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Home >> Chrysler >> 2003 >> Sebring Coupe V6-3.0L VIN H >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Diagnosis By Symptom >> Symptom Procedures >> Inspection Procedure O-3

Inspection Procedure O-3


INSPECTION PROCEDURE O-3: The key reminder switch signal is not sent to the ETACS-ECU.






CIRCUIT OPERATION
The ETACS-ECU operates various functions according to the input signal from the key reminder switch.

TECHNICAL DESCRIPTION (COMMENT)
The key reminder switch input signal is used to operate the following functions or system:
- Ignition key reminder tone alarm function
- Forgotten key prevention function
- Keyless entry system
- Interior lights dimming function
- Theft-alarm system
If the signal fails, these functions or system will not work normally.

TROUBLESHOOTING HINTS
- The key reminder switch may be defective
- The ETACS-ECU may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS
Required Special Tools:
- MB991223: Test Harness Set
- MB991502: Scan Tool (MUT-II)
- MB991529: Diagnostic Trouble Code Check Harness




STEP 1. Check the key reminder switch.
Disconnect key reminder switch connector C-201. Then check the continuity.

Q: Is the key reminder switch in good condition?

YES : Go to Step 2.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. The key reminder switch input signal should be able to be checked and the functions, which are described in the Technical Description (comment),' should work normally.

STEP 2. Check the ground circuit to the key reminder switch. Test at key reminder switch connector C-201.




1. Disconnect the key reminder switch connector C-201 and measure the resistance available at the wiring harness side of the connector.




2. Measure the resistance between terminal 4 and ground.
- The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 5.

NO : Go to Step 3.




STEP 3. Check the key reminder switch connector C-201 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is key reminder switch connector C-201 in good condition?

YES : Go to Step 4.

NO : Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Diagnostic AidsThe key reminder switch input signal should be able to be checked and the functions, which are described in the 'Technical Description (comment),' should work normally.




STEP 4. Check the wiring harness between key reminder switch connector C-201 (terminal 4) and ground.

Q: Is the wiring harness between key reminder switch connector C-201 (terminal 4) and ground in good condition?

YES : No action is necessary and testing is complete.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. The key reminder switch input signal should be able to be checked and the functions, which are described in the 'Technical Description (comment),' should work normally.







STEP 5. Check the key reminder switch connector C-201 and ETACS-ECU connector C-317 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are key reminder switch connector C-201 and ETACS-ECU connector C-317 in good condition?

YES : Go to Step 6.

NO : Repair or replace the damaged components). Refer to Harness Connector Inspection. Diagnostic AidsThe key reminder switch input signal should be able to be checked and the functions, which are described in the Technical Description (comment),' should work normally.







STEP 6. Check the wiring harness between key reminder switch connector C-201 (terminal 6) and ETACS-ECU connector C-317 (terminal 30).

Q: Is the wiring harness between key reminder switch connector C-201 (terminal 6) and ETACS-ECU connector C-317 (terminal 30) in good condition?

YES : Go to Step 7.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. The key reminder switch input signal should be able to be checked and the functions, which are described in the 'Technical Description (comment),' should work normally.

STEP 7. Check for the continuity between key reminder switch connector C-201 terminals 4 and 6.




1. Disconnect key reminder switch connector C-201 and measure the resistance available at the equipment side of the connector.
2. No continuity should exist between key reminder switch connector terminal 4 and each other terminals (except terminal 6), and key reminder switch connector terminal 6 and each other terminals (except terminal.)

Q: Does the continuity exist?

YES : Replace the ETACS-ECU. The key reminder switch input signal should be able to be checked and the functions, which are described in the 'Technical Description (comment),' should work normally.

NO : Replace the key reminder switch. The key reminder switch input signal should be able to be checked and the functions, which are described in the 'Technical Description (comment),' should work normally.






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