Suzuki Grand Vitara JB627. Manual — part 417
10B-17 Body Electrical Control System:
DTC B1133 (No. 1133): Battery Voltage Too High
S6JB0BA204008
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) in Section 1J”.
Is it in good condition?
Substitute a known-
good BCM and recheck.
Repair charging system.
Body Electrical Control System: 10B-18
DTC B1141 / B1142 (No. 1141 / No. 1142): Outside Air Temperature (Ambient Temp.) Sensor Circuit
Malfunction
S6JB0BA204009
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.
7
8
9
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12
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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
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11
12
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32
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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
10B-19 Body Electrical Control System:
DTC troubleshooting
DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction
S6JB0BA204010
Wiring Diagram
DTC Detecting Condition and Possible Cause
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
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.
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
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11
12
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15
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G30
1
2
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5
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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
Body Electrical Control System: 10B-20
Flow Test Description
Step 1: Check air bag communication circuit.
Step 2: Check air bag communication circuit.
DTC Troubleshooting
DTC B1157 (No. 1157): Air Bag Deployment Signal Input
S6JB0BA204011
Wiring Diagram
Refer to “DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction”.
DTC Detecting Condition and Possible cause
Flow Test Description
Step 1: Check DTC for SDM.
DTC troubleshooting
DTC B1170 (No. 1170): EEPROM access error
S6JB0BA204012
DTC Detecting Condition and Possible Cause
DTC Troubleshooting
NOTE
Before performing steps below, be sure to perform “Body Electrical Control System Check”.
1) Ignition switch OFF.
2) Replace BCM.
Step
Action
Yes
No
1
Air bag communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connector from SDM referring to “SDM
Removal and Installation in Section 8B”.
3) Disconnect connector from BCM.
4) Check air bag communication circuit for open, short and
high resistance.
Is circuit in good condition?
Go to Step 2.
Repair circuit.
2
Air bag communication circuit check
1) Turn ignition switch to OFF position.
2) Connect connectors to BCM.
3) Turn ignition switch to ON position.
4) Measure voltage between “G30-19” terminal of BCM
connector and vehicle body ground.
Is voltage 4 – 6 V?
Substitute a known-
good SDM and recheck.
Substitute a known-
good BCM and recheck.
DTC detecting condition
Possible cause
Air bag deployment signal is fed from SDM to BCM.
• Air bag component parts
• BCM malfunction
Step
Action
Yes
No
1
Check DTC for SDM
1) Check DTC stored in SDM referring to “DTC Check in
Is DTC B1021 detected?
Go to “DTC B1021: Air
Bag Module Deployed
in Section 8B”.
Substitute a known-
good BCM and recheck.
DTC detecting condition
Possible cause
Data write error or check sum error.
BCM malfunction
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