Lexus NX: Hybrid System Indicator Malfunction

DESCRIPTION

A hybrid system indicator has been used on this vehicle. In this circuit, the combination meter assembly receives the eco-zone indicator level signal from the hybrid vehicle control ECU via CAN communication. The combination meter assembly controls the operation of the hybrid system indicator according to the eco-zone indicator level signal received from the hybrid vehicle control ECU via CAN communication.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, make sure to replace it with a new one.

PROCEDURE

1.

CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Check for DTCs.

Click here

OK:

No DTCs are output.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

2.

PERFORM ACTIVE TEST USING TECHSTREAM (HV SYSTEM INDICATOR)

(a) Using the Techstream, perform the Active Test.

Click here

Body Electrical > Combination Meter > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

HV System Indicator

Hybrid system indicator

OFF, MIN, -50, 0, 100, 200, 300, 400, MAX

-

Body Electrical > Combination Meter > Active Test

Tester Display

HV System Indicator

OK:

Hybrid system indicator indication is normal.

NG

REPLACE COMBINATION METER ASSEMBLY

OK

3.

READ VALUE USING TECHSTREAM (HV SYSTEM INDICATOR)

(a) Using the Techstream, read the Data List.

Click here

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

HV System Indicator

Hybrid system indicator value

Min.: -512%, Max.: 511%

-512 to 511%

-

Body Electrical > Combination Meter > Data List

Tester Display

HV System Indicator

OK:

Hybrid system indicator value displayed on the Techstream is almost the same as hybrid system indicator indication.

NG

GO TO HYBRID CONTROL SYSTEM

OK

4.

CHECK COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly.

Click here

(b) Check that the operation of the hybrid system indicator returns to normal.

OK:

The operation of the hybrid system indicator returns to normal.

OK

END (COMBINATION METER ASSEMBLY IS DEFECTIVE)

NG

REPLACE HYBRID VEHICLE CONTROL ECU

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