Toyota RAV4 manuals

Toyota Sienna Service Manual: Front Fog Light Circuit

DESCRIPTION

The Multiplex network body ECU controls FOG relay when signal is received from headlight dimmer switch assembly.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Connect the intelligent tester to DLC3.
  2. Turn the ignition switch ON and push the intelligent tester main switch ON.
  3.  Select the item below in the ACTIVE TEST and then check that the relay operates.

2 INSPECT FOG LIGHT RELAY

INSPECT FOG LIGHT RELAY

  1. Inspect fog light relay continuity.

Standard

Standard

3 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Measure voltage between the terminal B8-7 of the multiplex network body ECU in the instrument panel junction block assembly and body ground.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Voltage

Voltage

4 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Remove the instrument panel junction block assembly.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Measure voltage between each of the terminals as shown in the chart below.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Voltage

Voltage

REPAIR OR REPLACE HARNESS OR CONNECTOR

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Light Control Switch Circuit
DESCRIPTION This circuit detects the state of the headlight dimmer switch. WIRING DIAGRAM INSPECTION PROCEDURE 1 READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to DLC3. ...

Other materials:

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Short to B+ in Front Passenger Side Squib 2nd Step Circuit
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Check component status
(a) Compare the test value with the minimum test limit (MIN LIMIT) and maximum test limit (MAX LIMIT). (b) If the test value is between the minimum test limit and maximum test limit, the component is functioning normally. If not, the component is malfunctioning. The test value is usually sign ...

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