Can Communication Control
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN communication recovers normally, it also returns to normal control.
If no CAN communication is available with ECM
FAIL-SAFE OPERATION CHART
| Control part |
Fail-safe in operation |
| Cooling fan |
- The cooling fan relay-1, the cooling fan relay-2, the cooling fan relay-3 and the cooling fan relay-5 turn ON when the ignition switch is turned ON
- The cooling fan relay-1, the cooling fan relay-2, the cooling fan relay-3 and the cooling fan relay-5 turn OFF when the ignition switch is turned OFF
- Cooling fan relay-4 OFF
|
| A/C compressor |
A/C relay OFF |
If no CAN communication is available with BCM
FAIL-SAFE OPERATION CHART
| Control part |
Fail-safe in operation |
| Headlamp |
- The headlamp low relay turns ON when the ignition switch is turned ON
- The headlamp low relay turns OFF when the ignition switch is turned OFF
- Headlamp high relay OFF
|
- Parking lamps
- License plate lamps
- Tail lamps
- Illuminations
|
- The tail lamp relay and the daytime running light relay turn ON when the ignition switch is turned ON
- The tail lamp relay and the daytime running light relay turn OFF when the ignition switch is turned OFF
|
| Front wiper |
- The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF while the front wiper is operating at LO or HI speed.
- The front wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control is activated while the front wiper is set in the INT mode and the front wiper motor is operating.
|
| Front fog lamps |
Front fog lamp relay OFF |
| Starter motor |
Starter relay OFF |
| Rear window defogger |
Rear window defogger relay OFF |
| Horn |
Horn relay OFF |