Lexus NX: Communication Error from VSC to HV ECU (P1630)

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) sends signals such as brake request signals to the hybrid vehicle control ECU. If an abnormal signal is detected, the hybrid vehicle control ECU stores DTC P1630.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

P1630

Communication Error from VSC to HV ECU

When the dynamic radar cruise control system is operating, the hybrid vehicle control ECU detects abnormal data sent from the skid control ECU (brake booster with master cylinder assembly) for approximately 1 second or more.

  • Electronically controlled brake system
  • Hybrid vehicle control ECU

Radar Cruise1

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.

PROCEDURE

1.

CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Check for electronically controlled brake system DTCs.

Click here

Chassis > ABS/VSC/TRC > Trouble Codes

Result

Proceed to

Electronically controlled brake system DTCs are not output

A

Electronically controlled brake system DTCs are output

B

B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

A

2.

CHECK FOR DTCs (Radar Cruise1)

(a) Clear the DTCs.

Click here

Powertrain > Radar Cruise1 > Clear DTCs

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

(c) Check for DTCs.

Click here

Powertrain > Radar Cruise1 > Trouble Codes

Result

Proceed to

DTC P1630 is not output

A

DTC P1630 is output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE HYBRID VEHICLE CONTROL ECU

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