PINPOINT TEST W: DTCs B103B AND B1111

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: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .

NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.

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

W1 CHECK TED CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
Disconnect: Driver Seat Side Air Bag C327.
Disconnect: Passenger Seat Side Air Bag Module C313.
Disconnect: DCSM C3305A.

Measure the resistance between DCSM C3305A, harness side and ground using the following chart:

Connector	Circuit
C3305A-G	CHS02 (YE/BU)
C3305A-H	RHS02 (BU/OG)
C3305A-J	CHS01 (GY/VT)
C3305A-K	RHS01 (WH/VT)

Fig 1: Measuring Resistance Between DCSM C3305A, Harness Side And Ground

Courtesy of FORD MOTOR CO.

Are the resistances greater than 10, 000 ohms?
- Yes: GO to W2.
- No: If the resistance of C3305A-G, circuit CHS02 (YE/BU) and/or C3305A-H, circuit RHS02 (BU/OG) to ground is not greater than 10, 000 ohms, GO to W6.
  If the resistance of C3305A-J, circuit CHS01 (GY/VT) and/or C3305A-K, circuit RHS01 (WH/VT) to ground is not greater than 10, 000 ohms, GO to W7.

W2 CHECK TED CIRCUITS FOR A SHORT TO VOLTAGE

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 .
Ignition ON.

Measure the voltage between DCSM C3305A, harness side and ground using the following chart:

Connector	Circuit
C3305A-G	CHS02 (YE/BU)
C3305A-H	RHS02 (BU/OG)
C3305A-J	CHS01 (GY/VT)
C3305A-K	RHS01 (WH/VT)

Fig 2: Measuring Voltage Between DCSM C3305A, Harness Side And Ground

Courtesy of FORD MOTOR CO.

Is voltage present on any circuits?
- Yes: If voltage is present at C3305A-G and/or C3305A-H, GO to W8.
  If voltage is present at C3305A-J and/or C3305A-K, GO to W9.
- No: GO to W3.

W3 CHECK THE RESISTANCE OF THE TED AND WIRING
- Ignition OFF.
- Measure the resistance between:
  - DCSM C3305A-G, circuit CHS02 (YE/BU), harness side and DCSM C3305A-H, circuit RHS02 (BU/OG), harness side.
  - DCSM C3305A-J, circuit CHS01 (GY/VT), harness side and C3305A-K, circuit RHS01 (WH/VT), harness side.
  Fig 3: Checking TED And Wiring Resistance
  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 driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  - No: If the resistance between DCSM C3305A-G and C3305A-H is not between 0.9 and 10 ohms, GO to W5.
    If the resistance between DCSM C3305A-J and C3305A-K is not between 0.9 and 10 ohms, GO to W4.
W4 CHECK THE BACKREST TED RESISTANCE
- Disconnect: Backrest TED C3310.
- Measure the resistance between backrest TED C3310 pin 1 and pin 3, component side.
  
  Fig 4: Measuring Resistance Between Backrest TED C3310 Pin 1 And Pin 3, Component Side
  Courtesy of FORD MOTOR CO.
- Is the resistance between 0.9 and 10 ohms?
  - Yes: REPAIR circuit CHS01 (GY/VT) or RHS01 (WH/VT) for an open. REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  - No: INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
W5 CHECK THE CUSHION TED RESISTANCE
- Disconnect: Cushion TED C3300.
- Measure the resistance between cushion TED C3300 pin 1 and pin 3, component side.
  
  Fig 5: Measuring Resistance Between Cushion TED C3300 Pin 1 And Pin 3, Component Side
  Courtesy of FORD MOTOR CO.
- Is the resistance between 0.9 and 10 ohms?
  - Yes: REPAIR circuit CHS02 (YE/BU) or RHS02 (BU/OG) for an open. REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  - No: 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 driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
W6 CHECK CUSHION TED CIRCUITS FOR A SHORT TO GROUND
- Disconnect: Cushion TED C3300.
- Measure the resistance between:
  - DCSM C3305A-G, circuit CHS02 (YE/BU), harness side and ground.
  - DCSM C3305A-H, circuit RHS02 (BU/OG), harness side and ground.
  Fig 6: Checking Cushion TED Circuits For Short To Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10, 000 ohms?
  - Yes: 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 driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  - No: REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
W7 CHECK BACKREST TED CIRCUITS FOR A SHORT TO GROUND
- Disconnect: Backrest TED C3310.
- Measure the resistance between:
  - DCSM C3305A-J, circuit CHS01 (GY/VT), harness side and ground.
  - DCSM C3305A-K, circuit RHS01 (WH/VT), harness side and ground.
  Fig 7: Measuring Resistance Between DCSM C3305A-J, Circuit CHS01 (GY/VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10, 000 ohms?
  - Yes: INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  - No: REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
W8 CHECK CUSHION TED CIRCUITS FOR A SHORT TO VOLTAGE
- Disconnect: Cushion TED C3300.
- Ignition ON.
- Measure the voltage between:
  - DCSM C3305A-G, circuit CHS02 (YE/BU), harness side and ground.
  - DCSM C3305A-H, circuit RHS02 (BU/OG), harness side and ground.
  Fig 8: Checking Cushion TED Circuits For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is voltage present on either circuit?
  - Yes: REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  - No: 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 driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
W9 CHECK BACKREST TED CIRCUITS FOR A SHORT TO VOLTAGE
- Disconnect: Backrest TED C3310.
- Ignition ON.
- Measure the voltage between:
  - DCSM C3305A-J, circuit CHS01 (GY/VT), harness side and ground.
  - DCSM C3305A-K, circuit RHS01 (WH/VT), harness side and ground.
  Fig 9: Checking Backrest TED Circuits For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is voltage present on either circuit?
  - Yes: REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  - No: INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . REPEAT the self-test. CLEAR the DTCs.
    DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .