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.