Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the causes of the problem symptom. 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.
Cruise Control System

Symptom

Suspected Area

See page

Main switch cannot be turned ON (Indicator light on the combination meter does not come on)

Cruise Control Switch Circuit

Cruise Main Indicator Light Circuit

ECM

Desired speed cannot be set (Indicator light on the combination meter comes on when the main switch is turned ON, but goes off when operating the "SET" function)

Cruise Control Switch Circuit

ECM

Desired speed cannot be set (Indicator light on the combination comes on when the main switch is turned ON and it remains ON, while operating the "SET" function)

Cruise Control Switch Circuit

Lighting System

Clutch Switch Circuit (for Manual Transmission)

Park/neutral Position Switch Circuit (for AC60E Automatic Transmission)

Park/neutral Position Switch Circuit (for AC60F Automatic Transmission)

Combination Meter System

ECM

While cruise control driving, the set speed is canceled (Indicator light remains ON)

Cruise Control Switch Circuit

Vehicle Speed Sensor Circuit

Lighting System

Cruise Main Indicator Light Circuit

Clutch Switch Circuit (for Manual Transmission)

Park/neutral Position Switch Circuit (for AC60E Automatic Transmission)

Park/neutral Position Switch Circuit (for AC60F Automatic Transmission)

ECM

Hunting occurs (Speed is not constant)

Vehicle Speed Sensor Circuit

ECM

Speed setting cannot be canceled ("CANCEL" function failure only)

Cruise Control Switch Circuit

ECM

DTC is not output, or is output when should not be

TC and CG Terminal Circuit

ECM

Cruise Main indicator light does not come on

Cruise Control Switch Circuit

Cruise Main Indicator Light Circuit

ECM

Combination Meter Assembly

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedures to troubleshoot the cruise control system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGH ...

Road Test
ROAD TEST HINT: 'SET' and '-', 'RES' and '+', 'ON-OFF' functions share the same switch. Operate the cruise control main switch according to the directions i ...

Other materials:

Automatic High Beam System does not Operate or Operation Indicator does not Illuminate
DESCRIPTION The main body ECU (multiplex network body ECU) controls the automatic high beam system based on signals received from the forward recognition camera. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the combination meter assembly, always replace it with ...

Engine (ignition) switch
■ Engine switch LOCK The steering wheel is locked and the key can be removed. (Vehicles with an automatic transmission: The key can be removed only when the shift lever is in P.) ACC Some electrical components such as the audio system can be used. ON All electrical components can ...

Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and freeze frame data. HINT: DTCs which are sto ...

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