Suzuki Grand Vitara JB416 / JB420. Manual — part 412
10B-14 Body Electrical Control System:
BCM Power Circuit and Ground Circuit Check
S5JB0AA204007
Wiring Diagram
Troubleshooting
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2
1
G32
24
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G30
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G31
IG1
BLK
BLK
G32-1
G30-12
+B
G32-5
RED/WHT
WHT/BLK G30-2
PPL/RED G30-1
3
2
1
I5JB0AA20006-01
1. BCM
3. Battery
2. Ignition switch
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 “G32-5”.
3) If OK, then measure voltage between “G32-5” 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-15
DTC B1133 (No. 1133): Battery Voltage Too High
S5JB0AA204008
Wiring Diagram
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
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G32
24
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G30
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G31
IG1
BLK
BLK
G32-1
G30-12
+B
G32-5
RED/WHT
WHT/BLK G30-2
PPL/RED G30-1
3
2
1
I5JB0AA20006-01
1. BCM
3. Battery
2. Ignition switch
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) in Section 1J”.
Is it in good condition?
Substitute a known-
good BCM and recheck.
Repair charging system.
10B-16 Body Electrical Control System:
DTC B1141 / B1142 / B1143 (No. 1141 / No. 1142/ No. 1143): Outside Air Temperature (Ambient Temp.)
Sensor Circuit Malfunction
S5JB0AA204009
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 input circuit.
Step 3: Check outside air temperature sensor ground circuit (for DTC B1141 and B1143).
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G32
24
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G30
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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
DTC B1143 (DTC No. 1143):
Input signal from outside air temperature sensor is 0.1 -
0.27 V or 4.6 - 4.88 V.
• High resistance in outside air temperature sensor
circuit
• Outside air temperature sensor malfunction
• BCM malfunction
Body Electrical Control System: 10B-17
DTC troubleshooting
DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction
S5JB0AA204010
Wiring Diagram
Step
Action
Yes
No
1
Check outside air temperature sensor
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.
2
Check outside air temperature sensor circuit
1) Turn ignition switch to ON position.
2) Measure voltage between “WHT/BLK” terminal of
outside air temperature sensor connector and vehicle
body ground.
Is voltage 4 – 6 V?
Go to Step 3.
Open or short in “WHT/
BLK” circuit. If OK,
substitute a known-
good BCM and recheck.
3
Check outside air temperature sensor circuit
1) Turn ignition switch to OFF position.
2) Check for proper connection to “G31-21” terminal of
BCM connector.
3) If OK, measure resistance between “BLK/RED” terminal
of outside air temperature sensor connector and vehicle
body ground.
Is resistance 1
Ω
or less?
Substitute a known-
good BCM and recheck.
Open or high resistance
in “BLK/RED” circuit.
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G32
24
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G30
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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
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