Pinpoint Test W : B19A2

NOTE: When taking measurements at 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 DTCs and system failure. Touching the tip of these connector pins is recommended instead.

W1 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

Ignition OFF.

Disconnect: Passenger Seat Side Air Bag C339 .

Disconnect: DCSM C3265C .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265C-4	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	GO to W2.
No	GO to W3.

W2 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect: Passenger Backrest TED C3039 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265C-4	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit. GO to W6.
No	GO to W3.

W3 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL AND BLOWER OUTPUT CIRCUITS FOR A SHORT TOGETHER

Ignition OFF.

Disconnect: Passenger Backrest TED C3039 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265C-4	Courtesy of FORD MOTOR COMPANY	C3265C-8

Is the resistance greater than 10, 000 ohms?

Yes	GO to W4.
No	REPAIR the circuits. GO to W6.

W4 CHECK THE BACKREST TED RESISTANCE FOR AN INTERNAL SHORT

Measure the component side resistance:

Positive Lead	Measurement / Action	Negative Lead
Passenger Seat Backrest TED C3039-2, Component Side	Courtesy of FORD MOTOR COMPANY	Passenger Seat Backrest TED C3039-7, Component Side

Is the resistance greater than 2, 000, 000 ohms?

Yes	GO to W5.
No	INSTALL a new seat backrest TED. Refer to Seat Backrest Thermo-Electric Device (TED) . GO to W6.

W5 CHECK FOR CORRECT DCSM OPERATION

Ignition OFF.

Disconnect and inspect all DCSM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out pins - install new pins as necessary

Reconnect the DCSM connectors. Make sure they seat and latch correctly.

Connect: Passenger Backrest TED C3039 (if previously disconnected).

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new DCSM. Refer to Dual Climate Controlled Seat Module (DCSM) . GO to W6.
No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. GO to W6.

W6 CHECK FOR SRS DTCs

Ignition OFF.

Connect: Passenger Seat Side Air Bag C339 .

Connect: DCSM C3265C .

Connect: Passenger Backrest TED C3039 (if previously disconnected).

Ignition ON.

Using a diagnostic scan tool, clear the RCM DTCs.

Cycle the ignition OFF then ON.

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

Are any RCM DTCs retrieved during self-test?

Yes	REFER to Supplemental Restraint System for pinpoint test direction.
No	The repair is complete. RETURN the vehicle to the customer.