Normal Operation
WARNING: This page is about a different car, the 2013 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The Occupant Classification System Module (OCSM) monitors the Belt Tension Sensor (BTS) VREF circuit for faults. If the OCSM detects a fault, it stores DTC U200E:11, U200E:12 or U200E:1A in memory and sends a message to the Restraints Control Module (RCM).
The RCM stores DTC B00A0:09 memory and sends a message to the Instrument Panel Cluster (IPC) to illuminate the air bag warning indicator.
- DTC U200E:11 (Control Module Output Power B: Circuit Short to Ground) - A fault is indicated when the OCSM senses a short to a ground on the BTS VREF circuit. If an open circuit is present on the BTS signal circuit (such as if the BTS connector is disconnected) at the same time that the BTS VREF circuit is shorted to ground, only DTC B1A59:11 will be retrieved.
- DTC U200E:12 (Control Module Output Power B: Circuit Short to Battery) - A fault is indicated when the OCSM senses a short to voltage on the BTS VREF circuit.
- DTC U200E:1A (Control Module Output Power B: Circuit Resistance Below Threshold) - A fault is indicated when the OCSM senses that the BTS VREF circuit is shorted to the weight sensor VREF circuit(s). DTC B0061:12 and/or B1A59:01 may also set when this fault is present.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- BTS (part of front passenger safety belt retractor)
- OCSM