Dtc B1133 (Dtc No. 1133): Battery Voltage Too High - Suzuki GRAND VITARA Owner's Manual

Step
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

DTC B1133 (DTC No. 1133): Battery Voltage Too High

Wiring Diagram
G30
12 11 10 9 8 7 6
24 23 22 21 20 19 18 17
G32
6 5 4 3 2
15 14 13 12 11 10 9
DTC Detecting Condition and Possible cause
DTC detecting condition
Power voltage supplied from battery to BCM is
higher than 16V.
Flow Test Description
Step 1: Check charging system
DTC troubleshooting
Step
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?
Action
Ω
or less?
+B
2
3
5 4 3 2 1
16 15 14 13
1
8 7
1. BCM
2. Ignition switch
• Charging system malfunction
• BCM malfunction
Action
Body Electrical Control System:
BCM power supply
circuit and ground circuit
are in good condition.
1
G32-5
RED/WHT
WHT/BLK G30-2
PPL/RED G30-1
G32-1
BLK
BLK G30-12
20 19 18 17 16 15
40 39 38 37 36 35
3. Battery
Possible cause
Substitute a known-
good BCM and recheck.
Yes
Repair ground circuit.
IG1
G31
14 13 12 11 10 9 8 7 6 5 4 3
34 33 32 31 30 29 28 27 26 25 24 23
Yes
Repair charging system.
10B-15
No
S5JB0AA204008
2 1
22 21
I5JB0AA20006-01
No