Toyota Tundra (2015 year). Manual — part 1776
3UR-FBE IGNITION: IGNITION SYSTEM: SYSTEM DIAGRAM; 20...
Last Modified: 9-16-2014
6.6 G
Doc ID: RM000002N0603XX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE IGNITION: IGNITION SYSTEM: ON-VEHICLE INSPECTION; 2015 MY Tundra [08/2014 - ]
ON-VEHICLE INSPECTION
1. PERFORM SPARK TEST
(a) Check for DTCs
.
NOTICE:
If any DTC is present, perform troubleshooting procedures for that DTC.
(b) Check if sparks occur.
(1) Remove the ignition coils and spark plugs
.
(2) Install the spark plug to the ignition coil and connect the ignition coil connector.
(3) Disconnect the 8 injector connectors.
(4) Ground the spark plug.
(5) Visually check that sparks occur while the engine is being cranked.
NOTICE:
cranking.
If an ignition coil assembly is struck or dropped, replace it with a new one.
If a spark plug is struck or dropped, replace it with a new one.
2. INSPECT IGNITION COIL AND SPARK PLUG
(a) Spark test flowchart.
RESULT
PROCEED TO
NG
Connect securely
OK
Go to next step
(2) Perform a spark test on each ignition coil with igniter.
If there is a cylinder where sparks do not occur, replace its ignition coil with the ignition
Crank the engine and visually check that sparks occur at the cylinder with the normally
operating ignition coil.
2.
3UR-FBE IGNITION: IGNITION SYSTEM: ON-VEHICLE INSPECT...
Result
RESULT
PROCEED TO
OK
Replace ignition coil with igniter
NG
Go to next step
(3) Check the power supply to the ignition coil with igniter.
Turn the ignition switch to ON.
1.
Check that there is battery voltage at the ignition coil positive (+) terminal.
2.
Result
RESULT
PROCEED TO
NG
Check wiring between ignition switch and ignition coil with igniter
OK
Go to next step
(4) Check spark plug.
Result
RESULT
PROCEED TO
NG
Replace spark plug
OK
Inspect the ignition system
NOTICE:
If an ignition coil assembly is struck or dropped, replace it with a new one.
If a spark plug is struck or dropped, replace it with a new one.
(b) Connect the 8 injector connectors.
(c) Install the ignition coils and spark plugs
.
3. INSPECT SPARK PLUG
NOTICE:
(1) Using a megohmmeter, measure the insulation
resistance.
Standard Insulation Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
Spark plug (terminal part) -
Body ground
Always
10 MΩ or higher
If the insulation resistance is below the specified range,
replace the spark plug.
HINT:
If a megohmmeter is not available, perform the following
simple inspection instead.
3UR-FBE IGNITION: IGNITION SYSTEM: ON-VEHICLE INSPECT...
(b) Alternative inspection method:*
(1) Start the engine.*
(2) Quickly accelerate the engine to 4000 rpm 5 times.*
NOTICE:
*: Do not perform this step if P0300 (misfire detection) or a related DTC is stored.
(3) Remove the spark plug.
(4) Visually check the spark plug.
If the electrode is dry, the spark plug is functioning
properly. If the electrode is damp, proceed to the next
step.
(c) Check the spark plug for any damage to its threads and insulator.
If there is any damage, replace the spark plug.
Recommended Spark Plug:
MANUFACTURER
TYPE
DENSO made
SK20HR11
(d) Check the spark plug electrode gap.
Maximum electrode gap for a used spark plug:
1.3 mm (0.0512 in.)
If the gap is more than the maximum, replace the spark plug.
Electrode gap for a new spark plug:
1.0 to 1.1 mm (0.0394 to 0.0433 in.)
NOTICE:
3UR-FBE IGNITION: IGNITION SYSTEM: ON-VEHICLE INSPECT...
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