Front Fog Light Circuit

LIGHTING: LIGHTING SYSTEM: Front Fog Light Circuit
- Front Fog Light Circuit

DESCRIPTION

The multiplex network body ECU controls the FOG 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:

Front fog lights come on.

NG -- INSPECT RELAY

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

2. INSPECT RELAY

(a) Inspect front fog relay continuity.





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

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

Standard resistance:





(b) 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. INSPECT 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 -- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR

5. 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 -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (INSTRUMENT JUNCTION BLOCK ASSEMBLY CIRCUIT)

(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.

7. CHECK HARNESS AND CONNECTOR (BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the D9 connector of the multiplex network body ECU and the II connector of the instrument panel junction block assembly.

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





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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