Taillight Relay Circuit

LIGHTING: LIGHTING SYSTEM: Taillight Relay Circuit
- Taillight Relay Circuit

DESCRIPTION

The body ECU controls the TAIL relay when a signal is received from the headlight dimmer switch assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Body / Active Test.

(e) Check the operation.

Body (Body ECU)





OK:

Tail lights come on.

NG -- INSPECT RELAY

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. INSPECT RELAY

(a) Inspect TAIL relay continuity.





(1) Remove the tail relay from the instrument panel J/B.

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

Standard resistance:





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

3. CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) 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 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) 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

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH TAILLIGHT CIRCUIT)