Keyless Operation System (KOS)
DTC U0195: Satellite radio tuner CAN time-out
CAUTION:
- If DTC U0195 is set to the ETACS-ECU, always diagnose the CAN bus line.
- Before replacing the ECU, ensure that the communication circuit is normal.
TROUBLE JUDGMENT
If the signal from satellite radio tuner cannot be received, the KOS-ECU sets DTC U0195.
TROUBLESHOOTING HINTS
- The satellite radio tuner may be defective.
- The KOS-ECU may be defective.
- The CAN bus may be defective.
DIAGNOSIS
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
(1)
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III) Reading and Clearing Diagnostic Trouble Codes."
(2)Turn the ignition switch to the "ON" position.
(3)Diagnose the CAN bus line.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q. Is the CAN bus line found to be normal?
YES Go to Step 2.
NO Repair the CAN bus line CAN Bus Diagnostics Chart).
STEP 2. Using scan tool MB991958, read the satellite radio tuner diagnostic trouble code.
Check if DTC is set to the satellite radio tuner.
Q. Is the DTC set?
YES Troubleshoot the satellite radio. NO Go to Step 3.
STEP 3. Using scan tool MB991958, read the other system diagnostic trouble code.
Check if DTC U0195 is set to the combination meter.
Q. Is the DTC set?
YES Go to Step 4.
NO Go to Step 5.
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1)Erase the DTC.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if DTC is set.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q. Is the DTC set?
YES Replace the satellite radio tuner.
NO The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1)Erase the DTC.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if DTC is set.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q. Is the DTC set?
YES Replace KOS-ECU and register the ID codes. (Refer to ID Code Registration Judgment Table.)
NO The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).