Taillight Relay Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Taillight Relay Circuit
- Taillight Relay Circuit

DESCRIPTION

* The daytime running light relay receives the light control switch TAIL signal to control the taillight relay.

HINT
* If only one taillight does not illuminate, check the bulb or wire harness related to the bulb.
* The taillight relay is installed in the instrument panel junction block, so unlike conventional relays, it can not be removed for inspection.

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (TAIL)

(a) Remove the TAIL fuse from the instrument panel junction block.

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

Standard Resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK

(a) Measure the voltage between the loading slot of the TAIL fuse and body ground.





Standard Voltage:





NG -- CHECK HARNESS AND CONNECTOR (BATTERY - DAYTIME RUNNING LIGHT CONTROL RELAY)

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FUSE - EACH BULB)

3. CHECK HARNESS AND CONNECTOR (BATTERY - DAYTIME RUNNING LIGHT CONTROL RELAY)

(a) Disconnect the E91 daytime running light relay connector.

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

Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. INSPECT DAYTIME RUNNING LIGHT RELAY

(a) Reconnect the E91 daytime running light relay connector.





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

Standard Voltage:





NG -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)