SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-397
STEP 4. Check the input signal (by using the pulse check
mode of the monitor).
Check the following switches and input signals:
• Door switches
(1) Operate diagnostic tool MB991958 according to the
procedure below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."
(2) Check if diagnostic tool MB991958 sounds or not.
Q: When any door switch is operated, does diagnostic tool
MB991958 sound?
YES : Go to Step 5.
NO : Refer to Inspection Procedure N-3 "ETACS-ECU
does not receive any signal from any of the door
switches
P.54B-440
."
STEP 5. Replace the combination meter.
(1) Replace the combination meter.
(2) Check that the door ajar indicator lamp illuminates normally.
Q: Is the door ajar indicator lamp in good condition?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. Check that the door ajar
indicator lamp illuminates normally.
ITEM NAME
CONDITION
door switches
Open or close one of the doors
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827