Illumination Circuit

LIGHTING SYSTEM: Illumination Circuit

Illumination Circuit

DESCRIPTION

The multiplex network body ECU controls the following.
1 Ignition key cylinder light
2 Interior light
3 Rear RH courtesy light (for Convertible)

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR
(a) Disconnect the 2G connector from the instrument panel junction block assembly.





(b) Disconnect the 2K and 2R connectors from the instrument panel junction block assembly.





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





NG -- INSPECT INTERIOR LIGHT
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT INTERIOR LIGHT





(a) Coupe:
Inspect room light assembly No.1.
(1) Remove the room light assembly No.1.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(3) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, then check that the light comes on when the switch is in the DOOR position.
OK:
Light comes on.
(4) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 3, then check that the light comes on when the switch is in the ON position.
OK:
Light comes on.





(b) Convertible:
Inspect courtesy light rear RH.
(1) Remove the courtesy light rear RH.
(2) Connect the positive (+) lead from the battery to one of the terminals and the negative (-) lead to the other terminal, then check that the light comes on.
OK:
Light comes on.





(c) Convertible:
Inspect map light assembly.
(1) Remove the map light assembly.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(3) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, then check that the light comes on when the switch is in the ON position.
OK:
Light comes on.
(4) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 3, then check that the light comes on when the switch is in the DOOR position.
OK:
Light comes on.





(d) Inspect ignition key cylinder light.
(1) Remove the ignition key cylinder light.
(2) Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 6, then check that the light comes on.
OK:
Light comes on.
NG -- REPLACE INTERIOR LIGHT
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR