Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 529
10B-17 Body Electrical Control System:
BCM Power Circuit and Ground Circuit Check
S6JB0AA204007
Wiring Diagram
Troubleshooting
7
8
9
10
11
12
13
14
15
6
5
4
3
2
1
G32
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
G30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
G31
BLK
BLK
G32-1
G30-12
+B
G32-13
WHT
WHT/BLK G30-2
PPL/RED G30-1
3
2
1
4
I7JB01A20008-01
1. BCM
3. Battery
2. Ignition switch
4. Junction block
Step
Action
Yes
No
1
Fuse check
1) Turn ignition switch to OFF position.
2) Check circuit fuses for condition.
Are circuit fuses in good condition?
Go to Step 2.
Replace fuse and check
for short circuit to
ground.
2
Power supply circuit check
1) Disconnect connectors from BCM.
2) Check for proper connection to BCM connector at
terminal “G32-13”.
3) If OK, then measure voltage between “G32-13” terminal
of BCM and vehicle body ground.
Is voltage 10 – 14 V?
Go to Step 3.
Repair power supply
circuit.
3
Power supply circuit check
1) Check for proper connection to BCM connector at
terminals “G30-1” and “G30-2”.
2) If OK, turn ignition switch ON.
3) Measure voltage between following terminals.
• Between “G30-1” terminal of BCM connector and
vehicle body ground
• Between “G30-2” terminal of BCM connector and
vehicle body ground
Is each voltage 10 – 14 V?
Go to Step 4.
Repair power supply
circuit.
Body Electrical Control System: 10B-18
DTC B1133 (No. 1133): Battery Voltage Too High
S6JB0AA204008
Wiring Diagram
Refer to “BCM Power Circuit and Ground Circuit Check”.
DTC Detecting Condition and Possible Cause
Flow Test Description
Step 1: Check charging system
DTC Troubleshooting
4
Ground circuit check
1) Turn ignition switch to OFF position.
2) Check for proper connection to BCM connector at
terminals “G30-12” and “G32-1”.
3) If OK, then measure resistance between following
terminals.
• Between “G30-12” terminal of BCM connector and
vehicle body ground
• Between “G32-1” terminal of BCM connector and
vehicle body ground
Is each resistance 2
Ω
or less?
BCM power supply
circuit and ground circuit
are in good condition.
Repair ground circuit.
Step
Action
Yes
No
DTC detecting condition
Possible cause
Power voltage supplied from battery to BCM is
higher than 16V.
• Charging system malfunction
• BCM malfunction
Step
Action
Yes
No
1
Charging system operation check
1) Check generator for operation referring to “Generator
Test (Overcharged Battery Check): For Petrol Engine
Model in Section 1J” or “Generator Test (Overcharged
Battery Check): For Diesel Engine Model in Section 1J”.
Is it in good condition?
Substitute a known-
good BCM and recheck.
Repair charging system.
10B-19 Body Electrical Control System:
DTC B1141 / B1142 (No. 1141 / No. 1142): Outside Air Temperature (Ambient Temp.) Sensor Circuit
Malfunction
S6JB0AA204009
Wiring Diagram
DTC Detecting Condition and Possible Cause
Flow Test Description
Step 1: Check whether malfunction is in outside air temperature sensor.
Step 2: Check outside air temperature sensor circuit.
DTC Troubleshooting
7
8
9
10
11
12
13
14
15
6
5
4
3
2
1
G32
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
G30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
G31
WHT/BLK
BLK/RED
5V
G31-24
G31-21
1
2
2
3
1
I5JB0AA20007-01
1. Outside air temperature sensor
3. Outside air temperature sensor connector
2. BCM
DTC detecting condition
Possible cause
DTC B1141 (DTC No. 1141):
Input signal from outside air temperature sensor is higher
than 4.88 V.
• Open in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction
DTC B1142 (DTC No. 1142):
Input signal from outside air temperature sensor is lower
than 0.1 V.
• Short in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction
Step
Action
Yes
No
1
Outside air temperature sensor check
1) Turn ignition switch to OFF position.
2) Disconnect connector from outside air temperature
sensor.
3) Check outside air temperature sensor for resistance
referring to “Outside Air Temperature Sensor Inspection
(If Equipped) in Section 9C”.
Is it in good condition?
Go to Step 2.
Replace outside air
temperature sensor.
Body Electrical Control System: 10B-20
DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction
S6JB0AA204010
Wiring Diagram
DTC Detecting Condition and Possible Cause
Flow Test Description
Step 1: Check air bag communication circuit.
Step 2: Check air bag communication circuit.
2
Outside air temperature sensor circuit check
1) Disconnect connector from BCM and check for proper
terminal connection to BCM connector.
2) If connections are OK, check outside air temperature
sensor circuit for open, short and high resistance.
Is each circuit in good condition?
Substitute a known-
good BCM and recheck.
Repair circuit.
Step
Action
Yes
No
7
8
9
10
11
12
13
14
15
6
5
4
3
2
1
G32
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
G30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
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24
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30
31
32
33
34
35
36
37
38
39
40
G31
YEL
5V
G30-19
[A]: G47-22
[B]: G46-15
[A]
[B]
2
1
1
1
G46
G47
I5JB0AA20008-01
[A]: Vehicle not equipped with side-air bag
1. SDM
[B]: Vehicle equipped with side-air bag
2. BCM
DTC detecting condition
Possible cause
After ignition switch is turned on, abnormal signal is fed
from SDM to BCM.
• Air bag communication circuit open or short
• SDM malfunction
• BCM malfunction
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