Montero Sport XS 2WD V6-3.5L SOHC (2001)
Inspection Procedure 3
The ignition Key Hole Illumination Light does not Go out when the Ignition Key is Turned to the "ON" Position. (However, it Goes out after 15
Seconds.) The ignition key Reminder Tone Alarm does not Stop Sounding When the Ignition Key is Turned to the "ON" Position (The Tone
Alarm stops Sounding by Closing the Driver's Door.)
CIRCUIT OPERATION
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The ETACS-ECU monitors the ignition switch by detecting voltage from the ignition switch.
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The ETACS-ECU judges that the driver's side door is opened or closed by detecting voltage from the front door switch (LH).
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When the driver's door is opened (door switch on), the ignition key hole illumination light will illuminate. When the driver's door is closed (door
switch off), the ignition key hole illumination light will go out within 15 seconds.
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When the driver's door is opened without removing the ignition key, the tone alarm will sound intermittently to remind that the ignition key has not
been removed.
TECHNICAL DESCRIPTION (COMMENT)
The input signal from the ignition switch may be defective, or the ETACS-ECU may be defective. If the multi-purpose fuse is blown, the harness may be
short circuited.
TROUBLESHOOTING HINTS
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Damaged harness wire or connector
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Malfunction of the ETACS-ECU
DIAGNOSIS
Required Special Tools:
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MB991529: Diagnostic Trouble Code Check Harness
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MB991502: Scan Tool (MUT-II)
STEP 1. Check the input signal from the ignition switch (by using scan tool MB991502).
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or
disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Check that the tone alarm of the scan tool MB991502 sounds when the ignition key is moved from the "LOCK" position to the "ON" position.
Q: Does the tone alarm of scan tool MB991502 sound when the input signal enters?
YES: Replace the ETACS-ECU. Check that the malfunctions eliminated.
NO: Go to Step 3.
