Toyota Tundra (2015 year). Manual — part 2096
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
A30-2 - Body ground
Light control switch TAIL, front fog light switch ON
11 to 14 V
Light control switch TAIL, front fog light switch OFF
Below 1 V
(b) for RH:
(1) Disconnect the A31 front fog light connector.
(2) Measure the voltage according to the value(s) in the table below.
Standard voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
A31-2 - Body ground
Light control switch TAIL, front fog light switch ON
11 to 14 V
Light control switch TAIL, front fog light switch OFF
Below 1 V
NG
GO TO STEP 4
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
(FRONT FOG LIGHT BULB - BODY GROUND)
4.
INSPECT FOG LIGHT RELAY (FOG)
(a) Remove the fog light relay from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER
CONNECTION
CONDITION
SPECIFIED
CONDITION
3 - 5
When battery voltage is not
applied to terminals 1 and 2
10 kΩ or higher
When battery voltage is applied
to terminals 1 and 2
Below 1 Ω
LIGHTING: LIGHTING SYSTEM: Front Fog Light Circuit; 2015 MY ...
OK
OK
NG
REPLACE FOG LIGHT RELAY
5.
CHECK HARNESS AND CONNECTOR (FOG LIGHT RELAY - BATTERY)
(a) Remove the fog light relay from the engine room relay block.
(b) Measure the voltage according to the value(s) in the table
below.
Standard voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
Fog light relay terminal 1 -
Body ground
Light control
switch TAIL
11 to 14 V
Fog light relay terminal 3 -
Body ground
Always
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
CHECK HARNESS AND CONNECTOR (FR FOG RELAY - FRONT FOG LIGHT BULB)
LIGHTING: LIGHTING SYSTEM: Front Fog Light Circuit; 2015 MY ...
OK
*1: for LH
*2: for RH
(a) Remove the fog light relay from the engine room relay block.
(b) Disconnect the A30*1 and A31*2 front fog light connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Fog light relay terminal 5 - A30-2*1
Always
Below 1 Ω
Fog light relay terminal 5 - Body ground*1
Always
10 kΩ or higher
Fog light relay terminal 5 - A31-2*2
Always
Below 1 Ω
Fog light relay terminal 5 - Body ground*2
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
7.
CHECK FRONT FOG LIGHT
LIGHTING: LIGHTING SYSTEM: Front Fog Light Circuit; 2015 MY ...
(a) Disconnect the J4 ECU connector.
(b) Using a service wire, connect J4-4 (FFGO) on the wire harness
side and body ground.
(c) Check that the front fog light illuminates.
OK:
Front fog light illuminates.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
(FOG LIGHT RELAY - MAIN BODY ECU)
OK
REPLACE MAIN BODY ECU
LIGHTING: LIGHTING SYSTEM: Front Fog Light Circuit; 2015 MY ...
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