Toyota Tacoma (2015-2018) Service Manual: Headlight Dimmer Switch
Headlight Dimmer Relay
Inspection
INSPECTION
PROCEDURE
1. INSPECT HEADLIGHT DIMMER RELAY
(a) Check the resistance.
(1) Measure the resistance according to the value(s) in the table below.
Standard:
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Components
COMPONENTS
ILLUSTRATION
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Other materials:
Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial
Data) Invalid (B279986)
DESCRIPTION
When there are communication malfunctions between the ECM and certification ECU
(smart key ECU assembly), or when the communication ID codes do not match, the ECM
stores this DTC.
DTC Code
DTC Detection Condition
Trouble Area
DTC Output C ...
Precaution
PRECAUTION
1. EXPRESSIONS OF IGNITION SWITCH
HINT:
The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch
(Position)
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Stop Light Relay Circuit (C1A4B)
DESCRIPTION
The skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake
actuator assembly)*2 sends a stop light operation request signal to the stop light
relay (stop light switch assembly). If the skid control ECU (master cylinder solenoid)*1
or skid control ECU (brake actua ...
