Simplified Fault Diagnostic Mode
This diagnostic has 3 modes and can be switched by operating the ignition or other switches (i.e. headlight, power door lock, wiper, etc.). To reconfirm a code, it is necessary to switch to another mode and start again. To return to normal mode, turn ignition off and disconnect scan tool.
The following are the 3 simplified fault diagnostic modes:
- Switch Diagnostic Mode
Ignition in ACC or OFF position. This mode will confirm/check switch input signal to each ECU in the multiplex control system. Switch input signal is normal when a particular switch is operated in this mode and high beam indicator light flashes and buzzer sounds. See Fig 1 .
- Specification Confirmation Mode
Ignition in ON position. This mode displays codes to confirm whether vehicle is equipped with correct ECU. Codes are displayed/flashed on high beam indicator light. See SPECIFICATION CODE IDENTIFICATION table.
| Code | Applicable ECU | |||
|---|---|---|---|---|
| Vehicles W/RKE (1) | ||||
| 13 | Instrument Panel ECU | |||
| 23 | ETACS-ECU | |||
| 33 | Assist-ECU | |||
| 43 | Left Front Door Module | |||
| 52 | Memory Power Seat ECU | |||
| Vehicles W/O RKE (1) | ||||
| 13 | Instrument Panel ECU | |||
| 23 | ETACS-ECU | |||
| 38 | Assist-ECU | |||
| 48 | Left Front Door Module | |||
| 52 | Memory Power Seat ECU | |||
|
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- DTC Output Mode
Displays multiplex control system related trouble codes. See SELF-DIAGNOSTICS CODE IDENTIFICATION table.
| Code | Probable Cause |
|---|---|
| 11 | Disconnected Instrument Panel Or Instrument Panel ECU Connector |
| 12 | Disconnected Instrument Panel & Dash Connector |
| 21 | Disconnected Instrument Panel Front Harness Connector |
| 23 | Disconnected Dash Harness Front Harness Connector |
| 25 | Faulty Fuse (No. 6) To ETACS-ECU Ignition ACC Power |
| 26 | Faulty Fuse No. 12 (IG1) |
| 27 | Faulty Fuse No. 15 (IG2) |
| 28 | Faulty Fuse No. 9 (IG2) |
| 29 | ETACS-ECU Malfunction |
| 31 | Disconnected Control & Front Harness Connector |
| 32 | Generator Fuse Open (Fuse No. 8) |
| 33 | MFI Fuse Open (Fuse No. 9) |
| 34 | Assist-ECU Malfunction |
| 35 | Passenger Door Mirror Motor Fault |
| 41 | Front Door Module Malfunction |
| 42 | Left Side Door Mirror Fault |
| 51 | Memory Power Seat ECU Fault |
| 52 | Seat Slide Motor Fault |
| 53 | Seat Rear Height Motor Fault |
| 54 | Seat Front Height Motor Fault |
| 55 | Seat Reclining Motor Fault |