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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 K: Lamp Fault Code (LFC) 33/34 DTC B2292 >> Normal Operation

Normal Operation

The Restraints Control Module (RCM) continuously monitors the safety belt buckle pretensioner circuits for the following faults:

If a fault is detected, the RCM  will set and store DTC B2292 in memory and send a message to the Instrument Cluster (IC) module to flash a Lamp Fault Code (LFC) 33 or 34 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 safety belt buckle pretensioner circuits for resistance and expects a normal resistance between 1.50 and 3.04 ohms.

If resistance 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
2292_24_OD and 2292_24_CM Pretensioner Circuit Short to Ground, Front Passenger Side When the Restraints Control Module (RCM) senses a short to ground on either of the passenger pretensioner circuits for greater than 2.2 seconds, a fault will be indicated.
2292_25_OD and 2292_25_CM Pretensioner Circuit Short to Battery, Front Passenger Side When the RCM  senses a short to voltage on either of the passenger pretensioner circuits for greater than 2.2 seconds, a fault will be indicated.
2292_26_OD and 2292_26_CM Pretensioner Circuit Open, Front Passenger Side When the RCM  measures greater than 3.72 ohms between the passenger pretensioner circuits for greater than 2.2 seconds, a fault will be indicated.
2292_27_OD and 2292_27_CM Pretensioner Circuit Resistance Low, Front Passenger Side When the RCM  measures less than 1.04 ohms between the passenger pretensioner circuits for greater than 2.2 seconds, a fault will be indicated.
2292_28_OD and 2292_28_CM Pretensioner Circuit Short to Ground, Front Driver Side When the RCM  senses a short to ground on either of the driver pretensioner circuits for greater than 2.2 seconds, a fault will be indicated.
2292_29_OD and 2292_29_CM Pretensioner Circuit Short to Battery, Front Driver Side When the RCM  senses a short to voltage on either of the driver pretensioner circuits for greater than 2.2 seconds, a fault will be indicated.
2292_30_OD and 2292_30_CM Pretensioner Circuit Open, Front Driver Side When the RCM  measures greater than 3.72 ohms between the driver pretensioner circuits for greater than 2.2 seconds, a fault will be indicated.
2292_31_OD and 2292_31_CM Pretensioner Circuit Resistance Low, Front Driver Side When the RCM  measures less than 1.04 ohms between the driver pretensioner 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 B2292. Fault PIDs that end in CM indicate continuous memory status and are associated with continuous DTC B2292.

This pinpoint test is intended to diagnose the following: 

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