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 W

PINPOINT TEST W: LFC 35/DTC B1935 - PASSENGER AIR BAG CIRCUIT RESISTANCE LOW


Test W1-W3:






Test W3-W4:






Test W5:






Normal Operation
The restraints control module (RCM) monitors the resistance of the passenger air bag ignitor by measuring the resistance between pins 6 and 7. If the RCM detects low resistance between these pins, it will store a diagnostic trouble code (DTC) B1935 in memory and flash a lamp fault code (LFC) 35 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
Passenger air bag low resistance can be caused by:
- a short in the wiring harness.
- a low resistance in the passenger air bag module.
- a closed shorting bar.
- a damaged camming beam.
- an RCM internal concern.
- an incorrectly configured RCM.