Pinpoint Test Ah: DTC B111C

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When taking measurements at Dual Climate Controlled Seat Module (DCSM) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in Diagnostic Trouble Codes (DTCs) and system failure. Touching the tip of these connector pins is recommended instead.

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

AH1 CHECK THE TED CIRCUITS FOR AN OPEN

Ignition OFF.
Depower the SRS . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
Disconnect: Passenger Seat Side Air Bag C327.
Disconnect: DCSM C3036a.
Disconnect: Cushion TED C3328.
Disconnect: Backrest TED C3326.

WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.

Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .

Measure the resistance of the following circuits.

CONNECTOR PIN AND CIRCUIT REFERENCE CHART

DCSM Connector-Pin	Circuit	TED Connector-Pin
C3036a-A	CHS07 (GY/BU)	C3328-1
C3036a-B	RHS07 (BU)	C3328-3
C3036a-C	CHS06 (BU/BN)	C3326-1
C3036a-D	RHS06 (WH)	C3326-3

Are the resistances less than 5 ohms?

Yes: GO to AH2 .
No: REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.
DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C327.

REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

AH2 CHECK THE TED CIRCUITS FOR A SHORT TO VOLTAGE

Ignition ON.

Measure the voltage between the following DCSM C3036a pins, harness side and ground.

CONNECTOR PIN AND CIRCUIT REFERENCE CHART

Connector-Pin	Circuit
C3036a-A	CHS07 (GY/BU)
C3036a-B	RHS07 (BU)
C3036a-C	CHS06 (BU/BN)
C3036a-D	RHS06 (WH)

Is voltage present on any circuits?

Yes: REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.
DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C327.

REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
No: GO to AH3 .

AH3 CHECK THE RESISTANCE OF THE TEDs
- Ignition OFF.
- Measure the resistance between backrest TED C3326 pin 1 and pin 3, component side and between cushion TED C3328 pin 1 and pin 3, component side.
  
  Fig 1: Measuring Resistance Between Backrest TED C3322 Pin 1 And Pin 3, Component Side
  Courtesy of FORD MOTOR CO.
- Are the resistances between 0.9 and 10 ohms?
- Yes: INSTALL a new DCSM . REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) . REPEAT the self-test. CLEAR the DTCs.
  DISCONNECT the battery ground cable.
  
  CONNECT passenger seat side air bag module C327.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- No: If the resistance of the backrest TED was not between 0.9 and 10 ohms, INSTALL a new backrest TED . REFER to SEAT BACKREST THERMO-ELECTRIC DEVICE . REPEAT the self-test. CLEAR the DTCs.
  If the resistance of the cushion TED was not between 0.9 and 10 ohms, INSTALL a new cushion TED . REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE . REPEAT the self-test. CLEAR the DTCs.
  
  DISCONNECT the battery ground cable.
  
  CONNECT passenger seat side air bag module C327.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .