Lexus NX: Terminals Of Ecu

TERMINALS OF ECU

*a

Component with harness connected

(Power Steering ECU Assembly)

-

-

CHECK POWER STEERING ECU ASSEMBLY

(a) Measure the voltage and resistance according to the value(s) in the table below.

NOTICE:

When the power steering warning light (red) is illuminated due to a malfunction, the fail-safe function may cause the voltage of the power steering ECU assembly terminals to become 0 V.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

n3-1 (IG) - n1-2 (PGND)

R - B

IG power source

Power switch on (IG)

8 to 16 V

n3-4 (CANH) - n3-8 (CANL)

W - B

CAN communication line

Power switch off

54 to 69 Ω

n3-5 (TS) - n1-2 (PGND)

O - B

Terminal TS of DLC3

Always

9 to 16 V

a-1 (TRQG) - Body ground

- (Not available) - Body ground

Torque sensor ground

Always

Below 1 Ω

a-2 (TRQ2) - a-1 (TRQG)

- (Not available)

Torque sensor signal

Power switch on (READY)

Steering wheel not being turned (without load)

2.3 to 2.7 V

Power switch on (READY)

Steering wheel being turned to right with vehicle stopped

0.3 to 2.5 V

Power switch on (READY)

Steering wheel being turned to left with vehicle stopped

2.5 to 4.7 V

a-3 (TRQV) - a-1 (TRQG)

- (Not available)

Torque sensor voltage source

Power switch on (READY)

8.5 to 10.5 V

a-5 (TRQF) - a-1 (TRQG)

- (Not available)

Torque sensor reference voltage

Power switch on (READY)

3.35 to 3.37 V

a-7 (TRQ1) - a-1 (TRQG)

- (Not available)

Torque sensor signal

Power switch on (READY)

Steering wheel not being turned (without load)

2.3 to 2.7 V

Power switch on (READY)

Steering wheel being turned to right with vehicle stopped

2.5 to 4.7 V

Power switch on (READY)

Steering wheel being turned to left with vehicle stopped

0.3 to 2.5 V

b-1 (RZCS2) - n1-2 (PGND)

B - B

Rotation angle sensor COS aspect output signal

Power switch on (READY)

Steering wheel turned

0.68 to 4.42 V

b-2 (RZV2) - n1-2 (PGND)

G - B

Rotation angle sensor excitation output signal

Power switch on (READY)

Steering wheel turned

0.68 to 4.42 V

b-3 (RZSN2) - n1-2 (PGND)

L - B

Rotation angle sensor SIN aspect output signal

Power switch on (READY)

Steering wheel turned

0.68 to 4.42 V

b-5 (RZCS1) - n1-2 (PGND)

R - B

Rotation angle sensor COS aspect output signal

Power switch on (READY)

Steering wheel turned

0.68 to 4.42 V

b-6 (RZV1) - n1-2 (PGND)

W - B

Rotation angle sensor excitation output signal

Power switch on (READY)

Steering wheel turned

0.68 to 4.42 V

b-7 (RZSN1) - n1-2 (PGND)

Y - B

Rotation angle sensor SIN aspect output signal

Power switch on (READY)

Steering wheel turned

0.68 to 4.42 V

n1-1 (PIG) - n1-2 (PGND)

R - B

Power source

Always

9 to 16 V

n1-2 (PGND) - Body ground

B - Body ground

Power ground

Always

Below 1 Ω

c-1 (PHA) - n1-2 (PGND)

# - B

A phase motor output

Power switch on (READY)

Steering wheel turned

Value changes within 4 to 35 V range

c-2 (PHB) - n1-2 (PGND)

# - B

B phase motor output

Power switch on (READY)

Steering wheel turned

Value changes within 4 to 35 V range

c-3 (PHC) - n1-2 (PGND)

# - B

C phase motor output

Power switch on (READY)

Steering wheel turned

Value changes within 4 to 35 V range

HINT:

# means that the motor terminal is tightened directly to the ECU with bolts.

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