RM38T0EC _55 Steering _112287 POWER ASSIST SYSTEMS _0510880 POWER STEERING SYSTEM U

POWER ASSIST SYSTEMS  POWER STEERING SYSTEM  TERMINALS OF ECU  


CHECK POWER STEERING ECU ASSEMBLY


C319555C52
1.938,0.333 2.354,0.583 0.417,0.25 4.25,0.333 4.667,0.583 0.417,0.25 5.365,0.333 5.781,0.583 0.417,0.25 2.052,0.365 2.51,0.563 0.458,0.198 10 false I42 0.24,0.083 0.698,0.281 0.458,0.198 10 false *a 4.365,0.365 4.823,0.563 0.458,0.198 10 false z7 5.469,0.365 5.927,0.563 0.458,0.198 10 false I21
*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) Terminal Description Condition Specified Condition
I21-1 (IG) - Body ground IG power source Ignition switch ON 8 to 16 V
I21-7 (CANH) - I21-8 (CANL) CAN communication line Ignition switch off 54 to 69 Ω
z7-1 (TRQ2) - z7-2 (TRQG2) Torque sensor 2 signal
·

Ignition switch ON and steering wheel not being turned (without load)*1

·

Engine running and steering wheel not being turned (without load)*2


2.3 to 2.7 V
·

Ignition switch ON and steering wheel being turned to the right with vehicle stopped*1

·

Engine running and steering wheel being turned to the right with vehicle stopped*2


1.2 to 2.5 V
·

Ignition switch ON and steering wheel being turned to the left with vehicle stopped*1

·

Engine running and steering wheel being turned to the left with vehicle stopped*2


2.5 to 3.8 V
z7-2 (TRQG2) - Body ground Torque sensor 2 ground Always Below 1 Ω
z7-3 (TRQV2) - z7-2 (TRQG2) Torque sensor 2 voltage source Ignition switch ON 4.5 to 5.5 V
z7-7 (TRQV1) - z7-8 (TRQG1) Torque sensor 1 voltage source Ignition switch ON 4.5 to 5.5 V
z7-8 (TRQG1) - Body ground Torque sensor 1 ground Always Below 1 Ω
z7-9 (TRQ1) - z7-8 (TRQG1) Torque sensor signal
·

Ignition switch ON and steering wheel not being turned (without load)*1

·

Engine running and steering wheel not being turned (without load)*2


2.3 to 2.7 V
·

Ignition switch ON and steering wheel being turned to the right with vehicle stopped*1

·

Engine running and steering wheel being turned to the right with vehicle stopped*2


2.5 to 3.8 V
·

Ignition switch ON and steering wheel being turned to the left with vehicle stopped*1

·

Engine running and steering wheel being turned to the left with vehicle stopped*2


1.2 to 2.5 V
I42-1 (PIG) - Body ground Power source Always 9 to 16 V
I42-2 (PGND) - Body ground Power ground Always Below 1 Ω

*1: for HEV Model

*2: for Gasoline Model


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