10B-17 Body Electrical Control System:
DTC B1133 (DTC No. 1133): Battery Voltage Too High
S7RS0BA204008
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
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?
Go to Step 4. Repair power supply
circuit.
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
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 (included in
junction block
assembly) and recheck.
Repair charging system.
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