Operation CHARM: Car repair manuals for everyone.
Home >> Lincoln >> 2006 >> LS V8-3.9L VIN A >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Pinpoint Tests >> Test M: The Driver Temperature Control Seat Module Does Not Respond To The Diagnostic Tool
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test M: The Driver Temperature Control Seat Module Does Not Respond To The Diagnostic Tool

PINPOINT TEST M: THE DRIVER TEMPERATURE CONTROL SEAT MODULE DOES NOT RESPOND TO THE DIAGNOSTIC TOOL


M1-M3:






M4-M6:






M7-M9:






Normal Operation
The driver temperature control seat module communicates with the diagnostic tool through the universal asynchronous receiver-transmitter (UART)-based protocol (UBP) communications network circuit 4-HC21 (GY/OG). If circuit 4-HC21 (GY/OG) becomes open or shorted to ground, communications to that module are not possible. Check circuit 4-HC21 (GY/OG) between the temperature control seat module and the data link connector (DLC) C251. The total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms, there is either an open in circuit 4-HC21 (GY/OG), damage to the DLC C251, damage to the driver temperature control seat module C3031a, or a problem with in-line C213, in-line C315 or joint connector No. 1 C261.

Possible Causes
- UBP circuit 4-HC21 (GY/OG) open
- joint connector No. 1 C261
- in-line C213
- in-line C315
- driver temperature control seat module C3031a
- driver temperature control seat module
pro multis · About Operation CHARM