2007 Compass Patriot MK Factory Service Manual 8 - ELECTRICAL

DIAGNOSIS AND TESTING

B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Ignition on, during the heated seat operation.

  • Set Condition:

    This code is set immediately after the Heated Seat Module (HSM) detects the control circuit shorted to ground.


Possible Causes
  
(P187) LEFT SEAT HEATER B(+) DRIVER SHORTED TO GROUND
  
SEAT CUSHION HEATER ELEMENT SHORTED
  
SEAT BACK HEATER ELEMENT SHORTED
  
HEATED SEAT MODULE
  



Diagnostic Test

1. VERIFY THAT DTC B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW IS ACTIVE

With the scan tool, record and erase DTC's.
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.

Does the DTC B1092 – FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW reset?

Yes


No

2. DISCONNECT LEFT SEAT CUSHION HEATER 2-WAY CONNECTOR AND READ DTC'S



Disconnect the Left Seat Cushion Heater 2–way connector.

NOTE: Check connectors - Clean and repair as necessary.


With the scan tool, erase HSM DTC's
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.

Does the scan tool display the same DTC?

Yes


No

3. CHECK THE (P187) LEFT SEAT HEATER B(+) DRIVER FOR A SHORT TO GROUND AT THE SEAT



Measure between the (P187) Left Seat Heater B(+) Driver circuit at the Left Seat Heater connector (component side) and the seat frame for a short to ground.

Is the resistance below 1000 ohms?

No


Yes

4. CHECK THE LEFT HEATER ELEMENT SEAT CUSHION AND SEAT BACK RESISTANCE



Gain access to the seat cushion and seat back heater connectors.
Check the resistance of each of the heater elements by measuring between the (P187) Left Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors.
For the seat cushion element, the resistance value is 3 to 5.5 ohms.
For the seat back element, the resistance value is 4 to 6 ohms.

Is the resistance correct for each heater element?

Yes
  • Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent short to ground.


No

5. CHECK THE (P187) LEFT SEAT HEATER B(+) DRIVER CIRCUIT FOR A SHORT TO GROUND



Ensure the Left Seat Cushion Heater 2–way connector is still disconnected.
Disconnect the Heated Seat Module connector.

NOTE: Check connectors - Clean and repair as necessary.


Measure the (P187) Left Seat Heater B(+) Driver circuit cavity D for (LHD) or K for (RHD) at the HSM connector to ground.

Is the resistance below 5.0 ohms?

Yes


No

B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Ignition on, during the heated seat operation.

  • Set Condition:

    This code is set immediately after the Heated Seat Module detects an open in the seat heater B(+) driver circuit.


Possible Causes
  
(P187) LEFT SEAT HEATER B(+) DRIVER WIRE OPEN
  
(Z960) GROUND WIRE OPEN
  
SEAT CUSHION HEATER ELEMENT OPEN
  
SEAT BACK HEATER ELEMENT OPEN
  
HEATED SEAT MODULE
  



Diagnostic Test

1. VERIFY THAT DTC B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN IS ACTIVE

With the scan tool, record and erase DTC's.
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.

Does the DTC B1094 FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN reset?

Yes


No

2. CHECK FOR AN OPEN SEAT HEATER ELEMENT CIRCUIT



Disconnect the Left Seat Cushion Heater 2–way connector.

NOTE: Check connectors - Clean and repair as necessary.


Measure the total resistance of the cushion and seat back heater elements at the Left Seat Cushion 2–way connector (component side).

Is the total resistance 2.5 to 3.5 ohms + or – .5 ohms?

Yes


No

3. CHECK THE LEFT SEAT HEATER ELEMENT RESISTANCE



Gain access to and disconnect the seat cushion and seat back heater connectors.

NOTE: Check connectors - Clean and repair as necessary.


Measure each of the heater elements by measuring between the (P187) Left Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors.
For the seat cushion element, the resistance value is 3 to 5.5 ohms.
For the seat back element, the resistance value is 4 to 6 ohms.

Is the resistance correct for each heater element?

Yes


No

4. CHECK THE LEFT SEAT HEATER GROUND CIRCUIT



Using a 12-volt test light connected to 12-volts, check the (Z960) Ground circuit at the Left Seat Cushion Heater 2–way connector (harness side).

Does the test light illuminate brightly?

Yes


No

5. CHECK THE (P187) LEFT SEAT HEATER B(+) DRIVER CIRCUIT FOR AN OPEN.



Disconnect the Heated Seat Module connector.

NOTE: Check connectors - Clean and repair as necessary.


Measure the (P187) Left Seat Heater B(+) Driver circuit cavity D for (LHD) or K for (RHD) from the HSM connector to the Left Seat Cushion Heater 2–way connector (harness side).

Is the resistance below 5.0 ohms?

Yes


No

B1096-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Ignition on, during the heated seat operation.

  • Set Condition:

    This code is set immediately after the Heated Seat Module detects the control circuit shorted to ground.


Possible Causes
  
(P188) RIGHT SEAT HEATER B(+) DRIVER SHORTED TO GROUND
  
SEAT CUSHION HEATER ELEMENT SHORTED
  
SEAT BACK HEATER ELEMENT SHORTED
  
HEATED SEAT MODULE
  



Diagnostic Test

1. VERIFY THAT DTC B1096-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT LOW IS ACTIVE

With the scan tool, record and erase DTC's.
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.

Does the DTC B1096 – FRONT RIGHT SEAT HEATER CONTROL CIRCUIT LOW reset?

Yes


No

2. DISCONNECT RIGHT CUSHION HEATER 2-WAY CONNECTOR AND READ DTC'S



Disconnect the Left Seat Cushion Heater 2–way connector.

NOTE: Check connectors - Clean and repair as necessary.


With the scan tool, erase HSM DTC's.
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.

Does the scan tool display the same DTC?

Yes


No

3. CHECK THE (P188) RIGHT SEAT HEATER B(+) DRIVER FOR A SHORT TO GROUND AT THE SEAT



Measure between the (P188) Right Seat Heater B(+) Driver circuit at the Right Seat Heater connector (component side) and the seat frame for a short to ground.

Is the resistance below 1000 ohms?

No


Yes

4. CHECK THE RIGHT HEATER ELEMENT SEAT CUSHION AND SEAT BACK RESISTANCE



Gain access to the seat cushion and seat back heater connectors.
Check the resistance of each of the heater elements by measuring between the (P188) Right Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors.
For the seat cushion element, the resistance value is 3 to 5.5 ohms.
For the seat back element, the resistance value is 4 to 6 ohms.

Is the resistance correct for each heater element?

Yes
  • Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent short to ground.


No

5. CHECK THE (P188) RIGHT SEAT HEATER B(+) DRIVER CIRCUIT FOR A SHORT TO GROUND



Ensure the Right Seat Cushion Heater 2–way connector is still disconnected.
Disconnect the Heated Seat Module connector.

NOTE: Check connectors - Clean and repair as necessary.


Measure the (P188) Right Seat Heater B(+) Driver circuit cavity K for (LHD) or D for (RHD) at the HSM connector to ground.

Is the resistance below 5.0 ohms?

Yes


No

B1098-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPEN





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Ignition on, during the heated seat operation.

  • Set Condition:

    This code is set immediately after the Heated Seat Module detects an open in the seat heater B(+) driver circuit.


Possible Causes
  
(P188) RIGHT SEAT HEATER B(+) DRIVER WIRE OPEN
  
(Z940) GROUND WIRE OPEN
  
SEAT CUSHION HEATER ELEMENT OPEN
  
SEAT BACK HEATER ELEMENT OPEN
  
HEATED SEAT MODULE
  



Diagnostic Test

1. VERIFY THAT DTC B1098-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPEN IS ACTIVE

With the scan tool, record and erase DTC's.
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC's.

Does the DTC B1098 FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPEN reset?

Yes


No

2. CHECK FOR AN OPEN SEAT HEATER ELEMENT



Disconnect the Right Seat Cushion Heater 2–way connector.

NOTE: Check connectors - Clean and repair as necessary.


Measure the total resistance of the cushion and seat back heater elements at the Right Seat Cushion 2–way connector (component side).

Is the total resistance 2.5 to 3.5 ohms + or – .5 ohms?

Yes


No

3. CHECK THE RIGHT SEAT HEATER ELEMENT RESISTANCE



Gain access to and disconnect the seat cushion and seat back heater connectors.

NOTE: Check connectors - Clean and repair as necessary.


Measure each of the heater elements by measuring between the (P188) Right Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors.
For the seat cushion element, the resistance value is 3 to 5.5 ohms.
For the seat back element, the resistance value is 4 to 6 ohms.

Is the resistance correct for each heater element?

Yes


No

4. CHECK THE SEAT HEATER GROUND CIRCUIT



Using a 12-volt test light connected to 12-volts, check the (Z940) Ground circuit at the Right Seat Cushion Heater 2–way connector (harness side).

Does the test light illuminate brightly?

Yes


No

5. CHECK THE (P188) RIGHT SEAT HEATER B(+) DRIVER CIRCUIT FOR AN OPEN.



Disconnect the Heated Seat Module connector.

NOTE: Check connectors - Clean and repair as necessary.


Measure the (P188) Right Seat Heater B(+) Driver circuit cavity K for (LHD) or D for (RHD) from the HSM connector to the Right Seat Cushion Heater 2–way connector (harness side).

Is the resistance below 5.0 ohms?

Yes


No

B10BB - LEFT HEATED SEAT SWITCH INPUT CIRCUIT STUCK - CLUSTER





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Continuously

  • Set Condition:

    When the Heated Seat Switch in the Switch Bank is held in the On position for over 10 seconds, this code will set.


Possible Causes
  
(D506) LIN BUS CIRCUIT PARTIAL SHORT TO GROUND
  
SWITCH BANK STUCK
  
INSTRUMENT CLUSTER
  



Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

Turn the ignition on.
With the scan tool, record and erase DTC's.
Operate the Heated Seat Switch several times.
Cycle the ignition from on to off.
Turn the ignition on.
With the scan tool, read DTC's.

Does the scan tool display B10BB LEFT HEATED SEAT SWITCH INPUT CIRCUIT STUCK?

Yes


No

2. SWITCH SHORTED



With the scan tool, erase DTC's.
Disconnect the Switch Bank connector.
With the scan tool, read DTC's.

Does the scan tool display B10BB – LEFT HEATED SEAT SWITCH INPUT CIRCUIT STUCK?

No


Yes

3. (D506) LIN BUS CIRCUIT PARTIAL SHORT TO GROUND



Turn the ignition off.
Disconnect the Cluster C3 connector.
Measure the resistance between ground and the (D506) LIN Bus circuit.

Is the resistance below 10000.0 ohms?

Yes


No

B10BC - RIGHT HEATED SEAT SWITCH INPUT CIRCUIT STUCK - CLUSTER





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Continuously

  • Set Condition:

    When the Heated Seat Switch in the Switch Bank is held in the On position for over 10 seconds, this code will set.


Possible Causes
  
(D506) LIN BUS CIRCUIT PARTIAL SHORT TO GROUND
  
SWITCH BANK STUCK
  
INSTRUMENT CLUSTER
  



Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

Turn the ignition on.
With the scan tool, record and erase DTC's.
Operate the Heated Seat Switch several times.
Cycle the ignition from on to off.
Turn the ignition on.
With the scan tool, read DTC's.

Does the scan tool display B10BC RIGHT HEATED SEAT SWITCH INPUT CIRCUIT STUCK?

Yes


No

2. SWITCH SHORTED



With the scan tool, erase DTC's.
Disconnect the Switch Bank connector.
With the scan tool, read DTC's.

Does the scan tool display B10BC – RIGHT HEATED SEAT SWITCH INPUT CIRCUIT STUCK?

No


Yes

3. (D506) LIN BUS CIRCUIT PARTIAL SHORT TO GROUND



Turn the ignition off.
Disconnect the Cluster C3 connector.
Measure the resistance between ground and the (D506) LIN Bus circuit.

Is the resistance below 10000.0 ohms?

Yes


No

B2181- HEATED SEAT MODULE POWER SUPPLY LOW





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    During heated seat operation.

  • Set Condition:

    This code is set immediately if the Heated Seat Module detects voltage under 10 volts on the (F937) Fused Ignition Switch Output (Run) circuit.


Possible Causes
  
(F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT HIGH RESISTANCE
  
HEATED SEAT MODULE
  



Diagnostic Test

1. CHECK PCM FOR CHARGING SYSTEM DTC

With the scan tool, read Powertrain Control Module DTC's.

Are there any Charging System DTC's set in the Powertrain Control Module?

Yes
  • (Refer to 8 - ELECTRICAL/CHARGING - DIAGNOSIS AND TESTING) for Charging System diagnostic procedures.


No

2. VERIFY THAT DTC B2181 - HEATED SEAT MODULE POWER SUPPLY LOW IS ACTIVE

With the scan tool, record and erase DTC's.
Turn the ignition switch to the Off position then start the engine and operate the heated seats for one minute.
With the scan tool, read DTC's.

Does the DTC B2181 - HEATED SEAT MODULE POWER SUPPLY LOW reset?

Yes


No

3. (F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT HIGH RESISTANCE



Disconnect the Heated Seat Module connector.

NOTE: Check connectors - Clean and repair as necessary.


Start the engine and let idle.
Using a 12-volt test light connected to ground, check the (F937) Fused Ignition Switch Output (Run) circuit at the HSM connector.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.



Does the test light illuminate brightly?

Yes


No

B2182- HEATED SEAT MODULE POWER SUPPLY HIGH

For a complete wiring diagram Refer to Section 8W.



Possible Causes
  
TROUBLE CODE PRESENT
  
CHARGING SYSTEM HIGH
  



Diagnostic Test

1. CHECK PCM FOR CHARGING SYSTEM DTC

With the scan tool, record and erase DTC's.
Cycle the ignition switch from On to Off.
Start the engine.
Run the engine at approximately 1500 RPM for 1 minute.
With the scan tool, read DTCs.
With the scan tool, read Powertrain Control Module DTC's.

Are there any Charging System DTC's set in the Powertrain Control Module?

Yes


No

B221A-HEATED SEAT MODULE INTERNAL

For a complete wiring diagram Refer to Section 8W.



Possible Causes
  
HEATED SEAT MODULE
  



Diagnostic Test

1. VERIFY THAT DTC B221A-HEATED SEAT MODULE INTERNAL IS ACTIVE

With the scan tool, record and erase DTC's.
Cycle the ignition switch off then back on.
With the scan tool, read DTC's.

Does the DTC B221A-HEATED SEAT MODULE INTERNAL reset?

Yes


No