Ford F150 Pickup. Instruction — part 1725

Fig. 14: Identifying Restraints Control Module (RCM) Connector
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 ACCESSORIES/SAFETY EQUIPMENT Air Bag Restraint Systems - F150 Pickup

Fig. 15: Identifying RCM Connector Camming Beams & Shorting Bars
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 ACCESSORIES/SAFETY EQUIPMENT Air Bag Restraint Systems - F150 Pickup

Fig. 16: Identifying Instrument Cluster Connector C220A
Courtesy of FORD MOTOR CO.

TEST B: AIR BAG WARNING LIGHT INOPERATIVE (DTC B1869)

Description

AIR BAG warning light is designed to illuminate for 6 seconds when ignition switch is turned to RUN position.
The initial 6 second illumination is normal and is call prove-out. The AIR BAG warning light is then used to
warn vehicle operator that there is a fault in the air bag system.

NOTE:

Before proceeding, see AIR BAG SAFETY PRECAUTIONS .

2003 Ford Pickup F150

2003 ACCESSORIES/SAFETY EQUIPMENT Air Bag Restraint Systems - F150 Pickup

Restraint Control Module (RCM) monitors AIR BAG warning light for open and short to ground conditions. If
RCM detects an open or short to ground in AIR BAG warning light circuit, it will store Diagnostic Trouble
Code (DTC) 1869 in memory. If RCM detects AIR BAG warning light failure in addition to another air bag
system failure, it will send a signal to the Generic Electronic Module (GEM) to produce 5 sets of 5 tone bursts.

Possible Causes

An AIR BAG warning light inoperative condition could be caused by damaged Black/Yellow wire, damaged or
burned out AIR BAG warning light bulb, instrument cluster malfunction 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 B1869 was retrieved during
on-demand self-test, fault is hard. Go to next step. If DTC B1869 was not retrieved, fault is intermittent.
Go to step 6 .

2. Check RCM

Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM under
DISABLING & ACTIVATING AIR BAG SYSTEM. Access RCM and disconnect harness connector.
See RESTRAINTS CONTROL MODULE (RCM) under REMOVAL & INSTALLATION. Measure
resistance between chassis ground and component side of RCM connector pin No. 20. See Fig. 17 . If
resistance is more than 10 ohms, go to next step. If resistance is less than 10 ohms, replace RCM. Go to
step 7 .

3. Check circuit for short to ground

Ensure ignition is off. Access and disconnect instrument cluster connector C220A. See INSTRUMENT
CLUSTER under REMOVAL & INSTALLATION. Measure resistance between ground and instrument
cluster connector C220A, terminal No. 13 (Black/Yellow wire, circuit No. 608). See Fig. 16 . If
resistance is less than 100 ohms, repair short to ground in Black/Yellow wire. See WIRING
DIAGRAMS . Go to step 7 . If resistance is more than 100 ohms, go to next step.

4. Check circuit for open

Disconnect RCM harness connector. Measure resistance between ground and instrument cluster
connector C220A, terminal No. 13 (Black/Yellow wire). If resistance is more than 10 ohms, repair open
in Black/Yellow wire. Go to step 7 . If resistance is less than 10 ohms, go to next step.

5. Check instrument cluster

Turn ignition switch to RUN position. Connect fused jumper wire between ground and component side of
instrument cluster connector C220A, terminal No. 13. If AIR BAG warning light illuminates, replace
RCM. Go to step 7 . If AIR BAG warning light does not illuminate, repair instrument cluster as

2003 Ford Pickup F150

2003 ACCESSORIES/SAFETY EQUIPMENT Air Bag Restraint Systems - F150 Pickup