Mazda CX-7 2007 Workshop Manual page 1218

DTC B1317, B1318
B1317 SAS control module power supply voltage increases (16.1 V or more)
DTC
B1318 SAS control module power supply voltage decreases (less than 8 V)
Warning
• Detection conditions are for understanding the DTC outline before performing an inspection.
Performing an inspection according to only the detection conditions may cause injury due to
DETECTION
an operating error, or damage the system. When performing an inspection, always follow the
CONDITION
inspection procedure.
• When the SAS control module power supply voltage is not within 816 V.
• Open or short circuit in wiring harness between battery and SAS control module
• ARS 7.5 A fuse malfunction
POSSIBLE
• Battery malfunction
CAUSE
• SAS control module malfunction
SAS CONTROL MODULE WIRING
HARNESS-SIDE CONNECTOR
1V 1S
1P
1W
1T 1Q
1X 1U 1R
Diagnostic procedure
STEP
1 INSPECT FUSE
• Remove the ARS 7.5 A fuse.
• Is the fuse normal?
2 INSPECT BATTERY
• Measure the battery positive voltage.
• Is the voltage 8 V16 V?
3 INSPECT WIRING HARNESS BETWEEN
BATTERY AND FUSE BLOCK
• Turn the ignition switch to the ON position.
• Measure the fuse block terminal Y voltage.
• Is the voltage 8 V16 V?
08-02–16
ON-BOARD DIAGNOSTIC
1D
1M 1J 1G 1A
1H 1E 1B
1I
1F 1C
INSPECTION
FUSE BLOCK
AK AC U M
AL AD V N
AE W O
AM
AF X P
AN
AG Y Q
AO
AH Z R
AP
AI AA S
AQ
AR AJ AB T
Yes Install the fuse, then go to the next step.
No Replace the fuse.
Yes Go to the next step.
No Battery is malfunctioning
Inspect the charge/discharge system.
Yes Install the fuse, then go to the next step.
No Repair the wiring harness between the battery and fuse
block.
id080200811500
A
B
I C
J D
K E
L F
G
H
ACTION