
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
| - Outputs the pulse duty signal (PWM signal) 100% when the ignition switch is turned ON
- Outputs the pulse duty signal (PWM signal) 0% when the ignition switch is turned OFF
|
A/C compressor
| A/C relay OFF
|

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 marker lamps
- Illuminations
- Tail lamps
| - Turns ON the tail lamp relay and daytime running light relay* when the ignition switch is turned ON
- Turns OFF the tail lamp relay and daytime running light 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 mode and the front wiper motor is operating.
|
Horn
| Horn OFF
|
Ignition relay
| The status just before activation of fail-safe is maintained.
|
Starter motor
| Starter control relay OFF
|
Steering lock unit
| Steering lock relay OFF
|
*: With daytime running light system

IGNITION RELAY MALFUNCTION DETECTION FUNCTION
- IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
- IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation coil circuit.
- If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay and daytime running light relay* for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
Voltage judgment
|
IPDM E/R judgment
|
Operation
|
Ignition relay contact side
|
Ignition relay excitation coil side
|
ON
|
ON
|
Ignition relay ON normal
|
—
|
OFF
|
OFF
|
Ignition relay OFF normal
|
—
|
ON
|
OFF
|
Ignition relay ON stuck
|
- Detects DTC “B2098: IGN RELAY ON”
- Turns ON the tail lamp relay and daytime running light relay* for 10 minutes
|
OFF
|
ON
|
Ignition relay OFF stuck
|
Detects DTC “B2099: IGN RELAY OFF”
|
*: With daytime running light system

FRONT WIPER CONTROL
IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper after repeating a front wiper 10 seconds activation and 20 seconds stop five times.
Ignition switch
| Front wiper switch
| Front wiper stop position signal
|
ON
| OFF
| The front wiper stop position signal (stop position) cannot be input for 10 seconds.
|
ON
| The front wiper stop position signal does not change for 10 seconds.
|
NOTE:
This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item “WIP PROT” while the wiper is stopped.

STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains active for 90 seconds.