H7 VERIFY THE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) PROVES OUT SUCCESSFULLY
REFER to: Supplemental Restraint System (SRS) Repowering (501-20B Supplemental Restraint System, General Procedures).
Did the SRS prove out successfully?
Yes | Repair is complete. RETURN the vehicle to the customer. |
|---|---|
No | REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). |
DTC: U0140
Refer to Wiring Diagrams Cell 14 for schematic and connector information.
Normal Operation and Fault Conditions
The DSM and the BCM communicate using the MS-CAN.
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
U0140 Lost Communication With Body Control Module (GEM ) | Set by the DSM whenever it has lost communication to the BCM for 15 seconds or longer while DSM input is between 10 and 15 volts. |
Possible Causes
Module communication DSM BCM
PINPOINT TEST I : DTC: U0140
I1 VERIFY CUSTOMER CONCERN
Ignition ON. Verify there is an observable symptom present.
Is an observable symptom present?
Yes | GO to I2 |
|---|---|
No | The system is operating normally at this time. The DTC may have been set due to high network traffic or intermittent fault condition. |
I2 CHECK THE COMMUNICATION NETWORK
Ignition ON. Using a diagnostic scan tool, perform the network test.
Does the DSM pass the network test?
Yes | GO to I3 |
|---|---|
No | REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing). |
I3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE SELF-TEST
Check for recorded DSM Diagnostic Trouble Codes (DTCs) from the self-test.
Is DTC B1317 or B1318 recorded?
Yes | For DTC B1317, GO to Pinpoint Test G For DTC B1318, GO to Pinpoint Test H |
|---|---|
No | GO to I4 |
I4 RECHECK THE DSM (DRIVER FRONT SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.