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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 D: Lamp Fault Code (LFC) 38/39 DTC B1085 >> Normal Operation

Normal Operation

The Restraints Control Module (RCM) continuously monitors the safety belt retractor adaptive load limiting circuits for the following faults:

If a fault is detected, the RCM  will set and store DTC B1085 in memory and send a message to the Instrument Cluster (IC) module to flash a Lamp Fault Code (LFC) 38 or 39 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 the safety belt adaptive load limiting retractor 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 loop resistance is less than 1.04 ohms or greater than 3.72 ohms.

FAULT DESCRIPTION

Fault PIDs (1) Description Fault Trigger Condition
1085_24_OD and 1085_24_CM Seatbelt Load Limiter Front Passenger Circuit Resist Low on Squib When the Restraints Control Module (RCM) measures less than 1.04 ohms between the passenger safety belt load limiting retractor circuits, a fault will be indicated.
1085_25_OD and 1085_25_CM Seatbelt Load Limiter Front Passenger Open When the RCM  measures greater than 3.72 ohms between the passenger safety belt load limiting retractor circuits, a fault will be indicated.
1085_26_OD and 1085_26_CM Seatbelt Load Limiter Front Passenger Short to Battery When the RCM  senses a short to voltage on either passenger safety belt load limiting retractor circuit, a fault will be indicated.
1085_27_OD and 1085_27_CM Seatbelt Load Limiter Front Passenger Short to Ground When the RCM  senses a short to ground on either passenger safety belt load limiting retractor circuit, a fault will be indicated.
1085_28_OD and 1085_28_CM Seatbelt Load Limiter Front Driver Circuit Resist Low on Squib When the RCM  measures less than 1.04 ohms between the driver safety belt load limiting retractor circuits, a fault will be indicated.
1085_29_OD and 1085_29_CM Seatbelt Load Limiter Front Driver Open When the RCM  measures greater than 3.72 ohms between the driver safety belt load limiting retractor circuits, a fault will be indicated.
1085_30_OD and 1085_30_CM Seatbelt Load Limiter Front Driver Short to Battery When the RCM  senses a short to voltage on either driver safety belt load limiting retractor circuit, a fault will be indicated.
1085_31_OD and 1085_31_CM Seatbelt Load Limiter Front Driver Short to Ground When the RCM  senses a short to ground on either driver safety belt load limiting retractor circuit, a fault will be indicated.
(1) Fault PIDs that end in OD indicate an on-demand status and are associated with on-demand DTC B1085. Fault PIDs that end in CM indicate continuous memory status and are associated with continuous DTC B1085.

This pinpoint test is intended to diagnose the following: 

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