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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PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
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