Rear Room Light Assembly: Inspection

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT SPOT LIGHT ASSEMBLY (REAR SEAT ILLUMINATION)

Disconnect the Q6 spot light assembly connector.

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

Fig 1: Identifying Q6 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
Q6-1 (B) - Q6-2 (L)	Seat illumination switch is not pushed (OFF)	Below 1 V
Q6-1 (B) - Q6-2 (L)	Seat illumination switch is pushed (ON)	10 to 14 V

If the result is not as specified, there is a malfunction on the wire harness side.

Apply battery voltage to the spot light assembly connector.

Check that the rear seat illumination comes on.

MEASUREMENT CONDITION

Measurement Condition	Switch Condition	Specified Condition
Battery positive (+) → Terminal Q6-1 (B) Battery negative (-) → Terminal Q6-2 (L)	Always	Rear seat illumination comes on

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

Fig 2: Identifying Q6 Connector Terminals (Components Side)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT REAR ROOM LIGHT ASSEMBLY (REAR PERSONAL LIGHT)

Disconnect the Q4 or Q5 rear room light assembly connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
Q4-1 (B) - Q4-2 (E)	Front LH personal light switch is not pushed (OFF)	Below 1 V
Q4-1 (B) - Q4-2 (E)	Front LH personal light switch is pushed (ON)	10 to 14 V
Q5-1 (B) - Q5-2 (E)	Front RH personal light switch is not pushed (OFF)	Below 1 V
Q5-1 (B) - Q5-2 (E)	Front RH personal light switch is pushed (ON)	10 to 14 V

If the result is not specified, there is a malfunction on the wire harness side.

Fig 3: Identifying Q4 And Q5 Connectors Terminals

Apply battery voltage to the spot light assembly connector.

Check that the rear personal light comes on.

MEASUREMENT CONDITION

Measurement Condition	Switch Condition	Specified Condition
Battery positive (+) → Terminal Q4-1 Battery negative (-) → Terminal Q4-2	Rear LH personal light switch is pushed (ON)	Rear LH personal light comes on
Battery positive (+) → Terminal Q5-1 Battery negative (-) → Terminal Q5-2	Rear RH personal light switch is pushed (ON)	Rear RH personal light comes on

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

Fig 4: Identifying Q4 And Q5 Connectors Terminals (Components Side)