Pinpoint Test AF : A Single Climate Controlled Seat Is Inoperative

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.

AF1 CHECK OPERATION OF BOTH CLIMATE CONTROLLED SEATS AND VERIFY THE SYMPTOM
- Check the operation of both climate controlled seats and verify the symptom.
Is only a single climate controlled seat inoperative?

Yes GO to AF2.

No If both seats are inoperative, GO to Symptom Chart .

AF2 CHECK FOR DCSM DTCs

Enter the following diagnostic mode on the scan tool: Self Test -- DCSM.

Were any DTCs retrieved during the self-tests?

Yes	GO to the Dual Climate Controlled Seat Module(DCSM) DTC Chart
No	GO to AF3.

AF3 CHECK OPERATION OF THE DCSM USING PIDs

NOTE: The purpose of this step is to verify the DCSM is able to receive and process inbound command messages from the network and demonstrate if the DCSM is operational. This indicates the FCIM may not be sending the commands correctly.

Enter the following diagnostic mode on the scan tool: DataLogger -- DCSM.
Driver Seat
- Seat cushion thermal electric device temperature (CSHTEMP)
- Seat back thermal electric device temperature (BK_TEMP)
- Climate-controlled seat heat command (TED_HEAT_D)
Front Passenger Seat
- Passenger Cushion Thermal Electric Device (TED) Temperature (PCSHTMP)
- Passenger Back TED Temperature (PBKTMP)
- Passenger TED Heat Mode (TED_HEAT_P)

NOTE: The DCSM active commands TED_HEAT_D (driver seat) and TED_HEAT_P (passenger seat) are limited to 15 seconds in the ON state.

Operate the affected climate controlled seat using the active command while monitoring the appropriate PIDs for that seat.
- When the command is in process the TED temperature PIDs on the affected seat should momentarily increase. If no temperature increase is noted, remove the cushion blower filter and repeat the active command while physically monitoring the cushion blower for fan movement.

Do the PID states or cushion blower movement indicate climate controlled seat operation when using the active command?

Yes	GO to AF4.
No	INSTALL a new DCSM. REFER to Dual Climate Controlled Seat Module (DCSM) in this information. REPEAT the self-test.

AF4 USE THE TOUCHSCREEN BUTTONS AND MONITOR THE DCSM PID FOR A RESPONSE

Enter the following diagnostic mode on the scan tool: DataLogger -- DCSM.
- Driver State Seat Mode (DCCSMOD) (driver seat)
- Passenger State Seat Mode (PCCSMOD) (passenger seat)

Start the engine.

NOTE: Operation of the climate controlled seats repeatedly on and off or repeatedly switching between heat and cool modes may cause DCSM DTCs to set, disabling one or both seat system and may require DTCs to be cleared before seat operation may continue. It is recommended to allow time between modes for seat temperatures to return toward ambient temperatures before continuing.

Attempt to operate the affected climate controlled seat in all modes using the appropriate buttons on the touchscreen interface while monitoring the DCSM PID DCCSMOD (driver seat) or PCCSMOD (passenger seat).

Do all the PID states match the climate controlled seat settings selected on the touchscreen interface?

Yes

If the fault is intermittent, CHECK for causes of the intermittent fault. INSPECT the connectors, terminals and wiring. ATTEMPT to recreate the fault by flexing the wire harness and operating the system. CHECK the electrical connectors for corrosion, poor pin contact or pushed-out pins. REPAIR any intermittent concerns found and TIGHTEN any loose DCSM connector pins. CLEAR the DTCs. REPEAT the self-test.

REFER to Information And Entertainment System - 8-Inch (203 Mm) Touchscreen, 7 Speakers or Information and Entertainment Systems - Sony Sound 8-Inch (203 mm) Touchscreen, 12 Speakers to diagnose the inoperative touchscreen button(s). TEST the system for normal operation.

Yes	GO to AF2.
No	If both seats are inoperative, GO to Symptom Chart .