Lexus NX: Terminals Of Ecu

TERMINALS OF ECU

*a

Component with harness connected

(Power Steering ECU Assembly)

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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

n2-1 (IG) - Body ground

R - Body ground

IG power source

Power switch on (IG)

8 to 16 V

n2-6 (TS) - Body ground

G - Body ground

Test mode signal

Always

9 to 16 V

n2-7 (CANH) - n2-8 (CANL)

W - B

CAN communication line

Power switch off

54 to 69 Ω

z11-8 (TRQV) - z11-2 (TRQG)

R - B

Torque sensor voltage source

Power switch on (IG)

4.5 to 5.5 V

z11-1 (TRQ2) - z11-2 (TRQG)

Y - B

Torque sensor 2 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 the right with vehicle stopped

1.2 to 2.5 V

Power switch on (READY), steering wheel being turned to the left with vehicle stopped

2.5 to 3.8 V

z11-2 (TRQG) - Body ground

B - Body ground

Torque sensor ground

Always

Below 1 Ω

z11-9 (TRQ1) - z11-2 (TRQG)

W - B

Torque sensor 1 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 the left with vehicle stopped

1.2 to 2.5 V

Power switch on (READY), steering wheel being turned to the right with vehicle stopped

2.5 to 3.8 V

n1-1 (PIG) - Body ground

R - Body ground

Power source

Always

9 to 16 V

n1-2 (PGND) - Body ground

B - Body ground

Power ground

Always

Below 1 Ω

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