PCM-BCM (H27 engine with A/T model only) and BCM-METER Signal Circuit Construction: Description
WARNING: This page is about a different car, the 2003 Suzuki XL-7 and 2003 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
- PCM-BCM signal (H27 engine with A/T model only) is a voltage signal (0-12 volts) which is outputted from PCM to BCM through the signal circuit, based on A/T selector position signal, O/D OFF switch position signal and A/T mode switch position signal from each switches.
- BCM-METER signal is a voltage signal (0-12 volts) which is outputted from BCM to combination meter through the signal circuit, based on charging system warning signal, DRL indicator signal, Brake indicator signal, windshield washer level switch signal, light switch cognition, A/T selector position signal (H27 engine with A/T model only), O/D OFF switch position signal (H27 engine with A/T model only) and A/T mode switch position signal (H27 engine with A/T model only) from each switches and controller.
- CPU in combination meter operates charging system warning indicator, DRL indicator, Brake indicator, washer level indicator, A/T selector position indicator (H27 engine with A/T model only), O/D OFF indicator (H27 engine with A/T model only) and POWER indicator (H27 engine with A/T model only) by analyzing BCM-METER signal.
- If CPU in combination meter detects a malfunction of PCM-BCM signal, it makes each lights in combination meter turn OFF or flashing at the same time as follows when ignition switch is turned to ON position and warn the driver of such occurrence of trouble.
- O/D OFF indicator light keep flashing.
- All A/T selector position indicators turn OFF.
- POWER indicator turns OFF.
- If CPU in combination meter detects a malfunction of BCM-METER signal, it makes each lights in combination meter turn OFF or flashing at the same time as follows when ignition switch is turned to ON position and warn the driver of such occurrence of trouble.
- Charging system warning indicator keep flashing
- DRL indicator keep flashing
- Brake indicator keep flashing
- Washer level indicator keep flashing
- O/D OFF indicator light keep flashing (H27 engine with A/T model only)
- All A/T selector position indicators turn OFF (H27 engine with A/T model only)
- POWER indicator turns OFF (H27 engine with A/T model only)