Scan Tool Testing and Procedures

The table shows the service data and their normal condition, which are displayed during the "Data List."

Column ECU:

COLUMN ECU

ETACS:

ETACS

NOTE: For item No.43, the scan tool MB991958 (MUT-III Sub Assembly) also displays "ON" when the light reminder tone alarm or the seat belt tone alarm function is triggered.

Front-ECU, P/W, S/R:

Front-ECU, P/W, S/R

NOTE: For item No.70, the scan tool MB991958 (MUT-III Sub Assembly) also displays "NG" under "ECU COMM Check" when it displays "NO ACK" under the front-ECU check.

NOTE: For item No.72, the scan tool MB991958 (MUT-III Sub Assembly) also displays "NG" under "ECU COMM Check" when it displays "NO ACK" under the sunroof-ECU check.



The table shows the service data and their normal condition, which are displayed during the "Function Diag." The column "Normal condition" shows values, which are shown when each operation is made.

Part 1:

Part 2:

WIPER

Rear Wiper:

REAR WIPER

Part 1:

Part 2:

Part 3:

LIGHTING

NOTE: When checking the input signals (off, tail, low-beam or high-beam), turn the ignition switch to the "ON" position in order to disable the headlight automatic shutdown function. However, the headlight operation does not depend on the ignition switch positions, the scan tool MB991958 (MUT-III Sub Assembly) does not display the title "IGNITION SWITCH".

For checking item "HEADLIGHT HI", the scan tool MB991958 (MUT-III Sub Assembly) displays "OFF" on the item No.2 "DIMMER SW" when the headlights are at high-beam. Therefore, the scan tool MB991958 (MUT-III Sub Assembly) should display "ON" momentarily when the dimmer switch is operated.

Turn Signal:

TURN SIGNAL

Buzzer:

BUZZER

NOTE: The headlight automatic shutdown function works in approximately one second after the lighting monitor tone alarm starts sounding, and then the tone alarm ceases sounding.

Sunroof:

SUNROOF

Theft-Alarm:

THEFT-ALARM