INSPECTION PROCEDURE F-3: Sunroof: Sunroof timer function does not work normally.: Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

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

STEP 1. Check method of the input signal.
Q: Which is to be used, the scan tool or a voltmeter to check the input signal?

Scan tool MB991502 : Go to Step 2.

Voltmeter : Go to Step 3.
STEP 2. Check the input signal (by using the scan tool MB991502).
Check the input signals from the following switches:
- Ignition switch (IG1)
- Driver's and passenger's door switch
- Sunroof switch
  NOTE: If can be determined whether the wiring harness between the sunroof motor assembly and the ETACS-ECU is defective or not by checking the SWS communication line.
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 scan tool MB991502 sounds when the input signal enters.
Q: Does the tone alarm of scan tool MB991502 sound when the input signal enters?

YES : Replace the sunroof motor assembly. The sunroof timer function should work normally.

NO:
- Scan tool MB991502 does not sound when the ignition switch is turned from "ACC" to "ON": Refer to INSPECTION PROCEDURE O-2 "THE IGNITION SWITCH (IG1) SIGNAL IS NOT SENT TO THE ETACS-ECU ."
  
  Fig 1: Connecting Scan Tool MB991502 To Data Link Connector
  Courtesy of DAIMLERCHRYSLER CORPORATION
- Scan tool MB991502 does not sound when the driver's or passenger's door is opened: Refer to INSPECTION PROCEDURE O-8 "THE DRIVER'S OR PASSENGER'S DOOR SWITCH SIGNAL IS NOT SENT TO THE ETACS-ECU ."
- Scan tool MB991502 does not sound when the sunroof switch is turned from "OFF" to "OPEN/TILT UP" or "CLOSE/TILT DOWN": Refer to INSPECTION PROCEDURE O-18 "THE OPEN/TILT UP OR CLOSE/TILT DOWN SWITCH SIGNAL IS NOT SENT TO THE ETACS-ECU ."
STEP 3. Check the input signal (by using a voltmeter).
Check the input signals from the following switches:
- Ignition switch (IG1)
- Driver's and passenger's door switch
- Sunroof switch
  NOTE: It can be determined whether the wiring harness between the sunroof motor assembly and the ETACS-ECU is defective or not by checking the SWS communication line.
1. Use special tool MB991529 to connect a voltmeter between ground terminal 4 or 5 and ETACS-ECU terminal 9 of the data link connector.
2. Check that the voltmeter indicator deflects once when the input signal enters.
Q: Does the voltmeter indicator deflect?

YES : Replace the sunroof motor assembly. The sunroof timer function should work normally.

NO:
- The voltmeter needle does not fluctuate when the ignition switch is turned from "ACC" to "ON": Refer to INSPECTION PROCEDURE O-2 "THE IGNITION SWITCH (IG1) SIGNAL IS NOT SENT TO THE ETACS-ECU ."
  
  Fig 2: Connecting Voltmeter Between Ground Terminal 4 And 5
  Courtesy of DAIMLERCHRYSLER CORPORATION
- The voltmeter needle does not fluctuate when the driver's or passenger's door is opened: Refer to INSPECTION PROCEDURE O-8 "THE DRIVER'S OR PASSENGER'S DOOR SWITCH SIGNAL IS NOT SENT TO THE ETACS-ECU ."
- Scan tool MB991502 does not sound when the sunroof switch is turned from "OFF" to "OPEN/TILT UP" or "CLOSE/TILT DOWN": Refer to INSPECTION PROCEDURE O-18 "THE OPEN/TILT UP OR CLOSE/TILT DOWN SWITCH SIGNAL IS NOT SENT TO THE ETACS-ECU ."