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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System >> Diagnosis And Testing >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test L: Lamp Fault Code (LFC) 19/21 DTC B2293 >> Normal Operation

Normal Operation

The Restraints Control Module (RCM) continuously monitors all front air bag module circuits (loop) for the following faults:

If a fault is detected, the RCM  will store DTC B2293 in memory and send a message to the Instrument Cluster (IC) module to flash a Lamp Fault Code (LFC) 19 or 21 on the air bag warning indicator. After the LFCs  are displayed, the air bag warning indicator will remain illuminated for the rest of the ignition cycle.

The RCM  monitors all front air bag module circuits for resistance and expects a normal resistance for the driver air bag module loops between 1.84 and 3.96 ohms. The normal expected resistance for the passenger air bag module loops is between 1.50 and 3.04 ohms.

If a resistance for the driver air bag loop 1 or 2 is between 1.36 and 1.84 ohms or between 3.96 and 4.70 ohms, there exists a strong potential for a fault to occur (a DTC may or may not set). The RCM  will also set a DTC if the loop resistance is less than 1.36 ohms or greater than 4.70 ohms.

If a loop resistance for the passenger air bag loops 1 and 2 is between 1.04 and 1.50 ohms or between 3.04 and 3.72 ohms, there exists a strong potential for a fault to occur, a DTC may or may not set. The RCM  will also set a DTC if the loop resistance is less than 1.04 ohms or greater than 3.72 ohms.

FAULT DESCRIPTION

Fault PIDs (1) Description Fault Trigger Condition
2293_16_OD and 2293_16_CM Air Bag Inflator Circuit Resistance Low - Loop No. 2, Front Passenger Side When the Restraints Control Module (RCM) measures less than 1.04 ohms between the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_17_OD and 2293_17_CM Air Bag Circuit Open - Loop No. 2, Front Passenger Side When the RCM  measures greater than 3.72 ohms between the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_18_OD and 2293_18_CM Air Bag Circuit Short to Battery - Loop No. 2, Front Passenger Side When the RCM  senses a short to voltage on either of the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_19_OD and 2293_19_CM Air Bag Circuit Short to Ground - Loop No. 2, Front Passenger Side When the RCM  senses a short to ground on either of the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_20_OD and 2293_20_CM Air Bag Inflator Circuit Resistance Low - Loop No. 2, Front Driver Side When the RCM  measures less than 1.36 ohms between the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_21_OD and 2293_21_CM Air Bag Circuit Open - Loop No. 2, Front Driver Side When the RCM  measures greater than 4.70 ohms between the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_22_OD and 2293_22_CM Air Bag Circuit Short to Battery - Loop No. 2, Front Driver Side When the RCM  senses a short to voltage on either of the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_23_OD and 2293_23_CM Air Bag Circuit Short to Ground - Loop No. 2, Front Driver Side When the RCM  senses a short to ground on either of the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_24_OD and 2293_24_CM Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side When the RCM  measures less than 1.04 ohms between the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_25_OD and 2293_25_CM Air Bag Circuit Open - Loop No. 1, Front Passenger Side When the RCM  measures greater than 3.72 ohms between the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_26_OD and 2293_26_CM Air Bag Circuit Short to Battery - Loop No. 1, Front Passenger Side When the RCM  senses a short to voltage on either of the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_27_OD and 2293_27_CM Air Bag Circuit Short to Ground - Loop No. 1, Front Passenger Side When the RCM  senses a short to ground on either of the passenger air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_28_OD and 2293_28_CM Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side When the RCM  measures less than 1.36 ohms between the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_29_OD and 2293_29_CM Air Bag Circuit Open - Loop No. 1, Front Driver Side When the RCM  measures greater than 4.70 ohms between the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_30_OD and 2293_30_CM Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side When the RCM  senses a short to voltage on either of the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
2293_31_OD and 2293_31_CM Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side When the RCM  senses a short to ground on either of the driver air bag loop circuits for greater than 2.2 seconds, a fault will be indicated.
(1) Fault PIDs that end in OD indicate an on-demand status and are associated with on-demand DTC B2293. Fault PIDs that end in CM indicate continuous memory status and are associated with continuous DTC B2293.

This pinpoint test is intended to diagnose the following: 

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