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 the 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 |
|
| OFF | ON | Ignition Relay OFF Stuck | Detects DTC "B2099: IGN RELAY OFF" |
* : With daytime running light system