engine control TOYOTA HILUX 2021 (in English) Service Manual

4967-3. Do-it-yourself maintenance
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QBefore recharging
When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, observe the following before recharging:
O If recharging with the battery installed on the vehicle, be sure to disconnect
the ground cable.
O Make sure the power switch on the charger is off when connecting and dis-
connecting the charger cables to the battery.
Q After recharging/reconnecting the battery (vehicles with smart entry &
start system)
The engine may not start. Follow the procedure below to initialize the system.
Shift the shift lever to P (automat ic transmission) or depress the brake
pedal with the shift lever in N (manual transmission).
Open and close any of the doors.
Restart the engine.
O Unlocking the doors using the smart entry & start system may not be possi-
ble immediately after reconnecting the battery. If this happens, use the wire-
less remote control or the mechanical key to lock/unlock the doors.
O Start the engine with the engine switch in ACCESSORY mode. The engine
may not start with the engine switch turned off. However, the engine will
operate normally from the second attempt.
O The engine switch mode is recorded by the vehicle. If the battery is recon-
nected, the vehicle will return the engine switch mode to the status it was in
before the battery was disconnected. Make sure to turn off the engine
before disconnect the battery. Take extra care when connecting the battery
if the engine switch mode prior to discharge is unknown.
If the system will not start even after multiple attempts, contact any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer.
Q If a symbol of a battery is shown on the multi-information display
There is a malfunction in the vehicle’s charging system.
Immediately stop the vehicle in a safe place and contact any authorized
Toyota retailer or Toyota authorized repai rer, or any reliable repairer. Continu-
ing to drive the vehicle may be dangerous.
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5618-2. Steps to take in an emergency
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When trouble arises
If a tow truck is not available in an emergency, your vehicle may be
temporarily towed using cables or chains secured to the emergency
towing hooks. This should only be attempted on hard surfaced roads
for at most 80 km (50 miles) at under 30 km/h (18 mph).
A driver must be in the vehicle to steer and operate the brakes. The
vehicle’s wheels, drive train, axles, steering and brakes must be in
good condition.
Securely attach cables or
chains to the towing hooks.
Take care not to damage the vehi-
cle body.
Enter the vehicle being towed and start the engine.
If the engine does not start, turn the engine switch to the “ON” position
(vehicles without smart entry & start system) or IGNITION ON mode (vehi-
cles with smart entry & start system).
Vehicles with Stop & Start system:
Before towing the vehicle, turn the engine switch to the “LOCK” position
(vehicles without smart entry & start system) or off (vehicles with smart
entry & start system) once, and then start the engine.
4WD models: Turn the front-wheel drive control switch to H2.
( P. 331)
Shift the shift lever to N and release the parking brake.
When the shift lever cannot be shifted (automatic transmission):
 P. 2 3 7
Emergency towing
Emergency towing procedure
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5678-2. Steps to take in an emergency
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When trouble arises
(Flashes or illuminates)
Malfunction indicator lamp (warning buzzer)
Indicates the followings if the warning light comes on or
flashes:
• Malfunction in the emission control system. (if equipped)
• Malfunction in the electronic engine control system.
• Malfunction in the electronic automatic transmission
control system. (if equipped)
• The boost pressure in the turbocharger is abnormally
high.*3 (diesel engine)
• Malfunction in DPF system. (if equipped)
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The seat belt pretensioner system; or
• The front passenger occupant classification system (if
equipped)
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system (vehicles with VSC system)
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Power steering system warning light (warning buzzer)
(if equipped)
Indicates a malfunction in the power steering system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Warning lightWarning light/Details/Actions

5718-2. Steps to take in an emergency
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When trouble arises
Parking brake indicator light (warning buzzer)*11
Warns the driver to release parking brake.
 Release the parking brake.
Low AdBlue™ level warning light (if equipped)
Indicates that AdBlue™ level is low
 Have AdBlue™ refilled at any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer.
(Flashes)
AUTO LSD indicator (if equipped)
Indicate that the system is temporarily unavailable, due to
the brake system overheats.
 P. 368
Go to service warning light (warning buzzer) (if
equipped)
Indicates a malfunction in the electronic engine control
system or electronic throttle control system.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer.
Warning lightWarning light/Details/Actions

5788-2. Steps to take in an emergency
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Q If “Oil maintenance required soon” is shown
The engine oil is scheduled to be changed.
Check the engine oil, and change if necessary. After changing the engine oil,
the oil change system should be reset. ( P. 491)
For Russia, Armenia, Ukraine, Byelarus, Moldova, Bosnia Herzegovina, Mon-
tenegro, Serbia and Macedonia: You have forgotten to reset the oil change
system. Change the engine oil in accordance with the maintenance schedule.
Q If “Oil maintenance required” is shown
The engine oil is scheduled to be changed.
Check and change the engine oil, and oil filter by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer. After changing
the engine oil, the oil change system should be reset. ( P. 491)
For Russia, Armenia, Ukraine, Byelarus, Moldova, Bosnia Herzegovina, Mon-
tenegro, Serbia and Macedonia: You have forgotten to reset the oil change
system. Change the engine oil in accordance with the maintenance schedule.
Q If “Differential oil temp high Shift to 2WD mode Cooling time required” or
“Differential oil temp high Co oling time required” is shown
The differential oil temperature is too high.
Turn the front-wheel drive control switch to H2, and reduce the vehicle speed
or stop the vehicle in a safe place. ( P. 331)
Q If “Engine oil level low Add or replace” is shown
The engine oil level is low. (This warning message may be displayed if the
vehicle is stopped on a slope. Move the vehicle to a level surface and check
to see if the message goes off.)
Check the level of the engine oil and add or replace oil if necessary.
( P. 479)
Q If “Power turned off to save battery” is shown
Power was turned off due to the automatic power off function.
Next time when starting the engine, increase the engine speed slightly and
maintain that level for approximately 5 minutes to recharge the battery.
Q If “DPF full Manual regeneration required See owner’s manual” is shown
The deposit collected in the filter needs to be regenerated. ( P. 371)
Q If “DPF regeneration in progress” is shown
Regeneration is being automatically carried out by the DPF system.
( P. 370)

5798-2. Steps to take in an emergency
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When trouble arises
QIf a message that indicates the malfunction of front camera is shown
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 271, 566)
O PCS (Pre-Collision System)*
OLDA (Lane Departure Alert With Yaw Assist Function)*
ORSA (Road Sign Assist)*
ODynamic radar cruise control*
*: If equipped
Q If a message that indicates the malfunction of radar sensor is shown
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 271, 566)
O PCS (Pre-Collision System)*
OLDA (Lane Departure Alert With Yaw Assist Function)*
ODynamic radar cruise control*
*: If equipped
Q If “See owner’s manual” is shown
O If the following messages are shown, follow the instructions accordingly.
• “Engine Coolant Temp High Stop in a Safe Place” ( P. 610)
• “Transmission fluid temp high” ( P. 238)
• “Water accumulation in fuel filter” ( P. 499)
• “AdBlue Level Low Fill up AdBlue in 2400 km” ( P. 502)
• “AdBlue level Low No start in 800 km Top up AdBlue” ( P. 502)
• “AdBlue empty Unable to Restart Engine Fill up AdBlue” ( P. 502)
•“DPF full” ( P. 371)
• “Front Camera Temporarily Unavailable” ( P. 271)
O If “Smart Entry & Start System malfunction” is shown, this may be a mal-
function.
Immediately have the vehicle inspected by any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
O If “Low Braking Power Stop in a Safe Place” is shown, there may be a mal-
function. Immediately stop the vehicle in a safe place and contact any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer. Continuing to drive the vehicle may be dangerous.
O If the following messages are shown, there may be a malfunction. Immedi-
ately stop the vehicle in a safe place and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
• “Charging System Malfunction Stop in a Safe Place”
• “Oil Pressure Low Stop in a Safe Place”

5808-2. Steps to take in an emergency
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Q If “Radar Cruise Control Temporarily Unavailable See Owner’s Manual”
is shown
The dynamic radar cruise control system is suspended temporarily or until the
problem shown in the message is resolved. (causes and coping methods:
 P. 271)
Q If “Radar Cruise Control Unavailable” is shown
The dynamic radar cruise control system cannot be used temporarily. Use the
system when it becomes available again.
Q If “Visit your dealer” is shown
The system or part shown on the multi- information display is malfunctioning.
Have the vehicle inspected by any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer immediately.
Q Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location
or audio sound.
WARNING
Q If a warning light comes on or a warning buzzer sounds when a warn-
ing message is shown
Check and follow the message shown on the multi-information display. Fail-
ure to do so may result in death or serious injury.
NOTICE
Q While the engine oil level warning is shown
Continued engine operation with lo w engine oil will damage the engine.
Q If “Water accumulation in fuel filter See owner’s manual” is shown
Never drive the vehicle if the warning message is displayed. Continued driv-
ing with water accumulated in the fuel filter will damage the fuel injection
pump.

6008-2. Steps to take in an emergency
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If the electronic key does not operate properly
(vehicles with smar t entr y & start system)
Use the mechanical key ( P. 148,
150) in order to perform the follow-
ing operations:
Locks all doors
Unlocks all doors
If communication between the electronic key and vehicle is
interrupted ( P. 166) or the electronic key cannot be used
because the battery is depleted, the smart entry & start system
and wireless remote control cannot be used. In such cases, the
doors can be opened and the engine can be started by following
the procedure below.
Locking and unlocking the doors
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6078-2. Steps to take in an emergency
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When trouble arises
QWhen recharging or replacing the battery (vehicles with smart entry &
start system)
O In some cases, it may not be possible to unlock the doors using the smart
entry & start system when the battery is discharged. Use the wireless
remote control or the mechanical key to lock or unlock the doors.
O The engine may not start on the first attempt after the battery has recharged
but will start normally after the second attempt. This is not a malfunction.
O The engine switch mode is memorized by the vehicle. When the battery is
reconnected, the system will return to the mode it was in before the battery
was discharged. Before disconnecting the battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery dis-
charged, be especially careful when reconnecting the battery.
O Vehicles with Stop & Start system: After the battery terminals have been dis-
connected and reconnected or, the battery has been replaced, the Stop &
Start system may not automatically stop the engine for up to an hour.
Q When replacing the battery
O Use a battery that conforms to European regulations.
O Use a battery with the same case size as the previous battery and an equiv-
alent 20 hour rate capacity (20HR) or greater.
• If the sizes differ, the battery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehi-
cle is not used is a short time, the battery may discharge and the engine
may not be able to start.
O Vehicles with Stop & Start system: Use a genuine battery specifically
designed for use with the Stop & Start system or a battery with equivalent
specifications to a genuine battery. If an unsupported battery is used, Stop &
Start system functions may be restricted to protect the battery.
Also, battery performance may decrease and the engine may not be able to
restart. Contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer for details.
O For details, consult any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.

6509-2. Customization
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QRSA (Road Sign Assist)*1 ( P. 295)
*1: If equipped
*2: RSA function becomes on when the engine switch is turned to the “ON”
position (vehicles without smart entry & start system) or IGNITION ON
mode (vehicles with smart entry & start system).
*3: If a speed limit with supplemental mark is exceeded, the notification buzzer
does not operate.
*4: Vehicles with navigation system
QDynamic Radar Cruise Control with Road Sign Assist*
( P. 312)
*: If equipped
FunctionDefault settingCustomized
setting
RSA (Road Sign Assist)*2OnOff–O–
Excess speed notification
method*3Display only
No notification–O–
Display and
buzzer–O–
No overtaking notification
methodDisplay only
No notification–O–
Display and
buzzer–O–
Other notifications method
(No-entry notification)*4Display only
No notification–O–
Display and
buzzer–O–
Excess speed notification
level2 km/h (1 mph)
5 km/h (3
mph)–O–
10 km/h (5
mph)–O–
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FunctionDefault settingCustomized
setting
Dynamic Radar Cruise
Control with Road Sign
Assist
OnOff–O–
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