BCM Power Supply and Ground Circuit Check
WARNING: This page is about a different car, the 2006 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FUSE AND FUSIBLE LINK
Check the following BCM fuses and fusible link.
FUSE AND FUSIBLE LINK SPECIFICATIONComponent Parts Terminal No. (SIGNAL) Ampere No. Location BCM 57 (BAT power supply) 15A 22 Fuse block (J/B) 70 (BAT power supply) 50A f Fuse and fusible link box 11 (ACC power supply) 10A 4 Fuse block (J/B) 38 (IGN power supply) 10A 59 Fuse and relay box NOTE: Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".OK or NG
- OK : GO TO 2.
- NG : If fuse is blown, be sure to eliminate cause of problem before installing new fuse, refer to "POWER SUPPLY ROUTING CIRCUIT ".
- CHECK POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect BCM.
- Check voltage between BCM connectors M18, M20 terminals 11, 38, 57, 70 and ground.TERMINALS VOLTAGE CHART
Connector Terminals Signal name Ignition switch Voltage (+) (-) M20 70 Ground Battery power supply OFF Battery voltage 57 Battery power supply OFF Battery voltage M18 11 ACC power supply ACC Battery voltage 38 IGN power supply ON Battery voltage
OK or NG
- OK : GO TO 3.
- NG : Repair or replace harness.
- CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and ground.
TERMINALS CONTINUITY CHARTConnector Terminals Continuity (+) (-) M20 67 Ground Yes OK or NG
- OK : Power supply and ground circuit is OK.
- NG : Repair or replace harness.