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)

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 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:

 Control Module Communication Bus Off (U0073,U0100,U0126,U0129,U0140,U0163,U0233,U0265-U0268,U1110)

DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the parking assist ECU. HINT: If CAN communication system DTCs are stored, they may also be stored in other systems. DTC No. Detection Item DTC Detection Condition Trouble Area U0073

 Components

COMPONENTS ILLUSTRATION *A w/ AVS - - *1 FRONT AXLE HUB SUB-ASSEMBLY LH *2 FRONT AXLE SHAFT NUT LH *3 FRONT DISC *4 FRONT DISC BRAKE CALIPER ASSEMBLY LH *5 FRONT FLEXIBLE HOSE *6 FRONT LOWER NO. 1 SUSPENSION ARM SUB-ASSEMBLY LH *7 FRONT SPEED SENSOR LH

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