2007 Compass Patriot MK Factory Service Manual 8 - ELECTRICAL

U0126-LOST COMMUNICATION WITH STEERING ANGLE SENSOR (SAS)





For a complete wiring diagram Refer to Section 8W.



Possible Causes
  
CAN C BUS CIRCUITS OPEN OR SHORTED
  
DTC'S RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
  
STEERING ANGLE SENSOR
  
STEERING ANGLE SENSOR POWER AND GROUND
  
TIPM NOT CONFIGURED CORRECTLY
  
MODULE THAT SET THIS DTC
  



Diagnostic Test

1. VERIFY DTC IS ACTIVE

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.


Turn the ignition on.
With the scan tool, read active DTC's.

Is this DTC active?

Yes


No

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S

With the scan tool, read all active DTC's from all CAN C Bus modules.

NOTE: Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTC's.



Does the scan tool display any active DTC's to the conditions listed above?

Yes


No

3. VERIFY THAT THE SAS IS ACTIVE ON THE BUS

With the scan tool, select ECU View.
Verify that the SAS is active on the bus.

Is the SAS active on the bus?

Yes


No

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC'S

With the scan tool, select Network View and select Advanced.

Is there more than one module with active DTC's “Logged Against” the SAS?

Yes


No