Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- If a problem occurs in certain locations or at certain times of day, check for the possibility of wave interference.
- When the electrical key transmitter sub-assembly is brought near the electrical key and TPMS receiver assembly (RF band), front outside door outside handle assembly LH (LF band), indoor electrical key antenna (LF band) or any of the electrical key antennas (LF band), the possibility of wave interference decreases. By doing this, whether wave interference is causing the problem can be checked.
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Entry Interior Alarm does not Sound |
Meter/gauge system |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate |
Power door lock control system |
|
|
Electrical key transmitter sub-assembly |
- |
|
|
Transmitter battery |
- |
|
|
Electrical key and TPMS receiver assembly |
- |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
Harness or connector |
- |
|
|
All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate |
Electrical key transmitter sub-assembly |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
Driver Door Entry Unlock Function does not Operate |
Power door lock control system |
|
|
Front door outside handle assembly LH |
- |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
Harness or connector |
- |
|
|
Driver Door Entry Lock and Unlock Functions do not Operate |
Power door lock control system |
|
|
Front door outside handle assembly LH |
- |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
Harness or connector |
- |
|
|
Driver Door Entry Lock Function does not Operate |
Power door lock control system |
|
|
Front door outside handle assembly LH |
- |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
Harness or connector |
- |
|
|
Room Oscillator does not Recognize Key |
Smart key system (for Start Function) |
|
|
No. 1 indoor electrical key antenna (front floor) |
- |
|
|
No. 2 indoor electrical key antenna (rear floor) |
- |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
Harness or connector |
- |
|
|
Electrical key transmitter sub-assembly |
- |
|
|
New Key cannot be Registered |
Steering lock ECU (steering lock actuator or UPR bracket assembly) |
|
|
Certification ECU (smart key ECU assembly) |
- |
|
|
Engine switch |
- |
|
|
Harness or connector |
- |
|
|
Additional Key cannot be Registered |
Certification ECU (smart key ECU assembly) |
|
|
Electrical key transmitter sub-assembly |
- |
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Operation Check
OPERATION CHECK
1. CHECK SMART KEY SYSTEM (for Entry Function) OPERATION
NOTICE:
Make sure that the smart key system (for Entry Function) has not been canceled
before performing this inspection.
...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Smart key system (for entry function) data and Diagnostic Trouble Codes (DTCs)
can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a ma ...
Other materials:
Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) (C1281,...,C1458)
DESCRIPTION
DTC Code
DTC Detection Condition
Trouble Area
C1281
Stored only during test mode.
Master cylinder pressure sensor circuit
Skid control ECU, master cylinder pressure sensor (master cylinder
s ...
Pressure Sensor Circuit (B1423/23)
DESCRIPTION
This DTC is stored if refrigerant pressure on the high pressure side is extremely
low (176 kPa (1.8 kgf/cm2, 26 psi) or less) or extremely high (3140 kPa (32.0 kgf/cm2,
455 psi) or more). The air conditioner pressure sensor, which is installed on the
pipe on the high pressure side ...
Rear Right Center Sensor Malfunction (C1AE8)
DESCRIPTION
The No. 1 ultrasonic sensor (rear center sensor RH) is installed on the rear
bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic
sensor (rear center sensor RH). If the No. 1 ultrasonic sensor (rear center sensor
RH) has an open circuit or other ma ...
