Suzuki Grand Vitara JB416 / JB420. Manual — part 71
1A-233 Engine General Information and Diagnosis:
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 (for M16
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
Engine General Information and Diagnosis: 1A-234
Reference waveform No.29
Oil control valve signal with engine racing (for M16
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]: For J20 engine
[B]: For M16 engine
1. Cylinder reference signal (CMP reference signal)
2. Ignition coil signal
3. No.1 fuel injector signal
4. Engine start signal
I5JB0A110095-01
1A-235 Engine General Information and Diagnosis:
Resistance Check
1) Remove ECM from its bracket referring to “Engine Control Module (ECM) Removal and Installation in Section 1C”.
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 (for M16 engine)
6 – 15
Ω
—
E23-50 to E23-1/16 Throttle actuator control relay
160 – 240
Ω
—
Engine General Information and Diagnosis: 1A-236
ECM Power and Ground Circuit Check
S5JB0A1104064
Wiring Diagram
E23
C37
3
4
18
19
5
6
7
10
11
17
20
47
46
49
50
51
21
22
52
16
25
9
24
14
29
55
57
54 53
59
60
58
2
26
27
28
15
30
56
48
32
31
34
35
36
37
40
42
39 38
44
45
43
41
33
1
12
13
23
8
3
4
18
19
5
6
7
10
11
17
20
47
46
49
50
51
21
22
52
16
25
9
24
14
29
55
57
54 53
59
60
58
2
26
27
28
15
30
56
48
32
31
34
35
36
37
40
42
39 38
44
45
43
41
33
1
12
13
23
8
BLK/WHT
BLU/BLK
BLU/BLK
BLU/BLK
BLK/RED
BLK/RED
BLK/RED
BLK/YEL
BLU
12V
5V
2
1
3
12
13
14-1
15-1
15-2
14-2
4
6
E23-29
E23-1
E23-60
E23-16
9
10
11
WHT
E23-2
WHT/GRN
GRY/RED
BLU
RED/WHT
GRY/GRN
C37-14
C37-9
C37-55
C37-57
GRY/BLK
C37-12
E23-55
BLU/YEL
BLU/RED
C37-45
C37-44
5
C37-15
C37-29
C37-48
BLK/ORN
C37-58
C37-30 BLK/ORN
BLK/YEL
BLK/YEL
BLK/YEL
E23-56
E23-54
E23-53
E23-52
E23-51
C37-53
C37-54
C37-40
C37-41
WHT/BLU
WHT
ORN
ORN/BLU
BLU/GRN
BLU/YEL
WHT
BLK
RED
GRN
WHT
WHT
8
7
I5JB0A110096-01
1. Fuse box No.2
6. ECM
11. Electric load current sensor (for J20
engine)
15-1. TP sensor (main)
2. Ignition switch
7. “IG ACC” fuse
12. MAP sensor
15-2. TP sensor (sub) (for AMT model)
3. Main relay
8. “FI” fuse
13. A/C refrigerant pressure sensor (if
equipped with A/C)
4. Junction block
9. “DOME” fuse
14-1. Accelerator pedal position (APP)
sensor (main)
5. “IG COIL” fuse
10. DLC
14-2. Accelerator pedal position (APP)
sensor (sub)
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