2007 Compass Patriot MK Factory Service Manual 8 - ELECTRICAL

DIAGNOSIS AND TESTING

TIPM-B2336-HORN CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    With the ignition on. Battery voltage greater than 10.4 volts.

  • Set Condition:

    A shorted low condition on the (X21)/(X22) Horn Control Output circuit.


Possible Causes
  
(X21) HORN CONTROL OUTPUT CIRCUIT SHORTED TO GROUND
  
(X22) HORN CONTROL OUTPUT CIRCUIT SHORTED TO GROUND (EXPORT)
  
TIPM
  



Diagnostic Test

1. VERIFY DTC B2336–HORN CONTROL CIRCUIT LOW IS ACTIVE

With the scan tool, erase TIPM DTCs.
Operate the Horn Switch several times.
With the scan tool, read TIPM DTCs.

Does the scan tool display active DTC B2336-HORN CONTROL CIRCUIT LOW?

Yes


No

2. (X21)/(X22) HORN CONTROL OUTPUT CIRCUIT SHORTED TO GROUND



Turn the ignition off.
Disconnect the horn connector(s).
Disconnect the C11 TIPM harness connector.
Measure the resistance between ground and the Horn Control Output circuit(s) at the horn connector(s).

Is the resistance below 100 ohms?

Yes


No

3. HORN



Connect the C11 TIPM harness connector.
Turn the ignition on, engine not running.
Using the scan tool under the TIPM Actuators, actuate the Horn.
With a 12-volt test light connected to ground, probe the Horn Control Output circuit at the Horn connector(s).

Does the test light illuminate brightly and flash on and off?

Yes


No

4. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.


Using the schematics as a guide, inspect the wire harness and connectors.
Pay particular attention to all Power and Ground circuits.

Were any problems found?

Yes


No

TIPM-B2337-HORN CONTROL CIRCUIT HIGH





For a complete wiring diagram Refer to Section 8W


  • When Monitored:

    With the ignition on. Battery voltage greater than 10.4 volts.

  • Set Condition:

    A shorted high condition in the (X21)/(X22) Horn Control Output circuit.


Possible Causes
  
(X21) HORN CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE
  
(X22) HORN CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE (EXPORT)
  
EXCESSIVE RESISTANCE IN THE HORN OR CASE GROUND
 
TOTALLY INTEGRATED POWER MODULE
  



Diagnostic Test

1. CHECK FOR ACTIVE DTC B2337 – HORN CONTROL CIRCUIT HIGH IN THE TIPM

Turn the ignition on.
With the scan tool, record and erase DTC's.
Operate the Horn Switch several times.
With the scan tool, read DTC's.

Does the scan tool display active DTC B2337–HORN CONTROL CIRCUIT HIGH?

Yes


No

2. CHECKING THE HORN(S)

Turn the ignition off.
Disconnect the Horn(s) connector(s).
Momentarily jumper 12-volts to the horn(s).

Did the horn(s) operate properly?

Yes


No

3. CASE GROUND CIRCUIT OPEN

Using a 12-volt test light connected to 12-volts, check for a good case ground at the horn(s) case.

Does the test light illuminate brightly?

Yes


No

4. (X21)/(X22) HORN CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE



Turn the ignition off.
Disconnect the C11 TIPM harness connector.
Ignition on, engine not running.
Measure the voltage between (X21)/(X22) Horn Control Output circuit(s) and ground at the horn connector(s).

Is there any voltage present?

Yes


No

5. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.


Using the schematics as a guide, inspect the wire harness and connectors.
Pay particular attention to all Power and Ground circuits.

Were any problems found?

Yes


No

TIPM-B2338-HORN CONTROL CIRCUIT OPEN





For a complete wiring diagram Refer to Section 8W


  • When Monitored:

    With the ignition on. Battery voltage greater than 10.4 volts.

  • Set Condition:

    An open condition on the (X21)/(X22) Horn Control Output circuit.


Possible Causes
  
TERMINAL DAMAGE OR CORROSION
  
(X21) HORN CONTROL OUTPUT CIRCUIT OPEN
  
(X22) HORN CONTROL OUTPUT CIRCUIT OPEN (EXPORT)
  
HORN CASE GROUND
  
HORN
  
TOTALLY INTEGRATED POWER MODULE
  



Diagnostic Test

1. CHECK FOR ACTIVE DTC B2338–HORN CONTROL CIRCUIT OPEN

Turn the ignition on.
With the scan tool, record and erase DTC's.
Operate the horn switch several times.
With the scan tool, read DTC's.

Does the scan tool display active DTC B2338–HORN CONTROL CIRCUIT OPEN?

Yes


No

2. VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION

Turn the ignition off.
Inspect the following connector terminal condition. Check for signs of corrosion build up or damage that would compromise the terminal to controller pin connector.

NOTE: Make sure that all in-line connectors are inspected for corrosion and/or damage.


Disconnect the horn connectors.
Disconnect the C11 TIPM harness connector.
Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.

Were any of the above conditions found?

Yes


No

3. (X21)/(X22) HORN CONTROL OUTPUT CIRCUIT OPEN


NOTE: Cavity 8 at the C11 TIPM harness connector is for export vehicles only.


Turn the ignition off.
Measure the resistance of the (X21)/(X22) Horn Control Output circuit between the C11 TIPM harness connector and the Horn connector(s).

Is the resistance below 5.0 ohms?

Yes


No

4. CHECKING HORN OPERATION

Turn the ignition off.
Disconnect the horn(s) connector(s) if not disconnected.
Momentarily jumper 12-volts to the horn(s).

Did the horn(s) operate properly?

Yes


No

5. CASE GROUND CIRCUIT OPEN

Using a 12-volt test light connected to 12-volts, check for a good case ground at the horn(s) case.

Does the test light illuminate brightly?

Yes


No

6. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.


Using the schematics as a guide, inspect the wire harness and connectors.
Pay particular attention to all Power and Ground circuits.

Were any problems found?

Yes


No

CCN-B2339-HORN SWITCH STUCK





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Continuously.

  • Set Condition:

    The Cluster senses that the Horn switch is in the Set position for greater than 50 seconds.


Possible Causes
  
HORN SWITCH
  
CLOCKSPRING
  
(X3) HORN SWITCH SENSE CIRCUIT SHORTED TO GROUND
  
CLUSTER
  



Diagnostic Test

1. VERIFY DTC B2339 – HORN SWITCH STUCK IS ACTIVE

With the scan tool, erase CCN DTCs.
Operate the Horn Switch several times.
Wait 1 minute.
With the scan tool, read CCN DTCs.

Does the scan tool display active DTC B2339-HORN SWITCH STUCK?

Yes


No

2. HORN SWITCH


WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding.

WARNING: Do not place an intact undeployed airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed, and could results in serious or fatal injury.


Remove the Driver Airbag in accordance with the Service information.
Disconnect the Steering Control Module C5 connector.

NOTE: Before proceeding, thoroughly inspect the wiring harness and connectors between the Horn Switch for a short to ground or to any other circuit.


Measure the resistance between the (X3) Horn Switch Sense circuit at the C5 connector to the Radio Control Return.

Is the resistance below 5.0 ohms?

Yes
  • Replace the Horn Switch in accordance with the Service Information.


No

3. CLOCKSPRING



Disconnect the Steering Control Module C2 connector.
With the scan tool, erase CCN DTCs.
Wait 1 minute.
With the scan tool, read CCN DTCs.

Does the scan tool display active DTC B2339 - HORN SWITCH STUCK?

Yes


No

4. (X3) HORN SWITCH SIGNAL CIRCUIT SHORT TO GROUND



Disconnect the Cluster C3 connector.
Measure the resistance between ground and the (X3) Horn Switch circuit.

Is the resistance below 5.0 ohms?

Yes


No

TIPM-B2371-HORN CONTROL CIRCUIT OVERCURRENT





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    With the ignition on. Battery voltage greater than 10.4 volts.

  • Set Condition:

    An overcurrent condition in the (X21)/(X22) Horn Control Output circuit.


Possible Causes
  
TERMINAL DAMAGE OR CORROSION
  
(X21) HORN CONTROL OUTPUT CIRCUIT HIGH RESISTANCE
  
(X22) HORN CONTROL OUTPUT CIRCUIT HIGH RESISTANCE (EXPORT)
  
HORN CASE GROUND
  
TOTALLY INTEGRATED POWER MODULE
  



Diagnostic Test

1. CHECK FOR ACTIVE DTC B2371 HORN CONTROL CIRCUIT OVERCURRENT

Turn the ignition on.
With the scan tool, record and erase DTC's.
Operate the Horn Switch several times.
With the scan tool, read DTC's.

Does the scan tool display active DTC B2371-HORN CONTROL CIRCUIT OVERCURRENT?

Yes


No

2. VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION

Turn the ignition off.
Inspect the following connector terminal condition. Check for signs of corrosion build up or damage that would compromise the terminal to controller pin connector.

NOTE: Make sure that all in-line connectors are inspected for corrosion and/or damage.


Disconnect the Horn connectors.
Disconnect the C11 TIPM harness connector.
Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.

Were any of the above conditions found?

Yes


No

3. (X21)/(X22) HORN CONTROL OUTPUT CIRCUIT HIGH RESISTANCE



With a jumper wire, connect one end to the (X21) Horn Control Output circuit at the Horn connector and the other to a clean chassis ground.
Using a 12-volt test light to battery voltage, probe the (X21) Control Output circuit in the C11 TIPM harness connector.

NOTE: Cavity 8 at the C11 TIPM harness connector is for export vehicles only.


NOTE: If this is an export vehicle, follow the previous steps for the (X22) Horn Control Circuit also.


NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.



Does the test light illuminate brightly?

Yes


No

4. CHECKING HORN OPERATION

Turn the ignition off.
Disconnect the horn(s) connector(s) if not disconnected.
Momentarily jumper 12-volts to the horn(s).

Did the horn(s) operate properly?

Yes


No

5. CASE GROUND CIRCUIT OPEN

Using a 12-volt test light connected to 12-volts, check for a good case ground at the horn(s) case.

Does the test light illuminate brightly?

Yes


No

6. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.


Using the schematics as a guide, inspect the wire harness and connectors.
Pay particular attention to all Power and Ground circuits.

Were any problems found?

Yes


No