On-Board Diagnostic (OBD) Test Description

AIR CONDITIONER SYSTEM ON-BOARD DIAGNOSTIC (OBD)

1. The OBD function in the A/C amplifier locates and indicates malfunctions in the control system.

2. The OBD function has 3 steps.
- Present diagnostic test mode
- Electrical faults presently occurring in the control system are detected and indicated as DTC.
- Past diagnostic test mode
- Electrical faults that previously occurred in the control system (intermittent problems) are detected and indicated as DTC.
- Output device operation check mode
- All output devices are made to operate individually according to a designated pattern.

3. The OBD function works as shown below. To turn off the OBD function, turn off the ignition switch.

Operation Flow:

Operation flow