Mode I (LAN Communication)
- This mode checks the communication between the Body Control Module (BCM) and each Local Control Unit (LCU). If a malfunction is detected, self-diagnostic indicator lights will flash a 2-digit trouble code. See LAN COMMUNICATION TROUBLE CODES table.
- To enter on-board diagnostic Mode I, turn ignition off. Set headlight switch and rear window defogger switch in OFF position. Ensure all doors are closed. Set interior light switch in "O" position.
- Turn ignition on and then off. Repeatedly press rear defogger switch more than 10 times in 10 seconds and then hold switch in the OFF position. Self-diagnostic indicator lights should come on. Turn ignition switch to ON position within 5 seconds after self-diagnostic indicator lights come on.
- Indicator lights should go off and then within one second, system should begin on-board diagnostic Mode I. After indicator lights come on for 2 seconds and then go off for 2 seconds, it will start flashing any communication-related trouble codes present in system.
- The first and second digits of the trouble code are flashed separately. Code will be flashed in 5-second intervals. Count the number of flashes to identify trouble code. A one-second pause separates the first and second digits of trouble code. See Fig 1 .
- Record trouble codes, and repair the faulty circuits using appropriate LAN COMMUNICATION DIAGNOSTICS under DIAGNOSTIC CHARTS . See Figure . To exit diagnostic mode, turn ignition off.
LAN COMMUNICATION TROUBLE CODES
| Trouble Codes | LCU No. | Failure Description |
|---|---|---|
| 11 | --- | None |
| 24 | 01 (Driver's Door Control) | Communication Malfunctions |
| 25 | 01 (Driver's Door Control) | Data Line A - No Response |
| 26 | 01 (Driver's Door Control) | Data Line B - No Response |
| 34 | 02 (Passenger's Door Control) | Communication Malfunctions |
| 35 | 02 (Passenger's Door Control) | Data Line A - No Response |
| 36 | 02 (Passenger's Door Control) | Data Line B - No Response |
| 41 | 03 (Right Rear Door Control) | Communication Malfunctions |
| 42 | 03 (Right Rear Door Control) | Data Line A - No Response |
| 43 | 03 (Right Rear Door Control) | Data Line B - No Response |
| 44 | 04 (Left Rear Door Control) | Communication Malfunctions |
| 45 | 04 (Left Rear Door Control) | Data Line A - No Response |
| 46 | 04 (Left Rear Door Control) | Data Line B - No Response |
| 54 | 05 (Multi-Remote System Control) | Communication Malfunctions |
| 55 | 05 (Multi-Remote System Control) | Data Line A - No Response |
| 56 | 05 (Multi-Remote System Control) | Data Line B - No Response |