Code 41

This is the power source for the ECU and becomes power source for the CPU and actuators.

CODE 41 CIRCUIT DESCRIPTION

Code	Diagnostic Code Detecting Condition	Trouble Area
41	Vehicle speed is 3 km/h (1.9 mph) or more and voltage of ECU terminal IG remains at more than 17 V or below 9.5 V for more than10 seconds	Battery. IC regulator. Open or short in power source circuit. ECU.

NOTE: Fail Safe Function: If trouble occurs in the control (solenoid) relay circuit, the ECU cuts off current to the ABS control (solenoid) relay and prohibits ABS control.

Fig 1: Code 41 Wiring Schematic

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Code 41 IG Power Source Circuit (1 of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Code 41 IG Power Source Circuit (2 of 3)

Fig 4: Code 41 IG Power Source Circuit (3 of 3)