Pinpoint Test Pg: Event Notification Signal (RCM To BCM): Notes

Refer to appropriate Supplemental Restraint System in OEM Wiring Diagrams article, for schematic and connector information.

Normal Operation and Fault Conditions

The RCM transmits an event notification signal which communicates fuel cutoff status and SRS deployment status to the BCM. When the BCM receives an event notification signal which indicates a crash, it initiates fuel cut-off.

The RCM monitors the event notification signal circuit for the following faults:

Short to voltage
Short to ground
Open circuit

If a fault is detected, the RCM stores DTC B11D8:11, B11D8:12 or B11D8:13 in memory. The airbag warning indicator does not illuminate if B11D8:11, B11D8:12 or B11D8:13 is set.

PPT P RCM DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
B11D8:12	Restraint Event Notification: Circuit Short to Battery	Sets when the RCM senses a short to voltage from the event notification signal circuit for more than 12 seconds.
B11D8:14	Restraint Event Notification: Circuit Short to Ground or Open	Sets when the RCM senses a short to ground or an open from the event notification signal circuit for more than 12 seconds.

Possible Causes

Wiring, terminals or connectors
BCM
RCM

WARNING: Incorrect repair techniques or actions can cause an accidental SRS deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.

NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.

NOTE: Always make sure the correct OCSM component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect OCSM component is installed, DTCs may set.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

Circuit	Pin
ENS_1 (Event Notification Signal 1) - CR115	51(BROWN)

Restraint Control Module-B (RCM-B) Connector - C310B

Circuit	Pin
ENS_1 (Event Notification Signal 1) - CR115	42(BROWN)