INSPECTION PROCEDURE 6: The windshield intermittent wiper interval is not changed according to the vehicle speed: Diagnosis
WARNING: This page is about a different variant/trim than selected.
Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
- STEP 1. Retest the system.
Check that the windshield intermittent wiper interval can be adjusted by operating the windshield intermittent wiper interval control switch.
Q: Is the check result normal?
- STEP 2. Check the ETACS customization function.
Use the ETACS customization function to check that "Front wiper operation" is set to "Variable INT" or "Speed sensitive".
Q: Is the check result normal?
- YES: Go to Step 3.
- NO: Use the ETACS customization function to set "Front wiper operation" to "variable INT" or "Speed sensitive". (Refer to CUSTOMIZATION FUNCTION .)
- STEP 3. Using scan tool MB991958, check data list.
Check the input signal related to the combination meter.
- Drive the vehicle and change vehicle speed.SCAN TOOL DISPLAY CHART
Item No. Display on scan tool Check condition Normal condition Item 80 speedometer Speedometer and scan tool displays meet Q: Is the check result normal?
- YES: Go to Step 4.
- NO <Normal condition is not displayed for item No. 80.>: Troubleshoot the speedometer (Refer to INSPECTION PROCEDURE 2: "THE SPEEDOMETER DOES NOT WORK (THE OTHER METERS WORK)." )
- Drive the vehicle and change vehicle speed.
- STEP 4. Retest the system.
Check that the intermittent wiper interval depends on the vehicle speed.
Q: Is the check result normal?
- YES: Intermittent malfunction. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
- NO: Replace the ETACS-ECU.