Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK POWER STEERING ECU ASSEMBLY

*a

Component without harness connected

(Power Steering ECU Assembly)

-

-

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

NOTICE:

When the EPS warning light 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

F23-1 (IG) - Body ground

LG - Body ground

IG power source

Ignition switch ON

8 to 16 V

F23-7 (CANH) - F23-8 (CANL)

P - W

CAN communication line

Ignition switch off

54 to 69 Ω

z3-1 (TRQ2) - z3-2 (TRQG2)

Y - G

Torque sensor 2 signal

Engine running and steering wheel not being turned (without load)

2.3 to 2.7 V

Engine running and steering wheel being turned to the right with vehicle stopped

1.2 to 2.5 V

Engine running and steering wheel being turned to the left with vehicle stopped

2.5 to 3.8 V

z3-2 (TRQG2) - Body ground

G - Body ground

Torque sensor 2 ground

Always

Below 1 Ω

z3-3 (TRQV2) - z3-2 (TRQG2)

L - G

Torque sensor 2 voltage source

Ignition switch ON

4.5 to 5.5 V

z3-7 (TRQV1) - z3-8 (TRQG1)

R - B

Torque sensor 1 voltage source

Ignition switch ON

4.5 to 5.5 V

z3-8 (TRQG1) - Body ground

B - Body ground

Torque sensor 1 ground

Always

Below 1 Ω

z3-9 (TRQ1) - z3-8 (TRQG1)

W - B

Torque sensor signal

Engine running and steering wheel not being turned (without load)

2.3 to 2.7 V

Engine running and steering wheel being turned to the right with vehicle stopped

2.5 to 3.8 V

Engine running and steering wheel being turned to the left with vehicle stopped

1.2 to 2.5 V

F68-1 (PIG) - Body ground

B-W - Body ground

Power source

Ignition switch ON

9 to 16 V

F68-2 (PGND) - Body ground

W-B - Body ground

Power ground

Always

Below 1 Ω

If the result is not as specified, the ECU may be malfunctioning.

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