RM3660EC
_55
Steering
_080761
POWER ASSIST SYSTEMS
_0392075
POWER STEERING SYSTEM(for HV Model)
U
POWER ASSIST SYSTEMS POWER STEERING SYSTEM(for HV Model) TERMINALS OF ECU
CHECK POWER STEERING ECU ASSEMBLY
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) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
|
*1: for TFTM Made *2: for 8ZR-FXE (w/ GTMC Made) *3: for M20F-FXS |
||||
| I21-1 (IG) - Body ground | P - Body ground*1,*3
V - Body ground*2 |
IG power source | Power switch on (IG) | 8 to 16 V |
| I21-7 (CANH) - I21-8 (CANL) | G - W | CAN communication line | Power switch off | 54 to 69 Ω |
| z7-1 (TRQ2) - z7-2 (TRQG2) | Y - G | Torque sensor 2 signal | Power switch on (READY) and steering wheel not being turned (without load) | 2.3 to 2.7 V |
| Power switch on (READY) and steering wheel being turned to the right with vehicle stopped | 1.2 to 2.5 V | |||
| Power switch on (READY) and steering wheel being turned to the left with vehicle stopped | 2.5 to 3.8 V | |||
| z7-2 (TRQG2) - Body ground | G - Body ground | Torque sensor 2 ground | Always | Below 1 Ω |
| z7-3 (TRQV2) - z7-2 (TRQG2) | L - G | Torque sensor 2 voltage source | Power switch on (IG) | 4.5 to 5.5 V |
| z7-7 (TRQV1) - z7-8 (TRQG1) | R - B | Torque sensor 1 voltage source | Power switch on (IG) | 4.5 to 5.5 V |
| z7-8 (TRQG1) - Body ground | B - Body ground | Torque sensor 1 ground | Always | Below 1 Ω |
| z7-9 (TRQ1) - z7-8 (TRQG1) | W - B | Torque sensor signal | Power switch on (READY) and steering wheel not being turned (without load) | 2.3 to 2.7 V |
| Power switch on (READY) and steering wheel being turned to the right with vehicle stopped | 2.5 to 3.8 V | |||
| Power switch on (READY) and steering wheel being turned to the left with vehicle stopped | 1.2 to 2.5 V | |||
| I42-1 (PIG) - Body ground | W - Body ground | Power source | Always | 9 to 16 V |
| I42-2 (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.