Toyota Tacoma (2015-2018) Service Manual: Cooling System
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT FOR COOLANT LEAK
CAUTION:
Do not remove the radiator cap sub-assembly, cylinder block drain cock plug or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
(a) Remove the radiator cap sub-assembly.
(b) Fill the radiator assembly with engine coolant and install a radiator cap tester.
(c) Warm up the engine.
(d) Using the radiator cap tester, increase the pressure inside the radiator assembly to 118 kPa (1.2 kgf/cm2, 17 psi), and then check that the pressure does not drop.
If the pressure drops, check the hose, radiator assembly and engine water pump assembly for leakage. If no external leakage is found, check the heater core, cylinder block sub-assembly and cylinder head sub-assembly.
(e) Remove the radiator cap tester.
(f) Install the radiator cap sub-assembly.
2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR
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(a) The engine coolant should be between the LOW and FULL lines when the engine is cold. Text in Illustration
If the engine coolant is below the LOW line, check for leakage and add TOYOTA Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology to the FULL line. NOTICE: Never use water as a substitute for engine coolant. |
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3. INSPECT ENGINE COOLANT QUALITY
CAUTION:
Do not remove the radiator cap sub-assembly, cylinder block drain cock plug or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
(a) Remove the radiator cap sub-assembly.
(b) Check for excessive deposits of rust or scales around the radiator cap sub-assembly and radiator filler hole. Also, the engine coolant should be free of oil.
If the engine coolant is excessively dirty, replace the engine coolant.
(c) Install the radiator cap sub-assembly.
Coolant
Replacement
REPLACEMENT
PROCEDURE
1. REMOVE NO. 2 ENGINE UNDER COVER SUB-ASSEMBLY (w/ Off Road Package)
2. REMOVE NO. 1 ENGINE UNDER COVER SUB-ASSEMBLY
3. DRAIN ENGINE COOLANT
CAUTION:
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Radiator
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Other materials:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the air conditioning system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
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Zero Point Calibration of Yaw Rate Sensor Undone (C1210,C1336)
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the yaw
rate and acceleration sensor (airbag sensor assembly) via the CAN communication
system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and
detects the vehicle condition. If th ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL AIR CONDITIONER PRESSURE SENSOR
(a) Remove the vinyl tape from the air conditioner tube and accessory assembly
and connecting part of the air conditioner pressure sensor.
(b) Apply sufficiently compressor oil to a new O-ring and fitting surface of
the air co ...
