BCM
BCM : Diagnosis Procedure
1. CHECK FUSE AND FUSIBLE LINK
Check if the following BCM fuses or fusible link are blown.

2. CHECK POWER SUPPLY CIRCUIT

3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground

BCM : Special Repair Requirement
1. REQUIRED WORK WHEN REPLACING BCM
Initialize control unit.
Battery saver output/power supply circuitP0507 ISC system
Description
The ECM controls the engine idle speed to a specified level via the fine
adjustment of the air, which is let into
the intake manifold, by operating the electric throttle control actuator. The
operating of the throttle valve is varied
to allow for optimum control of the engine id ...
Cooling system
Cooling Circuit
Cylinder block (RH)
Oil cooler
Cylinder head (RH)
Water pump
Radiator
Water inlet
Thermostat
Cylinder head (LH)
Cylinder block (LH)
To heater
To electric throttle control actuator
From heater
From electric throttle control act ...
B2553 ignition relay
Description
BCM turns ON the following relays to ignition power supply to each ECU when
the ignition switch is turned
ON.
Ignition relay-1 (inside IPDM E/R)
Ignition relay-2 (inside fuse block (J/B))
Front blower motor relay
BCM checks any ignition relay ON request for consistency wi ...