IS 250C V6-2.5L (4GR-FSE) (2011)
Engine Control Module: Component Tests and General Diagnostics
4GR-FSE ENGINE CONTROL: SFI SYSTEM: ECM Power Source Circuit
- ECM Power Source Circuit
DESCRIPTION
When the engine switch is turned on (IG), battery voltage is applied to terminal IGSW of the ECM. The ECM MREL output signal causes current to
flow to the coil, closing the contacts of the integration relay (EFI MAIN relay) and supplying power to terminal +B and +B1 of the ECM.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. INSPECT ECM (+B, +B1 VOLTAGE)
(a) Turn the engine switch on (IG).
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage: