Toyota Tundra. Manual — part 2171

1. PERFORM SPARK TEST

a. Check for DTCs (See DIAGNOSTIC TROUBLE CODE CHART ).

b. Check if sparks occur.

1. Remove the ignition coils and spark plugs (see REMOVAL ).

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.

Fig. 5: Checking Sparks And Ignition
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Perform the spark test according to the procedures below:

1. Check that the wire harness side connector of the ignition coil with igniter is securely

connected.

Result

SPARK TEST RESULT CHART

2. Perform a spark test on each ignition coil with igniter.

1. If there is a cylinder where sparks do not occur, replace its ignition coil with the

NOTE:

If any DTC is present, perform troubleshooting procedures for that
DTC.

NOTE:



Be sure to ground the spark plug when checking.



If the ignition coil has been struck or dropped, replace it.



Do not crank the engine for more than 2 seconds.

Result

Proceed to

NG Connect securely
OK

Go to next step

2009 Toyota Tundra

2009 ENGINE Ignition (3UR-FE) - Tundra

ignition coil of a cylinder where sparks occur normally.

2. Crank the engine and visually check that sparks occur at the cylinder with the normally

operating ignition coil.

Result

SPARK TEST RESULT CHART

3. Check spark plug.

Result

SPARK TEST RESULT CHART

4. Check the power supply to the ignition coil with igniter.

1. Turn the ignition switch ON.

2. Check that there is battery voltage at the ignition coil positive (+) terminal.

Result

SPARK TEST RESULT CHART

5. Check the VVT sensor for intake camshaft (see DTC P0340 CAMSHAFT POSITION

SENSOR CIRCUIT MALFUNCTION; DTC P0342 CAMSHAFT POSITION SENSOR "A"
CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR); DTC P0343 CAMSHAFT
POSITION SENSOR "A" CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR); DTC
P0345 CAMSHAFT POSITION SE ).

6. Check the VVT sensor for exhaust camshaft (see DTC P0365 CAMSHAFT POSITION

SENSOR "B" CIRCUIT (BANK 1); DTC P0367 CAMSHAFT POSITION SENSOR "B"
CIRCUIT LOW INPUT (BANK 1); DTC P0368 CAMSHAFT POSITION SENSOR "B"
CIRCUIT HIGH INPUT (BANK 1); DTC P0390 CAMSHAFT POSITION SENSOR "B"
CIRCUIT (BANK 2); DTC P0 ).

7. Check the camshaft position sensor (see DTC P1340 CAMSHAFT POSITION SENSOR

"A" (BANK 1 SENSOR 2); DTC P1342 CAMSHAFT POSITION SENSOR "A" LOW
INPUT (MRE); DTC P1343 CAMSHAFT POSITION SENSOR "A" HIGH INPUT

Result

Proceed to

OK Replace ignition coil with igniter
NG

Go to next step

Result

Proceed to

NG Replace spark plug
OK

Go to next step

Result

Proceed to

NG Check wiring between ignition switch and ignition coil with igniter
OK

Go to next step

2009 Toyota Tundra

2009 ENGINE Ignition (3UR-FE) - Tundra

(MRE) ).

8. Check the crankshaft position sensor (see DTC P0335 CRANKSHAFT POSITION SENSOR

"A" CIRCUIT; DTC P0337 CRANKSHAFT POSITION SENSOR "A" CIRCUIT LOW
INPUT; DTC P0338 CRANKSHAFT POSITION SENSOR "A" CIRCUIT HIGH INPUT;
DTC P0339 CRANKSHAFT POSITION SENSOR "A" CIRCUIT INTERMITTENT ).

9. Check the IGT signal circuit (see DTC P0351 IGNITION COIL "A"

PRIMARY/SECONDARY CIRCUIT; DTC P0352 IGNITION COIL "B"
PRIMARY/SECONDARY CIRCUIT; DTC P0353 IGNITION COIL "C"
PRIMARY/SECONDARY CIRCUIT; DTC P0354 IGNITION COIL "D"
PRIMARY/SECONDARY CIRCUIT; DTC P0355 IGNITION COIL "E" PRIMARY ).

d. Connect the 8 injector connectors.

e. Install the ignition coils and spark plugs (see INSTALLATION ).

2. INSPECT SPARK PLUG

a. Check the electrode.

1. Using a megohmmeter, measure the insulation resistance.

Standard insulation resistance

SPARK PLUG TESTER CONNECTION SPECIFIED CONDITION CHART

Fig. 6: Using A Meghometer To Measure Insulation Resistance
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the insulation resistance is below the specified range, replace the spark plug.

HINT:

NOTE:



Do not use a wire brush for cleaning.



Do not attempt to adjust the electrode gap of a used spark plug.

Tester Connection

Condition Specified Condition

Spark plug (terminal part) - Body ground Always

10 Mohms or higher

2009 Toyota Tundra

2009 ENGINE Ignition (3UR-FE) - Tundra

If a megohmmeter is not available, perform the following simple inspection instead.

b. Alternative inspection method:

1. Quickly accelerate the engine to 4000 rpm 5 times.

2. Remove the spark plug.

3. 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

SPARK PLUG SPECIFICATION

Fig. 7: Identifying Spark Plug Condition
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d. Check the spark plug electrode gap.

Maximum electrode gap for a used spark plug: 1.3 mm (0.0512 in.)

Fig. 8: Checking Spark Plug Electrode Gap

Manufacturer

Type

DENSO made SK20HR11

2009 Toyota Tundra

2009 ENGINE Ignition (3UR-FE) - Tundra