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

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

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

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CODE 51 CIRCUIT DESCRIPTION

Code	Diagnostic Code Detecting Condition	Trouble Area
51	Pump motor is not operating normally duringinitial check.	ABS pump motor.

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 5: Code 51 ABS Pump Motor Lock Wiring Schematic

CODE 51 WIRE COLOR ABBREVIATIONS

Abbreviation	Wire Color
B	Black
GR-G	Gray/Green
GR-L	Gray/Blue
GR-R	Gray/Red
LG-R	Light Green/Red
R	Red
R-G	Red/Green
R-W	Red/White
W	White
W-B	White/Black
W-L	White/Blue
W-R	White/Red
Y-B	Yellow/Black