501-20B Supplemental Restraint System	2014 Fiesta
Diagnosis and Testing	Procedure revision date: 05/6/2013

Pinpoint Test - DTC: BB

U0154:00

Normal Operation and Fault Conditions

The RCM uses information contained in messages from the OCSM sent on the HS-CAN .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0154:00	Lost Communication with Restraints Occupant Classification System Module: No Sub Type Information	This DTC sets if the RCM does not receive an expected message from the OCSM .

Possible Causes

Network traffic
OCSM
RCM

PINPOINT TEST A : U0154:00

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 SRS 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 SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.

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

A1 CHECK THE COMMUNICATION NETWORK

WARNING: Before beginning any service procedure in this section, refer to Safety Warnings in section 100-00 General Information. Failure to follow this instruction may result in serious personal injury.

REFER to: Safety Belt and Supplemental Restraint System (SRS) Health and Safety Precautions (100-00 General Information, Description and Operation).

Ignition ON.

Using a diagnostic scan tool, carry out a network test.

Does the OCSM pass the network test?

Yes

GO to A2

No	To diagnose no communication with the OCSM , REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

A2 CHECK THE RCM (RESTRAINTS CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

Using a diagnostic scan tool, perform RCM self-test.

Using a diagnostic scan tool, clear RCM Diagnostic Trouble Codes (DTCs).

Wait 10 seconds.

Using a diagnostic scan tool, perform RCM self-test.

Is DTC U0154:00 retrieved again?

Yes

GO to A3

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

A3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST

Check the recorded Diagnostic Trouble Codes (DTCs) from the RCM self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes

REFER to: Pinpoint Test - DTC: FF (501-20B Supplemental Restraint System, Diagnosis and Testing).

GO to A4

A4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) SELF-TEST

Using a diagnostic scan tool, perform OCSM self-test.

Check for recorded Diagnostic Trouble Codes (DTCs) from the OCSM self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes

REFER to: Pinpoint Test - DTC: FF (501-20B Supplemental Restraint System, Diagnosis and Testing).

CHECK for any applicable Technical Service Bulletins (TSBs). If a exists for this concern, DISCONTINUE this test and FOLLOW instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
REPEAT the self-test. If U0154:00 returns, INSTALL a new sensor.
REFER to: Occupant Classification System (OCS) Sensor (501-20B Supplemental Restraint System, Removal and Installation).