Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: While Alarm is Armed, Engine Hood is opened but Alarm does not Sound

Toyota Tacoma (2015-2018) Service Manual / Theft Deterrent / Theft Deterrent System / While Alarm is Armed, Engine Hood is opened but Alarm does not Sound

DESCRIPTION

A situation in which the alarm is armed but does not sound when the hood is opened can be caused when the main body ECU (multiplex network body ECU) cannot detect whether the hood courtesy switch is open or closed.

If the alarm does not sound, there may be a malfunction in the hood courtesy switch, main body ECU (multiplex network body ECU) or a wire harness.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration (See page ).*1

  • *1: w/ Smart Key System

PROCEDURE

1.

CHECK SECURITY INDICATOR LIGHT OPERATION

(a) Close all doors and the hood.

(b) Lock the doors using the wireless operation*1, key linked operation or entry operation*2.

  • *1: w/ Wireless Door Lock System
  • *2: w/ Smart Key System

(c) Check that the security indicator light illuminates.

(d) After 30 seconds have elapsed, check that the security indicator light changes from illuminated to flashing.

HINT:

The illumination status of the security indicator light can be used to determine whether the theft deterrent system is set or unset.

NG

GO TO THEFT DETERRENT SYSTEM CANNOT BE SET OR UNSET

OK

2.

READ VALUE USING TECHSTREAM (HOOD COURTESY SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body

Tester Display

Measurement Item / Range

Normal Condition

Diagnostic Note

Hood Courtesy SW

Hood courtesy switch / ON or OFF

ON: Hood open

OFF: Hood closed

-

OK:

The Techstream display changes correctly in response to the hood courtesy switch (hood lock assembly) status.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

3.

INSPECT HOOD LOCK ASSEMBLY

(a) Remove the hood lock assembly (See page ). ).

(b) Inspect the hood lock assembly (See page ). ).

NG

REPLACE HOOD LOCK ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (HOOD LOCK ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the E25 hood lock assembly connector.

(b) Disconnect the M6 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E25-1 - M6-11 (HCTY)

Always

Below 1 Ω

E25-2 - Body ground

Always

Below 1 Ω

E25-1 or M6-11 (HCTY) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

While Alarm is Armed, Battery is Reconnected but Alarm does not Sound
DESCRIPTION While the alarm is armed, the EEPROM inside the main body ECU (multiplex network body ECU) will remember the armed state even if the battery is disconnected, and the alarm will sound ...

Window / Glass
...

Other materials:

Blind Spot Monitor Slave Module Beam Axis Inspection Incomplete (C1ABC)
DESCRIPTION This DTC is stored when a beam axis inspection has not been performed for the blind spot monitor sensor RH. HINT: This DTC is always stored after replacing a blind spot monitor sensor. The purpose of this DTC is to ensure that beam axis inspection is performed. Completing the be ...

Installation
INSTALLATION PROCEDURE 1. INSTALL INSTRUMENT PANEL SUB-ASSEMBLY (a) Engage the 5 guides to install the instrument panel sub-assembly. (b) Engage the clamps and connect the connectors. (c) Install the nut <G>. (d) Install the 8 bolts <A>. (e) Install the 2 bolts <B> or 2 bo ...

Identification Information
Vehicle Identification And Serial Numbers VEHICLE IDENTIFICATION AND SERIAL NUMBERS 1. VEHICLE IDENTIFICATION NUMBER (a) The vehicle identification number is stamped on the vehicle body and on the certification label, as shown in the illustration. A: Vehicle Identification Number B: C ...

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