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.