Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Inspection

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Interior / Seat / Front Seat Cushion Heater / Inspection

INSPECTION

PROCEDURE

1. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY (for LH Side)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

c8-1(B) - D-1

Always

Below 1 Ω

c8-1(B) - D-8

Always

Below 1 Ω

c8-3(IG1) - D-3

Always

Below 1 Ω

c8-5(SWR) - D-4

Always

Below 1 Ω

c8-6(THR) - c8-4(PR)

Seat heater temperature 15 to 30°C (59 to 86°F)

6.35 to 12.78 kΩ

c8-2(E) - D-10

Always

Below 1 Ω

c8-2(E) - D-7

Seat heater temperature 20 °C (68 °F)

1.43 to 1.73 Ω

c8-2(E) - E-2

Always

Below 1 Ω

D-12 - E-1

Always

Below 1 Ω

If the result is not as specified, replace the front seat cushion heater assembly (for LH side).

*a

Component without harness connected

(Front Seat Cushion Heater Assembly (for LH Side))

2. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY (for RH Side)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

b6-1(B) - B-1

Always

Below 1 Ω

b6-1(B) - B-8

Always

Below 1 Ω

b6-3(IG1) - B-3

Always

Below 1 Ω

b6-5(SWR) - B-4

Always

Below 1 Ω

b6-6(THR) - b6-4(PR)

Seat heater temperature 15 to 30°C (59 to 86°F)

6.35 to 12.78 kΩ

b6-2(E) - B-10

Always

Below 1 Ω

b6-2(E) - B-7

Seat heater temperature 20 °C (68 °F)

1.43 to 1.73 Ω

b6-2(E) - C-2

Always

Below 1 Ω

B-12 - C-1

Always

Below 1 Ω

If the result is not as specified, replace the front seat cushion heater assembly (for RH side).

*a

Component without harness connected

(Front Seat Cushion Heater Assembly (for RH Side))

3. INSPECT FRONT SEAT CUSHION HEATER (FRONT SEAT CUSHION PAD WITH COVER LH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

c8-1(B) - D-1

Always

Below 1 Ω

c8-1(B) - D-8

Always

Below 1 Ω

c8-3(IG1) - D-3

Always

Below 1 Ω

c8-5(SWR) - D-4

Always

Below 1 Ω

c8-6(THR) - c8-4(PR)

Seat heater temperature 15 to 30°C (59 to 86°F)

6.10 to 13.28 kΩ

c8-2(E) - D-10

Always

Below 1 Ω

c8-2(E) - D-7

Seat heater temperature 23 °C (73 °F)

0.98 to 1.20 Ω

c8-2(E) - E-2

Always

Below 1 Ω

D-12 - E-1

Always

Below 1 Ω

If the result is not as specified, replace the front seat cushion heater (front seat cushion pad with cover LH).

*a

Component without harness connected

(Front Seat Cushion Heater (Front Seat Cushion Pad with Cover LH))

4. INSPECT FRONT SEAT CUSHION HEATER (FRONT SEAT CUSHION PAD WITH COVER RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

b6-1(B) - B-1

Always

Below 1 Ω

b6-1(B) - B-8

Always

Below 1 Ω

b6-3(IG1) - B-3

Always

Below 1 Ω

b6-5(SWR) - B-4

Always

Below 1 Ω

b6-6(THR) - b6-4(PR)

Seat heater temperature 15 to 30°C (59 to 86°F)

6.10 to 13.28 kΩ

b6-2(E) - B-10

Always

Below 1 Ω

b6-2(E) - B-7

Seat heater temperature 23 °C (73 °F)

0.98 to 1.20 Ω

b6-2(E) - C-2

Always

Below 1 Ω

B-12 - C-1

Always

Below 1 Ω

If the result is not as specified, replace the front seat cushion heater (front seat cushion pad with cover RH).

*a

Component without harness connected

(Front Seat Cushion Heater (Front Seat Cushion Pad with Cover RH))
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