Lexus NX: Terminals Of Ecu
TERMINALS OF ECU
| *a | Component with harness connected (Power Steering ECU Assembly) | - | - |
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 |
|---|---|---|---|---|
| n3-1 (IG) - n1-2 (PGND) | R - B | IG power source | Power switch on (IG) | 8 to 16 V |
| n3-4 (CANH) - n3-8 (CANL) | W - B | CAN communication line | Power switch off | 54 to 69 Ω |
| n3-5 (TS) - n1-2 (PGND) | O - B | Terminal TS of DLC3 | Always | 9 to 16 V |
| a-1 (TRQG) - Body ground | - (Not available) - Body ground | Torque sensor ground | Always | Below 1 Ω |
| a-2 (TRQ2) - a-1 (TRQG) | - (Not available) | Torque sensor 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 right with vehicle stopped | 0.3 to 2.5 V | |||
| Power switch on (READY) Steering wheel being turned to left with vehicle stopped | 2.5 to 4.7 V | |||
| a-3 (TRQV) - a-1 (TRQG) | - (Not available) | Torque sensor voltage source | Power switch on (READY) | 8.5 to 10.5 V |
| a-5 (TRQF) - a-1 (TRQG) | - (Not available) | Torque sensor reference voltage | Power switch on (READY) | 3.35 to 3.37 V |
| a-7 (TRQ1) - a-1 (TRQG) | - (Not available) | Torque sensor 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 right with vehicle stopped | 2.5 to 4.7 V | |||
| Power switch on (READY) Steering wheel being turned to left with vehicle stopped | 0.3 to 2.5 V | |||
| b-1 (RZCS2) - n1-2 (PGND) | B - B | Rotation angle sensor COS aspect output signal | Power switch on (READY) Steering wheel turned | 0.68 to 4.42 V |
| b-2 (RZV2) - n1-2 (PGND) | G - B | Rotation angle sensor excitation output signal | Power switch on (READY) Steering wheel turned | 0.68 to 4.42 V |
| b-3 (RZSN2) - n1-2 (PGND) | L - B | Rotation angle sensor SIN aspect output signal | Power switch on (READY) Steering wheel turned | 0.68 to 4.42 V |
| b-5 (RZCS1) - n1-2 (PGND) | R - B | Rotation angle sensor COS aspect output signal | Power switch on (READY) Steering wheel turned | 0.68 to 4.42 V |
| b-6 (RZV1) - n1-2 (PGND) | W - B | Rotation angle sensor excitation output signal | Power switch on (READY) Steering wheel turned | 0.68 to 4.42 V |
| b-7 (RZSN1) - n1-2 (PGND) | Y - B | Rotation angle sensor SIN aspect output signal | Power switch on (READY) Steering wheel turned | 0.68 to 4.42 V |
| n1-1 (PIG) - n1-2 (PGND) | R - B | Power source | Always | 9 to 16 V |
| n1-2 (PGND) - Body ground | B - Body ground | Power ground | Always | Below 1 Ω |
| c-1 (PHA) - n1-2 (PGND) | # - B | A phase motor output | Power switch on (READY) Steering wheel turned | Value changes within 4 to 35 V range |
| c-2 (PHB) - n1-2 (PGND) | # - B | B phase motor output | Power switch on (READY) Steering wheel turned | Value changes within 4 to 35 V range |
| c-3 (PHC) - n1-2 (PGND) | # - B | C phase motor output | Power switch on (READY) Steering wheel turned | Value changes within 4 to 35 V range |
HINT:
# means that the motor terminal is tightened directly to the ECU with bolts.
READ NEXT:
Diagnosis System
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Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (USING THE Techstream) (a) Turn the power switch off. (b) Connect the Techstream to the DLC3. (c) Turn the power switch on (IG). (d) Turn the Techstream on. (e) Enter the f
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA NOTICE:
It is difficult to show the specified values (judgment values) clearly because freeze frame data values change significantly due to differences in measur
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Reassembly
REASSEMBLY PROCEDURE 1. INSTALL NO. 2 MOULDING TAPE HINT:
When installing the No. 2 moulding tape, heat the front bumper cover and No. 2 moulding tape using a heat light.
Use the same procedure described for the other side.
Standard: Item Temperature Front Bumper Cover 20 to 30°
Disposal
DISPOSAL CAUTION / NOTICE / HINT CAUTION: Before performing pre-disposal deployment of any SRS part, review and closely follow all applicable environmental and hazardous material regulations. Pre-disposal deployment may be considered hazardous material treatment. PROCEDURE 1. PRECAUTION CAUTION:
