Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test F: The One-Touch Down Feature Is Inoperative

PINPOINT TEST F: THE ONE-TOUCH DOWN FEATURE IS INOPERATIVE


F1-F2:






F3-F5:






F6-F8:






Normal Operation
The front electronic module (FEM) supplies voltage to circuit 7S-AJ16 (YE/BK) to the driver window control switch. When the FEM detects a ground on circuit 7S-AJ16 (YE/BK), it supplies voltage and ground to the appropriate driver window motor circuits in order to accomplish the commanded one-touch down operation of the driver window.

DTC B1398 sets if the FEM senses an open, short to voltage, or a short to ground on circuit 7S-AJ16 (YE/BK).

Possible Causes
- circuit 7S-AJ16 (YE/BK) open, short to voltage, or short to ground
- driver window control switch
- FEM