Lexus NX: HV Control System Regenerative Malfunction (C1259,C1310)
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) communicates with the hybrid vehicle control ECU and controls braking force according to the motor's regenerative force.
The skid control ECU (brake booster with master cylinder assembly) sends VSC (cooperative control with EPS) signals to the hybrid vehicle control ECU and receives operating signals from the hybrid vehicle control ECU.
The skid control ECU (brake booster with master cylinder assembly) uses CAN communication for communicating with the hybrid vehicle control ECU. If a communication malfunction is detected, the skid control ECU (brake booster with master cylinder assembly) prohibits VSC operation, brake hold operation and part of the electronically controlled brake system control as a fail-safe function.
If the signals from the hybrid vehicle control ECU return to normal, the warning light will go off and the DTCs C1259 and C1310 will be cleared.
HINT:
These DTCs will be output from the skid control ECU (brake booster with master cylinder assembly) when the hybrid vehicle control ECU sends a malfunction signal to the skid control ECU (brake booster with master cylinder assembly).
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|---|
| C1259 | HV Control System Regenerative Malfunction | - | A regeneration malfunction signal is input for at least 0.036 seconds when IG2 terminal voltage is 9.5 V or more for at least 2 seconds and communication with the hybrid vehicle control ECU is valid. | Hybrid vehicle control ECU (Regeneration malfunction) | - |
| C1310 | HV System Malfunction | - 431 |
| Hybrid vehicle control ECU | - |
PROCEDURE
| 1. | CHECK HYBRID CONTROL SYSTEM |
(a) Check if a hybrid control system DTC is output.
Click here .gif)
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output | B |
| A | .gif) | REPLACE HYBRID VEHICLE CONTROL ECU |
| B | | INSPECT HYBRID CONTROL SYSTEM |
READ NEXT:
Low Output Signal of Front Speed Sensor RH (C1271,C1272,C1464,C1465)
DESCRIPTION Each speed sensor detects the wheel speed and sends the signals to the skid control ECU (brake booster with master cylinder assembly). These signals are used for ABS control. DTCs C1271 an
Low Output Signal of Rear Speed Sensor RH (C1273,C1274,C1466,C1467)
DESCRIPTION Each speed sensor detects the wheel speed and sends the signals to the skid control ECU (brake booster with master cylinder assembly). These signals are used for ABS control. DTCs C1273 an
Abnormal Zero Point of Steering Angle Sensor (C1290)
DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) acquires the steering sensor zero point every time the power switch is turned on (READY) and the vehicle is driven at 35
SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT FOG LIGHT ASSEMBLY LH (a) Apply battery voltage to the connector and check the light illumination condition. OK: Condition Specified Condition Battery positive (+) → 2 (B) Battery negative (-) → 1 (E) Illuminates If the result is not as specified
Inspection
INSPECTION CAUTION / NOTICE / HINT NOTICE:
When using a vise, place aluminum plates between the part and vise.
When using a vise, do not overtighten it.
PROCEDURE 1. INSPECT TIE ROD END SUB-ASSEMBLY LH (a) Secure the tie rod end between aluminum plates in a vise. NOTICE: Do not overtighte
