Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 68
1A-219 Engine General Information and Diagnosis: For Petrol Engine Model
DTC Confirmation Procedure
DTC P2227:
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and warm up
engine to normal operating temperature.
3) Check DTC and pending DTC by using scan tool.
DTC P2228 / P2229:
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch, clear DTC by using scan tool and run engine for 1 min.
3) Check DTC and pending DTC by using scan tool.
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting: For Petrol Engine Model”.
Step
Action
Yes
No
1
Was “Engine and Emission Control System Check”
performed?
Go to Step 2.
Go to “Engine and
Emission Control
System Check: For
Petrol Engine Model”.
2
Is DTC P2227 set?
Go to Step 3.
Substitute a known-
good ECM and recheck.
3
MAP sensor check
1) Check MAP sensor and its circuit referring to “DTC
P0107: Manifold Absolute Pressure Circuit Low Input:
For Petrol Engine Model”and/or “DTC P0108: Manifold
Absolute Pressure Circuit High Input: For Petrol Engine
Model”.
Is check result satisfactory?
Substitute a known-
good ECM and recheck.
MAP sensor or its circuit
malfunction.
Engine General Information and Diagnosis: For Petrol Engine Model 1A-220
Inspection of ECM and Its Circuits
S6JB0A1114080
ECM and its circuits can be checked by measuring voltage, pulse signal and resistance with special tool connected.
CAUTION
!
ECM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to ECM
with ECM connectors disconnected from it.
Voltage Check
1) Remove ECM (1) from its bracket referring to “Engine Control Module (ECM) Removal and Installation: For Petrol
2) Connect special tool between ECM and ECM connectors securely.
Special tool
(A): 09933–06320
3) Check voltage and/or pulse signal using voltmeter (2) and oscilloscope (3).
NOTE
• As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition
switch is turned ON.
• Voltage with asterisk (*) cannot be measured with voltmeter because it is pulse signal. Use
oscilloscope for its check if necessary.
• Before performed this inspection, be sure to read the “Precautions of ECM Circuit Inspection: For
Viewed from harness side
1
2
3
(A)
I5JB0A110073-01
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
I4RS0A110055-01
1A-221 Engine General Information and Diagnosis: For Petrol Engine Model
Terminal
No.
Wire
color
Circuit
Normal voltage
Condition
Remarks
C37-1
PNK
Fuel injector No.1
10 – 14 V
Ignition switch turned ON.
—
*0 – 0.6 V
↑↓
10 – 14 V
Petrol Engine Model”,
“Reference waveform
Engine Model” and
Engine running at idle
after warmed up engine.
Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C37-2
PNK/
BLK
Fuel injector No.2
10 – 14 V
Ignition switch turned ON.
—
*0 – 0.6 V
↑↓
10 – 14 V
and “Reference
Engine running at idle
after warmed up engine.
Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C37-3
YEL/
GRN
EGR valve
(stepper motor coil
3)
10 – 14 V
Ignition switch turned ON.
—
*0 – 1 V
↑↓
10 – 14 V
Ignition switch is turned to
ST (cranking) position.
Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C37-4
YEL
EGR valve
(stepper motor coil
4)
10 – 14 V
Ignition switch turned ON.
—
*0 – 1 V
↑↓
10 – 14 V
Ignition switch is turned to
ST (cranking) position.
Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C37-5
YEL/
BLK
EGR valve
(stepper motor coil
1)
10 – 14 V
Ignition switch turned ON.
—
*0 – 1 V
↑↓
10 – 14 V
Ignition switch is turned to
ST (cranking) position.
Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C37-6
YEL/
RED
EGR valve
(stepper motor coil
2)
10 – 14 V
Ignition switch turned ON.
—
*0 – 1 V
↑↓
10 – 14 V
Ignition switch is turned to
ST (cranking) position.
Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C37-7
BLU/
ORN
Power steering
pump pressure
switch signal
10 – 14 V
Ignition switch turned ON.
—
0 – 1 V
With engine at idle speed,
turning steering wheel to
the right or left as far as it
stops.
Engine General Information and Diagnosis: For Petrol Engine Model 1A-222
C37-8
BRN/
RED
(M16A
engine)
BRN/
BLK
(J20A
engine)
Generator field coil
monitor signal
10 – 14 V
Ignition switch turned ON.
Signal is duty pulse. Duty
ratio varies depending on
vehicle condition.
*0 – 1 V
↑↓
10 – 14 V
and “Reference
Engine running at idle
after warmed up engine.
C37-9
BLU
Electric load
current sensor
signal (J20A
engine)
0.5 – 1.0 V
Ignition switch turned ON.
—
1.3 – 1.7 V
Run engine at 2000 rpm,
headlight switch turned
ON.
1.8 – 2.4 V
Run engine at 2000 rpm,
headlight switch ON and
blower selector at HI
position.
C37-10
GRN/
WHT
CO adjusting
resistor signal
(J20A engine, if
equipped)
0 – 5 V
Ignition switch turned ON.
—
C37-11
RED
Oxygen signal of
heated oxygen
sensor-2
4 – 5 V
Ignition switch turned ON.
—
*Approx. 0.15 V
and “Reference
Engine running at idle
after warmed up engine.
C37-12
GRY/
BLK
A/C refrigerant
pressure sensor
signal (A/C model)
1.38 – 1.52 V
Engine running, A/C
switch OFF and blower
selector at OFF position,
A/C refrigerant pressure:
800 kPa (116 psi)
—
2.15 – 2.38 V
Engine running, A/C
switch ON and blower
selector at 1st position or
more, A/C refrigerant
pressure: 1400 kPa (203
psi)
2.67 – 2.95 V
Engine running, A/C
switch ON and blower
selector at 1st position or
more, A/C refrigerant
pressure: 1800 kPa (261
psi)
C37-13
GRN/
BLK
EVAP canister
purge valve output
10 – 14 V
Ignition switch turned ON
with engine at stop.
—
*0 – 0.6 V
↑↓
10 – 14 V
Set EVAP canister purge
valve at 52% by using
“Misc Test” of scan tool.
Output signal is active low
duty pulse. Duty ratio
varies depending on
vehicle condition.
Terminal
No.
Wire
color
Circuit
Normal voltage
Condition
Remarks
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