Symptom Chart

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No communication with the driver seat module (DSM)	Fuse Circuitry DSM	DEPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. DISCONNECT driver seat side air bag C327. CONNECT the battery ground cable. REFER to BATTERY, MOUNTING AND CABLES article. CHECK DSM C3299a pin 2, circuit SBB32 (VT/RD) and C3299c pin 1, circuit SBB15 (WH/RD) for greater than 10 volts; REPAIR as needed. CHECK DSM C3299a pin 1, circuit GD126 (BK/WH) and C3299c pin 13, circuit GD126 (BK/WH) for less than 5 ohms to ground; REPAIR as needed. If OK, REFER to MODULE COMMUNICATIONS NETWORK article. DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
No communication with the module - unable to carry out self-test with the DSM	Circuitry DSM	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the dual climate controlled seat module (DCSM)	Fuse Circuitry DCSM	DEPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. DISCONNECT passenger seat side air bag module C313. CONNECT the battery ground cable. REFER to BATTERY, MOUNTING AND CABLES article. DISCONNECT and CHECK DCSM C3305a-E, circuit SBB11 (BU/RD), harness side and DCSM C3305a-F, circuit SBB12 (GN/RD), harness side for greater than 10 volts and DCSM C3305a-M, circuit GD139 (BK/YE), harness side for less than 5 ohms to ground and REPAIR as needed. If OK, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the medium-speed controller area network (MS-CAN) communication bus concern. Once the repair is complete, DISCONNECT the battery ground cable. CONNECT the passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
The power seat is inoperative - driver, with power recliner	Fuse Circuitry Front seat control switch	Go to Pinpoint Test A .
The power seat is inoperative - driver, without power recliner	Fuse Circuitry Front seat control switch	Go to Pinpoint Test B .
The power seat is inoperative - passenger	Fuse Circuitry Front seat control switch	Go to Pinpoint Test C .
The power seat moves but is loose	Fastening hardware Seat track	Go to Pinpoint Test D .
The power seat moves but is noisy	Seat track	Go to Pinpoint Test E .
The power seat does not make full travel	Seat track obstructed Seat track	Go to Pinpoint Test F .
The power seat does not move horizontally/vertically/recline - driver	Circuitry Front seat motors Front seat control switch	Go to Pinpoint Test G .
The power seat does not move horizontally/vertically - driver	Circuitry Front seat motors Front seat control switch	Go to Pinpoint Test H .
The power seat does not move horizontally/vertically/recline - passenger	Circuitry Front seat motors Front seat control switch	Go to Pinpoint Test I .
The memory seat is inoperative/does not operate correctly - does not operate horizontally/vertically/recline	Circuitry Seat control switch DSM	Go to Pinpoint Test J .
The memory seat does not operate correctly - does not operate using the memory SET switch	Circuitry Memory SET switch DSM	Go to Pinpoint Test K .
The memory seat does not operate correctly - the seat moves in one second intervals	Circuitry DSM	REFER to the DRIVER SEAT MODULE (DSM) DTC CHART .
The memory seat does not operate correctly - the seat does not move to the correct memory position	Circuitry Memory SET switch DSM Seat track	REFER to the DRIVER SEAT MODULE (DSM) DTC CHART .
The memory seat does not operate correctly - does not operate using the remote transmitter	Circuitry DSM Keyless entry transmitter	VERIFY the RKE transmitter is operating correctly and is associated to a memory position. REFER to Owner's Literature or HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article for information on associating a RKE transmitter. RUN the DSM Self-Test and REFER to the DRIVER SEAT MODULE (DSM) DTC CHART to diagnose any DTCs retrieved.
Easy exit/easy entry is inoperative/does not operate correctly	Circuitry Key in ignition switch Instrument cluster (IC) module DSM	Go to Pinpoint Test L .
The power lumbar is inoperative - driver	Circuitry Seat control switch Power lumbar motor assembly	Go to Pinpoint Test M .
The power lumbar is inoperative - passenger	Circuitry Seat control switch Power lumbar motor assembly	Go to Pinpoint Test N .
The heated seat is inoperative - driver	Fuse Circuitry Heated seat switch Seat cushion heater mat Seat backrest heater mat Heated seat module	Go to Pinpoint Test O .
The heated seat is inoperative - passenger	Fuse Circuitry Heated seat switch Seat cushion heater mat Seat backrest heater mat Heated seat module	Go to Pinpoint Test P .
The heated seat is inoperative - driver seat does heat but the heated seat indicator does not illuminate when pressed	Wiring, terminals or connectors HVAC module Heated seat module	Go to Pinpoint Test Q .
The heated seat is inoperative - passenger seat does heat but the heated seat indicator does not illuminate when pressed	Wiring, terminals or connectors HVAC module Heated seat module	Go to Pinpoint Test R .
All climate controlled seats are inoperative	Fuse Circuitry MS-CAN communication fault DCSM HVAC module	VERIFY battery junction box (BJB) fuse 11 (30A) and 12 (30A) are OK. If OK, CARRY OUT the Data Links Diagnostics test using a scan tool and verify network communication of the HVAC and DCSM. REFER to MODULE COMMUNICATIONS NETWORK article to diagnose a module communication or network concern. If OK, CARRY OUT the DCSM self-test and retrieve any DTCs. If any DTC is present, REFER to the DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) DTC CHART . CHECK the climate control system for correct operation. REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article for diagnosis of the HVAC or climate control system. If OK, INSTALL a new dual climate controlled seat module (DCSM) and CARRY OUT programmable module installation (PMI). REFER to Dual Climate Controlled Seat Module (DCSM) .
A single climate controlled seat is inoperative - switch indicators may or may not illuminate	Circuitry HVAC module DCSM	NOTE: If a fault occurs setting a DTC specific to only one climate controlled seat, the DCSM will disable only the affected seat outputs and allow the other seat to remain operational. CHECK for DTCs specific to the affected climate controlled seat and, if a DTC is present, REFER to the DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) DTC CHART . NOTE: The DCSM receives battery voltage to C3305a pins E and F. Pin F is used by the module for driver seat system operation and pin E is used for the passenger seat system operation. It may be possible for voltage to be missing from one pin location and cause only one climate controlled seat to become inoperative. Go to Pinpoint Test AG .