Lancer LS L4-2.0L SOHC (2002)
TROUBLESHOOTING HINTS
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Malfunction of the power window switch (door lock switch)
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Malfunction of the ETACS-ECU
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Damaged harness wires or connectors
DIAGNOSIS
Required Special Tools:
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MB991223: Test Harness Set
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MB991502: Scan Tool (MUT-II)
Check the input signal (by using the Pulse check).
Check the input signals from the door lock switch:
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. When the driver's or the front passenger's door lock switch is moved from "LOCK" to "UNLOCK" or vice versa, check if scan tool MB991502
sounds or not.
Q: Does scan tool MB991502 sound when the driver's or the front passenger's door lock switch is moved from "LOCK" to "UNLOCK" or vice
versa?
YES: Replace the ETACS-ECU. All the doors should be locked and unlocked by the door lock switch.
NO: Refer to Inspection Procedure M-7 "ETACS-ECU does not receive a signal from the door lock switch (incorporated in the power window
main switch)."
Inspection Procedure C-4
Central Door Locking System: All the Doors do not Lock or Unlock with just the Door Lock Key Cylinder Key Operation