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
| Control part |
Fail-safe operation |
| Cooling fan |
- Turns ON the cooling fan relay-2 and the cooling fan relay-3 when ignition switch is turned ON (Cooling fan operates at HI)
- Turns OFF the cooling fan relay-1, the cooling fan relay-2 and the cooling fan relay-3 when the ignition switch is turned OFF (Cooling fan does not operate)
|
| A/C compressor |
A/C relay OFF |
| Alternator |
Outputs the power generation command signal (PWM signal) 0% |
If No CAN Communication Is Available With BCM
| Control part |
Fail-safe operation |
| Headlamp |
- Turns ON the headlamp low relay when the ignition switch is turned ON
- Turns OFF the headlamp low relay when the ignition switch is turned OFF
- Headlamp high relay OFF
|
- Parking lamps
- License plate lamps
- Side maker lamps
- Illuminations
- Tail lamps
|
- Turns ON the tail lamp relay when the ignition switch is turned ON
- Turns OFF the tail lamp relay 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 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/AUTO mode and the front wiper motor is operating.
|
| Front fog lamps |
Front fog lamp relay OFF |
| Horn |
Horn OFF |
| Ignition relay |
The status just before activation of fail-safe is maintained. |
| Starter motor |
Starter control relay OFF |