Question about 2004 Jaguar XJ-Series

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Jaguar x350 03 model year no heater temp control to drivers side

Everything else re heater control working. The vehicle has not been dtc scanned re heating control system

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  • hbz3 May 11, 2010

    If this was due to "clogging up", wouldn't that affect both driver and passenger side outputs? This problem does indeed sem to be quite common. For your suggestion to be right, the car would need two matrixes, wouldnt it? I thouhgt myabe t would be some kind of aircontrol flap faulty, no?


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Hi Mark, I have exactly the same problem, Did you find a solution?

Posted on Aug 06, 2010

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This means that your heater is clogged up. It seems to be a common problem with the x350. Did you try flushing the system (opposite direction)?

Posted on Oct 09, 2009

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Seat heater comes on by itself in 2004 yukon denali

Heated Seat Components
The heated seat system consists of the following components:
• Driver and passenger heated seat switches
• Driver and passenger seat back heater elements
• Driver and passenger seat cushion heater elements
• Driver and passenger seat back temperature sensors
• Driver seat module
• Driver door module
• Passenger door module
When there are modules involved in the operation of any componet that's acting up , the module's electronic's could be the culprit ! But without testing who's to say what the problem could be !
I would have it check for DTC'S
DTC B2425 or B2430
The driver and passenger seat heaters are controlled by the driver seat module. Power is supplied to the driver seat cushion and back heater elements through individual voltage supply circuits. Power is supplied to the passenger seat cushion and back heater elements through a common voltage supply circuit. All of the driver and passenger seat heater elements are grounded by the driver seat module through individual low side drive control circuits. The heater element control circuits are pulse width modulated to ground by the driver seat module in order to control the seat temperatures by regulating the current flow through the heater elements.
DTC B2435 or B2440
The driver seat module relies on inputs from thermistors installed in the driver and passenger seat backs to control heated seat temperatures. The thermistors are 2-wire sensors supplied with a 5-volt referenced signal circuit and low reference circuit from the driver seat module. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise.
Install a scan tool.
Start the engine.
Turn the heated seat ON.
With a scan tool, observe the Heated Seat Sensor parameter in the data list for the driver seat module.
Does the scan tool indicate that the heated seat sensor parameter is within the specified range?
0.078-4.94 V

Dec 08, 2016 | GMC Yukon Denali Cars & Trucks

1 Answer

Speedo, fuel gauge, temp gauge not working

What make , model an year vehicle ? Most car makers use a serial data communication network to share information to the different modules on the vehicle . The VSS- vehicle speed sensor ,sending unit for the fuel level , temperature sensor are all inputs to the PCM/ECM / ECU . The engine computer sends this info to the instrument cluster via the data bus . How to Diagnose Controller Area Network CAN Your vehicle may have DTC'S - diagnostic trouble codes stored in one or more modules on the bus . You could have a data bus problem , couldn't really see all the gauges being bad or all the sensors being bad at one time either. Your best bet would be to take your vehicle to a shop that has a professional grade scan tool , that can communicate with all modules on the vehicle .

Apr 19, 2016 | Cars & Trucks

1 Answer

The car is overheating and the fans are not coming on. I changed the coolant temperature sensor still not working. I also jumped the fan they were working relay everything is good. No leaks.

What make , model an year vehicle ? The PCM / ECM engine computer controls that relay . The best way to diagnose this is to hook up a scan tool an see if the PCM / ECM can control ( turn on ) the relay ! I'm going to ask a silly question , what are you going by to determine the vehicle is over heating ? The Temperature gauge . Temp. gauges do go bad . Hooking up a professional grade scan tool that can read engine sensor data PID'S is the way to see what the PCM/ECM is seeing as far as engine temp. Most vehicles the cooling fans don't come on till 200 to 220 degrees ! You could buy a temp gun at harbor freight an see what the temp is at the upper rad. hose .

Feb 04, 2016 | Cars & Trucks

3 Answers

Air blowing cool on passenger side warm on driver side how to fix this

sounds like you have a temp door motor problem on the drivers side. the motors seize/stick and have to be replaced.

Aug 09, 2015 | 2005 Buick LeSabre

1 Answer

Acadia 2009 code C0561 what does it mean?

You won't find this information in a Haynes manual ! I know , I work for a GMC dealership , along with Chevy and Cadillac ! this information I'm adding is right out of GMC service information .
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors
DTC C0561 71: System Disabled Information Stored Invalid Serial Data Received

DTC C0561 72: System Disabled Information Stored Alive Counter Incorrect

DTC C0561 74: System Disabled Information Value of Signal Protection Calculation Incorrect

Circuit/System Description
The electronic brake control module (EBCM) receives serial data messages from the body control module (BCM), engine control module (ECM), instrument panel cluster (IPC), and the transmission control module (TCM) which are needed to perform antilock brake system (ABS), vehicle stability enhancement system (VSES), or traction control system (TCS) functions.
Conditions for Running the DTC
Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
The EBCM receives an invalid serial data message from another module.
Action Taken When the DTC Sets
The EBCM disables the traction control system (TCS)/ vehicle stability enhancement system (VSES).

A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC
The condition for the DTC is no longer present.

The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
This DTC indicates that there are no problems in the EBCM. The BCM, ECM, IPC and the TCM should be checked for a possible fault.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference Component Connector End Views
Description and Operation ABS Description and Operation
Electrical Information Reference ?€¢
Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs
Scan Tool Reference Control Module References for scan tool information
Circuit/System Verification

  1. With a scan tool, view the Invalid Signal Data Display.
  2. If no invalid signal are present, view Signal Fault Data in the Enhanced DTC Data.
  3. Refer to appropriate module for diagnosing the invalid message data.
  4. Do not replace the EBCM due to this DTC fault.
You would need a factory scan tool or equivalent too diagnose this ,not a code reader . So do your self a favor an take to a dealership. I've been doing this for thirty years .

Sep 26, 2014 | 2007 GMC Acadia SLE

1 Answer

Code P1655 NO DTC

Huh??? If there is a code P1655 then tere IS a DTC! DTC means Diagnostic Test Code. The DTC you have is P1655. So, I am not sure exactly what you are trying to say here.

DTC P1655 is a "Vehicle Specific" code. The only way to know for sure what the problem is, would be to look the code up based on the specific Year, Make, Model and Engine Size of the vehicle we are talking about.

For MOST GM vehicles, the code description is P1655 "EVAP Purge Solenoid Control Circuit".

I can't verify this without knowing what you are working on and cannot give yopu any specifics on how to repair it for the same reason.

Aug 21, 2011 | Pontiac Grand Am Cars & Trucks

3 Answers

My 2005 Jeep Liberty will not blow heat through heater ducts. Fan works fine but blows only cold air. Any idea what the problem is?

heater valve if you have 1 ,or temp control actuator which is under the dash and takes hours to replace!

Jan 30, 2010 | 2006 Jeep Liberty

3 Answers

My S-type heater is not working. Blowing only cold air. Also, The temp gage goes from cold to max hot within five minutes of starting the car. Any ideas would be appreciated

Hi There
I have had the same problem, if the climate control shows different temps at either side it most possible that the heater valve needs replacing, the valves inside get rusty and sieze up, it is situated at the front o/s at the side of the radiator. If temps are the same could be the control module

Jan 14, 2010 | 2000 Jaguar S-Type

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