Lancer Sportback L4-2.4L (4B12) (2010)
Key Reminder Switch Input Circuit
COMMENTS ON TROUBLE SYMPTOM
The key reminder switch input signal is used for the operation judgment of the functions below. If the signal is abnormal, these functions will not work.
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Ignition key reminder function
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Central door locking
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Keyless entry system
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KOS
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Ignition key cylinder illumination light
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Interior light
TROUBLESHOOTING HINTS
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The key reminder switch may be defective
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The ETACS-ECU may be defective
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB992006: Extra Fine Probe
STEP 1. Check key reminder switch connector C-213 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is key reminder switch connector C-213 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Check that the input signal of key reminder switch is normal.
STEP 2. Check the key reminder switch.
Disconnect key reminder switch connector C-213. Then check continuity between terminals.
Q: Is the key reminder switch in good condition?
YES : Go to Step 3.
NO : Replace the key reminder switch. Check that the input signal of key reminder switch is normal.
STEP 3. Check the ground circuit to the key reminder switch. Measure the resistance at key reminder switch connector C-213.
1. Disconnect key reminder switch connector C-213 and measure the resistance available at the wiring harness side of the connector.