501-20B Supplemental Restraint System	2013 - 2014 MKZ
Diagnosis and Testing	Procedure revision date: 07/9/2013

Pinpoint Test - DTC: UU

U024C:00

Normal Operation and Fault Conditions

The OCSM uses information contained in messages from the SCMH sent on the High Speed Controller Area Network 2 (HS2-CAN).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U024C:00	Lost Communication with Seat Control Module "H": No Sub Type Information	This DTC sets if the OCSM does not receive an expected message from the SCMH .

Possible Sources

Network traffic
OCSM
SCMH

PINPOINT TEST A : U024C: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: SRS components should only be disconnected or reconnected 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.

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 SCMH pass the network test?

Yes

GO to A2

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

A2 CHECK THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

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

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

Wait 10 seconds.

Using a diagnostic scan tool, perform OCSM self-test and record any Diagnostic Trouble Codes (DTCs) that are retrieved.

Is DTC U024C: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 OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) SELF-TEST

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

Is DTC U3003:16 or U3003:17 recorded?

Yes

REFER to: Pinpoint Test - DTC: NN (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: Driver Multi-Contour Seat Module [SCMG] - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).

CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test.
If U024C:00 returns, INSTALL a new .
REFER to: Occupant Classification System (OCS) Sensor - Vehicles With: Multi-Contour Seats (501-20B Supplemental Restraint System, Removal and Installation).