5. Check for additional DTCs
Refer to continuous DTCs recorded in step 1 . If any continuous DTCs were retrieved, go to diagnostic
trouble code identification table for direction to appropriate test. See DIAGNOSTIC TROUBLE CODE
(DTC) IDENTIFICATION table. DO NOT clear any DTCs until all DTCs have been resolved. If no
continuous DTCs were retrieved, reconnect air bag system. Activate air bag system. See ACTIVATING
SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Clear all DTCs. See CLEARING
FAULT CODES under DIAGNOSTICS.
TEST V: DRIVER AIR BAG CIRCUIT RESISTANCE LOW (DTC B1934)
Description
Restraints Control Module (RCM) monitors resistance of driver-side air bag ignitor by measuring resistance
between RCM connector terminals No. 3 (Gray/Orange wire) and No. 4 (Gray/White wire). If RCM detects low
resistance between these terminals, it will store Diagnostic Trouble Code (DTC) B1934 in memory and flash
Code 34 on AIR BAG warning light.
Possible Causes
Driver-side air bag low resistance could be caused by short circuit in clockspring windings, short circuit in
wiring harness, low resistance in driver-side air bag module, closed shorting bar, damaged camming beam or
faulty RCM.
1. Check for hard or intermittent DTC
Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). See USING
SCAN TOOL under DIAGNOSTICS. Turn ignition switch to RUN position. Retrieve and record any
continuous DTCs. See RETRIEVING FAULT CODES under DIAGNOSTICS. Perform on-demand
self-test. See ON-DEMAND SELF-TEST under DIAGNOSTICS. If DTC B1934 was retrieved during
on-demand self-test, fault is hard. Go to next step. If DTC B1934 was not retrieved, fault is intermittent.
Go to step 5 .
2. Check driver-side air bag module
Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM under
DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition switch to RUN position. Perform on-
demand self-test. See ON-DEMAND SELF-TEST under DIAGNOSTICS. If DTC B1934 is retrieved,
go to next step. If DTC B1934 is not retrieved, replace driver-side air bag module. See DRIVER-SIDE
AIR BAG MODULE under REMOVAL & INSTALLATION. Go to step 6 .
NOTE:
Before proceeding, see AIR BAG SAFETY PRECAUTIONS .
NOTE:
By disconnecting RCM harness connector, circuits No. 614 (Gray/Orange
wire) and No. 615 (Gray/White wire) are shorted together by shorting bar.
Do not remove shorting bar.
2003 Ford Pickup F150
2003 ACCESSORIES/SAFETY EQUIPMENT Air Bag Restraint Systems - F150 Pickup