2: 5 V/DIV
CH3: 50 V/DIV, CH4: 10 V/DIV
TIME: 200 ms/DIV
Measurement
condition
• After warmed up to normal
operating temperature
• Engine at cranking
[A]: J20A engine
[B]: M16A engine
1. Cylinder reference signal (CMP reference signal)
2. Ignition coil signal
3. No.1 fuel injector signal
4. Engine start signal
I5JB0A110095-01
Engine General Information and Diagnosis: For Petrol Engine Model 1A-242
Resistance Check
1) Remove ECM from its bracket referring to “Engine Control Module (ECM) Removal and Installation: For Petrol
CAUTION
!
Never touch terminals of ECM itself or connect voltmeter or ohmmeter (2).
2) Connect special tool to ECM connectors securely.
NOTE
Do not connect the other connector of special tool to ECM.
3) Check resistance between each pair of terminals of disconnected connectors (1) as listed in the following table.
CAUTION
!
• Be sure to connect ohmmeter probe from wire harness side of coupler.
• Be sure to turn OFF ignition switch for this check.
• Resistance in the following table represents that measured when parts temperature is 20
°C (68 °F).
1
2
I4RS0A110086-02
Terminals
Circuit
Standard resistance
Condition
E23-60 to E23-29
Main relay
160 – 240
Ω
Battery disconnected
and ignition switch
turned ON
E23-15 to E23-29
Fuel pump relay
160 – 240
Ω
—
C37-16 to E23-1/16 No.3 fuel injector
10.8 – 18.2
Ω
—
C37-17 to E23-1/16 No.4 fuel injector
C37-5 to E23-1/16 EGR valve (stepping motor No.1 coil)
20 – 31
Ω
—
C37-13 to E23-1/16 EVAP canister purge valve
28 – 35
Ω
—
C37-2 to E23-1/16 No.2 fuel injector
10.8 – 18.2
Ω
—
C37-6 to E23-1/16 EGR valve (stepping motor No.2 coil)
20 – 31
Ω
—
C37-3 to E23-1/16 EGR valve (stepping motor No.4 coil)
C37-4 to E23-1/16 EGR valve (stepping motor No.3 coil)
C37-1 to E23-1/16 No.1 fuel injector
10.8 – 18.2
Ω
—
C37-33 to E23-1/16 Intake manifold tuning vacuum solenoid valve
33 – 45
Ω
—
C37-60 to C37-59
Oil control valve (M16A engine)
6 – 15
Ω
—
E23-50 to E23-1/16 Throttle actuator control relay
160 – 240
Ω
—
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