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

INSPECTION

PROCEDURE

1. INSPECT MAP LIGHT ASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

U11-4 (+B1) - U12-14 (RIFR)

Always

Below 1 Ω

U12-10 (RLMP) - U12-20 (GND9)

Always

Below 1 Ω

U11-1 (IG) - U11-14 (IG2)

Always

Below 1 Ω

U11-19 (GND) - U11-21 (GND2)

Always

Below 1 Ω

If the result is not as specified, replace the map light assembly.

(b) Inspect the front map light.

(1) Apply battery voltage to the connector and check that the front map light comes on.

OK:

Measurement Condition

Condition

Specified Condition

Battery positive (+) → U11-4 (+B1)

Battery negative (-) → U12-20 (GND9)

Front map light switch LH on

Front map light LH comes on

Front map light switch RH on

Front map light RH comes on

If the result is not as specified, replace the map light assembly.

*a

Component without harness connected

(Map Light Assembly)

(c) Inspect the front dome light.

(1) Apply battery voltage to the connector and check that the front dome light comes on.

OK:

Measurement Condition

Condition

Specified Condition

Battery positive (+) → U11-4 (+B1)

Battery negative (-) → U11-9 (CTY)

Always

Front dome light comes on

Battery positive (+) → U11-4 (+B1)

Battery negative (-) → U11-10 (RIFL)

If the result is not as specified, replace the bulb or map light assembly.

(d) Inspect the front dome light switch and door switch.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

U12-18 (DOOR) - U12-20 (GND9)

Door switch on

Below 1 Ω

U12-18 (DOOR) - U12-20 (GND9)

Door switch off

10 kΩ or higher

If the result is not as specified, replace the map light assembly.

(e) Inspect the switch illumination.

(1) Apply battery voltage to the connector and check that the switch illumination comes on.

OK:

Measurement Condition

Condition

Specified Condition

Battery positive (+) → U11-16 (ILLB)

Battery negative (-) → U11-8 (LILL)

Always

Switch illumination comes on

If the result is not as specified, replace the map light assembly.

    Disassembly
    DISASSEMBLY PROCEDURE 1. REMOVE NO. 1 ROOF CONSOLE BOX COVER (a) Using a screwdriver with its tip wrapped with protective tape, disengage the 20 claws to remove the No. 1 roof console box cover. ...

    Reassembly
    REASSEMBLY PROCEDURE 1. INSTALL NO. 1 ROOF CONSOLE BOX COVER (a) Engage the 20 claws to install the No. 1 roof console box cover. ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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