U1180

DTC U1180: Combination Meter Time-Out

CAUTION:
- If the ECM output the DTC U1180, make sure to diagnose the CAN bus line.
- Before replacing the ECU, make sure that the communication circuit is operating normally.

DESCRIPTIONS OF MONITOR METHODS
There is no data from combination meter for the specified time. (combination meter also detect communication error with ECM.)

MONITOR EXECUTION
- Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
- Not applicable

Sensor (The sensor below is determined to be normal)
- Not applicable

DTC SET CONDITIONS

Logic Flow Chart:

Logic Flow Chart

Check Conditions
- After 4 seconds have passed since the ignition switch was turned to "ON" position.
- Battery positive voltage is between 10 and 16.5 volts.

Judgement Criterion
- The communication between the Meter-ECU and the ETACS-ECU has been down through the CAN bus line for 4 seconds.

OBD-II DRIVE CYCLE PATTERN
None.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- CAN line harness damage or connector damage.

DIAGNOSIS

Required Special Tools:
- MB991958: Scan tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A




STEP 1. Using scan tool MB991958, diagnose CAN bus line.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting san tool MB991958.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Diagnose CAN bus line.
4. Turn the ignition switch the "LOCK" (OFF) position.

Q: Is the CAN bus line normal?

YES: It can be assumed that this malfunction is intermittent.

NO: Repair the CAN bus line. Refer to Can bus Diagnostics Table. Then go to Step 2.

STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC U1180 set?

YES: Retry the troubleshooting.

NO: The inspection is complete.