Lexus NX manuals

Lexus NX: Relay

Lexus NX Service Manual / Vehicle Interior / Heating / Air Conditioning / Relay

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT PTC HEATER RELAY(PTC HTR NO. 1, NO. 3)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Auxiliary battery voltage is not applied between terminals 1 and 2

10 kΩ or higher

3 - 5

Auxiliary battery voltage is applied between terminals 1 and 2

Below 1 Ω
  • If the result is not as specified, replace the PTC heater relay (PTC HTR NO. 1, NO. 3).

*a

Component without harness connected

(PTC Heater Relay)

2. INSPECT PTC HEATER RELAY(PTC HTR NO. 2)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Auxiliary battery voltage is not applied between terminals 1 and 2

10 kΩ or higher

3 - 5

Auxiliary battery voltage is applied between terminals 1 and 2

Below 1 Ω
  • If the result is not as specified, replace the PTC heater relay (PTC HTR NO. 2).

*a

Component without harness connected

(PTC Heater Relay)

3. INSPECT WATER PUMP RELAY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Auxiliary battery voltage is not applied between terminals 1 and 2

10 kΩ or higher

3 - 5

Auxiliary battery voltage is applied between terminals 1 and 2

Below 1 Ω

If the result is not as specified, replace the water pump relay.

*a

Component without harness connected

(Water Pump Relay)

READ NEXT:

 Room Temperature Sensor

 Components

COMPONENTS ILLUSTRATION *1 CONSOLE ARMREST ASSEMBLY *2 COOLER THERMISTOR (ROOM TEMPERATURE SENSOR) *3 COWL SIDE TRIM BOARD LH *4 DOOR SCUFF PLATE ASSEMBLY LH *5 INSTRUMENT SI

 Removal

REMOVAL PROCEDURE 1. REMOVE DOOR SCUFF PLATE ASSEMBLY LH Click here 2. REMOVE COWL SIDE TRIM BOARD LH Click here 3. REMOVE CONSOLE ARMREST ASSEMBLY Click here 4. REMOVE UPPER REAR CONSOL

SEE MORE:

 Installation

INSTALLATION PROCEDURE 1. INSTALL BRAKE BOOSTER PUMP ASSEMBLY (a) Install the 2 brake actuator bracket cushions to the brake actuator bracket assembly. (b) Install the brake booster pump assembly, 2 brake booster pump bushings and 2 brake actuator case collars to the brake actuator bracket assemb

 Installation

INSTALLATION PROCEDURE 1. INSTALL STEERING PAD ASSEMBLY (a) Check that the power switch is off. (b) Check that the cable is disconnected from the negative (-) auxiliary battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal

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