Toyota Tundra. Manual — part 2161

Fig. 4: Ignition System Diagram (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

ON-VEHICLE INSPECTION

2009 Toyota Tundra

2009 ENGINE Ignition (1GR-FE) - Tundra

1. PERFORM SPARK TEST

a. Check for DTCs Refer to 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 2 fuel pump ECU connectors.

4. Ground the spark plug.

5. Visually check that sparks occur while the engine is being cranked.

c. Spark test flowchart.

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

connected.

SPARK TEST RESULT CHART

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

1. Replace ignition coil with igniter with a normal one.

2. Perform spark test again.

SPARK TEST RESULT CHART

3. Check power supply to ignition coil with igniter.

1. Turn the ignition switch ON.

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

SPARK TEST RESULT CHART

NOTE:

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

NOTE:



Be sure to ground the spark plug when checking.



Replace the ignition coil if it receives an impact.



Do not crank the engine for more than 2 seconds.

Result

Proceed to

NG Connect securely
OK

Go to next step

Result

Proceed to

OK Replace ignition coil with igniter
NG

Go to next step

Result

Proceed to

NG Check wiring between ignition switch and ignition coil with igniter

2009 Toyota Tundra

2009 ENGINE Ignition (1GR-FE) - Tundra

4. Check the resistance of the VVT sensor. Refer to 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 .

5. Check the resistance of the crankshaft position sensor. Refer to INSPECTION .

d. Install the ignition coils and spark plugs. Refer to INSTALLATION.

e. Connect the 2 fuel pump ECU connectors.

2. CHECK SPARK PLUG

a. Remove the ignition coil.

b. Remove the spark plug.

c. Check the electrode.

1. Using a megohmmeter, measure the insulation resistance.

Correct insulation resistance: 10 Mohms or higher

Fig. 5: Measuring Insulation Resistance
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:

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

d. 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.

OK

Go to next step

2009 Toyota Tundra

2009 ENGINE Ignition (1GR-FE) - Tundra

Fig. 6: Identifying Spark Plug
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e. Check the spark plug for any damage on its threads and insulator.

If there is damage, replace the spark plug. If not, reinstall the spark plug.

Recommended spark plug

SPARK PLUG SPECIFICATION

Fig. 7: Cleaning Electrode With Spark Plug Cleaner
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

f. Clean the spark plugs.

g. Check the spark plug electrode gap.

Manufacturer

Product

DENSO made K20HR-U11

2009 Toyota Tundra

2009 ENGINE Ignition (1GR-FE) - Tundra