DTC    U0155    Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)

for Preparation Click here


DESCRIPTION

The ECM receives signals sent from the combination meter via the CAN communication system. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding ECU or sensor.

DTC No.
DTC Detection Condition
Trouble Area
U0155
  1. Following conditions are met for 2.9 seconds (1 trip detection logic):
    1. Ignition switch to ON.
    2. Battery voltage is 10.5 V or higher.
    3. There is no communication between the ECM and combination meter.
  1. CAN communication system
  2. Combination meter
  3. ECM

MONITOR STRATEGY


Related DTCs
U0155: Verify communication
Required Sensors/Components (Main)
ECM
Required Sensors/Components (Related)
-
Frequency of Operation
Continuous
Duration
2.9 seconds
MIL Operation
Immediate
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


Monitor runs whenever following DTCs are not present
None
Battery Voltage
10.5 V or higher
Ignition switch
ON
Starter
OFF

TYPICAL MALFUNCTION THRESHOLDS


Communication signal
Lost communication with combination meter

CONFIRMATION DRIVING PATTERN


A199238E81

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (Click here).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on [A].
  6. Wait 5 seconds or more.
  7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  8. Read the DTCs [B].

    HINT:
    1. If a DTC is output, the system is malfunctioning.
    2. If a DTC is not output, perform the following procedure.
  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  10. Input the DTC: U0155.
  11. Check the DTC judgment result.

    Techstream Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    HINT:
    If the judgment result shows ABNORMAL, the system has a malfunction.
  12. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs (Click here).

    HINT:
    1. If a permanent DTC is output, the system is malfunctioning.
    2. If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

1.CHECK DTC OUTPUT (DTC U0155)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON and turn the Techstream on.

  1. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

  1. Read DTCs.

    Result 
    Result
    		Proceed to
    No output
    		A
    U0155
    		B


B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A

CHECK FOR INTERMITTENT PROBLEMS (Click here)