Battery power supply voltage increases (17.5 V or more)
B1318
Battery power supply voltage decreases (less than 7.5 V)
DETECTION CONDITION
• If the power retractable hardtop control module power supply voltage is not within 7.5-17.5 V.
Note
• The system recovery condition after detecting DTC B1317/1318 is that the battery voltage is in the 8.5-16.5 V range. Verify that the battery voltage is 8.5-16.5 V when inspecting.
POSSIBLE CAUSE
• Open or short circuit in wiring harness between battery and power retractable hardtop control module
• ROOM 15 A fuse malfunction
• Power retractable hardtop control module malfunction
• Battery malfunction
Diagnostic procedure
STEP
INSPECTION
ACTION
1
INSPECT THE FUSE
• Remove the ROOM 15 A fuse.
• Is the fuse normal?
Yes
Go to the next step.
No
Replace the fuse.
2
INSPECT THE BATTERY
• Measure the battery positive voltage.
• Is the voltage 8.5 V-16.5 V?
Yes
Go to the next step.
No
The battery has a malfunction. Inspect the charge/discharge system.
3
INSPECT WIRING HARNESS BETWEEN BATTERY AND POWER RETRACTABLE HARDTOP CONTROL MODULE
• Turn the ignition switch to the ON position.
• Measure the power retractable hardtop control module terminal 1X voltage.
• Is the voltage 8.5 V-16.5 V?
Yes
Replace the power retractable hardtop control module.
