B2222
DTC B2222: Radio receiver internal failCAUTION:
- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, always diagnose the CAN bus lines.
- Before replacing the satellite radio tuner, be sure to check that the power supply circuit, ground circuit, and communication circuit are normal.
TROUBLE JUDGMENT
When the ignition switch is ON and the system voltage is from 10 V to 16 V (data from ETACS-ECU), if the satellite radio tuner receives abnormal status by signal conditioning 10 times consecutively, DTC B2222 is stored.
COMMENTS ON TROUBLE SYMPTOM
The satellite radio tuner or CAN bus line may have a problem.
PROBABLE CAUSES
- Malfunctions of satellite radio tuner
- Malfunction of CAN bus line wiring harness and connector
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.
Use scan tool MB991958 to diagnose the CAN bus lines.
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.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to "ON" position.
3. Diagnose the CAN bus line.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the CAN bus line. On completion, go to Step 2.
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set to the satellite radio tuner.
1. Erase the DTC.
2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
3. Check if the DTC is set.
Q: Is the DTC set?
YES : Replace the satellite radio tuner.
NO : The trouble can be an intermittent malfunction.