G272 SUZUKI SX4 2006 1.G Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 10B-17 Body Electrical Control System:
DTC B1133 (DTC No. 1133): Battery Voltage Too HighS6RW0DA204008
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 Troubleshooting4Ground circuit check
1) Turn ignition switch to OFF position.
2) Check for proper connection to junction block connector
at terminals “G271-3”, “G272-9” and “L314-4”.
3) If OK, then measure resistance between following
terminals.
• Between “G271-3” terminal of junction block
connector and vehicle body ground
• Between “G272-9” terminal of junction block
connector and vehicle body ground
• Between “L314-4” terminal of junction block 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
1Charging 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) and
recheck.Repair charging system.

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-24
Junction block connector “E324”
Junction block connector “E325”
Junction block connector “G271”
Junction block connector “G272”
Junction block connector “G273”
Junction block connector “L312”
Junction block connector “L313”Terminal Circuit Normal voltage Condition
E324-2 Backup power source 10 – 14 V Ignition switch is at all positions
Terminal Circuit Normal voltage Condition
E325-3 Horn10 – 14 V Horn switch is at ON position
0 V Horn switch is at OFF position
Terminal Circuit Normal voltage Condition
G271-3 Ground for BCM 0 V Ignition switch is at all positions
G271-7Rear end door window
defogger indicator light10 – 14 VEngine is running and rear end door window
defogger indicator light is lit up
0 VEngine is running and rear end door window
defogger indicator light is not lit up
Terminal Circuit Normal voltage Condition
G272-3 Horn switch10 – 14 V Horn switch is not pushed
0 V Horn switch is pushed
G272-7 Lighting switch10 – 14 VEngine is running (with DRL model) or lighting
switch is at any position other than OFF
position
0 V Lighting switch is at OFF position
G272-9 Ground for BCM 0 V Ignition switch is at all positions
G272-11 Hazard warning switch10 – 14 V Hazard warning switch is at OFF position
0 VHazard warning switch is at ON position or
lock or unlock button of keyless entry
transmitter (answer back control) is pushed
Terminal Circuit Normal voltage Condition
G273-2 Power source (IG)10 – 14 V Ignition switch is at ON position
0 VIgnition switch is at any position other than
ON position
G273-5 Power source (ACC)10 – 14 V Ignition switch is at ACC or ON position
0 VIgnition switch is at any position other than
ACC or ON position
Terminal Circuit Normal voltage Condition
L312-4Power supply for rear wiper
motor10 – 14 VIgnition switch is at ON position
L312-5 Interior light10 – 14 VInterior light switch is at DOOR position and
interior light is not lit up
0 VInterior light switch is at DOOR position and
interior light is lit up
Terminal Circuit Normal voltage Condition
L313-2 Air bag communication line*0 – 1 V
↑↓
4 – 6 VRefer to “Reference waveform No. 10: ”
L313-3Serial communication line of
data link connector for SDM7 – 12 V Ignition switch is at ON position