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DTC B1133 (DTC No.1133): Battery Voltage Too High
Wiring Diagram
[A]: Junction block assembly connector viewed from harness side
1. BCM
2. Junction block assembly
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?
• Charging system malfunction
• BCM malfunction
Action
Body Electrical Control System:
3. Ignition switch
4. Battery
Possible cause
Yes
Substitute a known
good BCM (included in
junction block
assembly) and recheck.
10B-17
S4RS0AA204021
I4RS0AA20008-
No
Repair charging system.
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