Suzuki Swift Sport 2004 Service & Repair Manual page 1420

10B-17 Body Electrical Control System:
Step
3 Power supply circuit check
1) Check for proper connection to junction block assembly
connector at terminals "G32-2" and "G32-5".
2) If OK, turn ignition switch ON.
3) Measure voltage between following terminals.
• Between "G32-2" terminal of junction block assembly
connector and vehicle body ground
• Between "G32-5" terminal of junction block assembly
connector and vehicle body ground
Is each voltage 10 – 14 V?
4 Ground circuit check
1) Turn ignition switch to OFF position.
2) Check for proper connection to junction block assembly
connector at terminals "G33-3", "G34-9" and "L05-4".
3) If OK, then measure resistance between following
terminals.
• Between "G33-3" terminal of junction block assembly
connector and vehicle body ground
• Between "G34-9" terminal of junction block assembly
connector and vehicle body ground
• Between "L05-4" terminal of junction block assembly
connector and vehicle body ground
Is each resistance 2
DTC B1133 (DTC No. 1133): Battery Voltage Too High
Wiring Diagram
Refer to "BCM Power Circuit and Ground Circuit Check".
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?
• Charging system malfunction
• BCM malfunction
Action
Yes
Go to Step 4.
BCM power supply
circuit and ground circuit
are in good condition.
Possible cause
Yes
Substitute a known
good BCM (included in
junction block
assembly) and recheck.
No
Repair power supply
circuit.
Repair ground circuit.
S7RS0BA204008
No
Repair charging system.