Front Seats — 2016 workshop reference 1058

Ambient Temperature	Resistance
0-10° C (32-50° F)	2,782-1,663 ohms
10-20° C (50-68° F)	1,837-1,140 ohms
20-30° C (68-86° F)	1,260-806 ohms
30-40° C (86-104° F)	893-570 ohms
40-50° C (104-122° F)	630-428 ohms

Is the resistance within the limits indicated?

Yes	GO to AA18
No	GO to AA4

AA4 CHECK THE PASSENGER SEAT BACKREST BLOWER MOTOR THERMISTOR

Disconnect: Passenger Seat Backrest Blower Motor C3039. Measure the component side resistance between:

Positive Lead	Measurement / Action	Negative Lead
C3039-5, Component Side Front Seats — original illustration 1, reference 1058Original colors & callouts · Select to enlarge		C3039-8, Component Side Front Seats — original illustration 2, reference 1058Original colors & callouts · Select to enlarge

Positive Lead

Measurement /

Action

Negative Lead

C3039-5, Component Side

Front Seats — original illustration 1, reference 1058Original colors & callouts · Select to enlarge

C3039-8, Component Side

Front Seats — original illustration 2, reference 1058Original colors & callouts · Select to enlarge

Compare the measured resistance value with the following table:

Ambient Temperature	Resistance
0-10° C (32-50° F)	2,782-1,663 ohms
10-20° C (50-68° F)	1,837-1,140 ohms
20-30° C (68-86° F)	1,260-806 ohms
30-40° C (86-104° F)	893-570 ohms
40-50° C (104-122° F)	630-428 ohms

Is the resistance within the limits indicated?

Yes	REPAIR circuit VHS36 (YE/BU) or RHS20 (GN/BU) for an open or high resistance. GO to AA22
No	INSTALL a new passenger seat backrest blower motor. REFER to: Front Seat Backrest Blower Motor (501-10 Front Seats) . GO to AA22

AA5 CONFIRM THE FAULT WHILE MONITORING THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) SEAT BACK THERMO-ELECTRIC DEVICE TEMPERATURE (PBKTEMP) AND SEAT CUSHION THERMO-ELECTRIC DEVICE TEMPERATURE (PCSHTEMP) PARAMETER IDENTIFICATIONS (PIDS)

Set the passenger seat to OFF. Using a diagnostic scan tool, clear the SCME Diagnostic Trouble Codes (DTCs). Using a diagnostic scan tool, monitor the SCME PBKTEMP and PCSHTEMP Parameter Identifications (PIDs).

NOTE: A crushed seat backrest foam pad may be the cause of the fault, making it necessary to occupy the seat to recreate and identify the fault. Attempt to recreate the fault. Start the vehicle and set the passenger seat to HIGH heat for at least 15 minutes while occupying the seat.

Do the Parameter Identifications (PIDs) increase incrementally (gradually) and stay within 15° C (27° F) of each other?

Yes Fault not present at this time. Fault may have been set due to a past failure, incorrect use of the climate controlled seat system by repeated switching between heat and cool modes or due to excessive passenger compartment temperature. No If the PBKTEMP PID increases incrementally and is greater than 15° C (27° F) of the PCSHTEMP PID, GO to AA6

Original table alignment retained · Scroll horizontally if needed

Source reference 1058

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.