Lexus NX: Indicator Circuit

DESCRIPTION

In accordance with the shift lever position, each shift position indicator light will turn on.

WIRING DIAGRAM

PROCEDURE

1.

CHECK SHIFT POSITION INDICATOR

(a) Turn the power switch on (ACC).

(b) Check that each shift position indicator light turns on correctly.

Result

Proceed to

All shift position indicator lights turn on simultaneously

A

Shift position indicator lights other than corresponding one turn on

A

Corresponding shift position indicator light does not turn on

B

No shift position indicator lights turn on

B

(c) Turn the power switch off.

B

GO TO STEP 3

A

2.

CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT TO GND)

(a) Disconnect the I115 and I116 hybrid vehicle control ECU connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I116-13 (INDP) - Body ground and other terminals

Always

10 kΩ or higher

I115-8 (INDR) - Body ground and other terminals

Always

10 kΩ or higher

I116-12 (INDN) - Body ground and other terminals

Always

10 kΩ or higher

I116-11 (INDD) - Body ground and other terminals

Always

10 kΩ or higher

I116-10 (INDM) - Body ground and other terminals

Always

10 kΩ or higher

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

(c) Reconnect the I115 and I116 hybrid vehicle control ECU connectors.

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

GO TO STEP 6

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Disconnect the I185 shift position indicator connector.

(b) Turn the power switch on (ACC).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I185-8 (PWR) - Body ground

Power switch on (ACC)

11 to 14 V

*a

Front view of wire harness connector

(to Shift Position Indicator)

(d) Turn the power switch off.

(e) Reconnect the I185 shift position indicator connector.

NG

REPAIR OR REPLACE POWER SOURCE CIRCUIT

OK

4.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL ACCI)

(a) Turn the power switch on (ACC).

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A60-22 (ACCI) - Body ground

Power switch on (ACC)

11 to 14 V

*a

Component with harness connected

(Hybrid Vehicle Control ECU)

(c) Turn the power switch off.

NG

REPAIR OR REPLACE POWER SOURCE CIRCUIT

OK

5.

CHECK HARNESS AND CONNECTOR (CHECK FOR OPEN)

(a) Disconnect the I115 and I116 hybrid vehicle control ECU connectors.

(b) Turn the power switch on (ACC).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I116-13 (INDP) - Body ground

Power switch on (ACC)

11 to 14 V

I115-8 (INDR) - Body ground

Power switch on (ACC)

11 to 14 V

I116-12 (INDN) - Body ground

Power switch on (ACC)

11 to 14 V

I116-11 (INDD) - Body ground

Power switch on (ACC)

11 to 14 V

I116-10 (INDM) - Body ground

Power switch on (ACC)

11 to 14 V

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

(d) Turn the power switch off.

(e) Reconnect the I115 and I116 hybrid vehicle control ECU connectors.

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

GO TO STEP 7

6.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - SHIFT POSITION INDICATOR)

(a) Disconnect the I115 and I116 hybrid vehicle control ECU connectors.

(b) Disconnect the I185 shift position indicator connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I116-13 (INDP) or I185-5 (P) - Body ground and other terminals

Always

10 kΩ or higher

I115-8 (INDR) or I185-4 (R) - Body ground and other terminals

Always

10 kΩ or higher

I116-12 (INDN) or I185-3 (N) - Body ground and other terminals

Always

10 kΩ or higher

I116-11 (INDD) or I185-2 (D) - Body ground and other terminals

Always

10 kΩ or higher

I116-10 (INDM) or I185-1 (S) - Body ground and other terminals

Always

10 kΩ or higher

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

*b

Front view of wire harness connector

(to Shift Position Indicator)

(d) Reconnect the I185 shift position indicator connector.

(e) Reconnect the I115 and I116 hybrid vehicle control ECU connectors.

OK

REPLACE SHIFT POSITION INDICATOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - SHIFT POSITION INDICATOR)

(a) Disconnect the I115 and I116 hybrid vehicle control ECU connectors.

(b) Disconnect the I185 shift position indicator connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I116-13 (INDP) -I185-5 (P)

Always

Below 1 Ω

I115-8 (INDR) -I185-4 (R)

Always

Below 1 Ω

I116-12 (INDN) -I185-3 (N)

Always

Below 1 Ω

I116-11 (INDD) -I185-2 (D)

Always

Below 1 Ω

I116-10 (INDM) -I185-1 (S)

Always

Below 1 Ω

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

*b

Front view of wire harness connector

(to Shift Position Indicator)

(d) Reconnect the I185 shift position indicator connector.

(e) Reconnect the I115 and I116 hybrid vehicle control ECU connectors.

OK

REPLACE SHIFT POSITION INDICATOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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