Eclipse L4-2.4L SOHC (2004)
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MB991812: SWS monitor harness (for column-ECU)
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MB991922: Probe harness
STEP 1. Use scan tool MB991958 to select "ECU COMM Check" on the SWS monitor display.
Check the following ECUs:
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Column-ECU
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Front-ECU
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 special tool MB991911 before connecting special tool MB991812. Be sure to connect special tool
MB991806 after turning on special tool MB991824.
1. Connect the special tool. Refer to "How to connect SWS monitor." See: Reading and Clearing Diagnostic Trouble Codes/How to Connect SWS
Monitor
2. Turn the ignition switch to the "LOCK" (OFF) position.
3. Operate scan tool MB991958 according to the procedure below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System Select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."
4. Scan tool MB991958 should show "OK" on the "ECU COMM Check" menus for both the "COLUMN ECU" and "FRONT ECU" menus.
Q: Are "OK" displayed on the "COLUMN ECU" and "FRONT ECU" menu?
"OK" are displayed for all the items: Go to Step 2.
"NG" is displayed on the "COLUMN ECU" menu: Refer to Inspection Procedure A-2 "Communication with column switch (column-ECU) is
impossible."
