Toyota Tundra 2005 Service - Repair - Maintenance page 2109

IGNITION SYSTEM
ON−VEHICLE INSPECTION
NOTICE:
"Cold" and "Hot" in this section mean the temperature of the coils themselves. "Cold" is from −10_C
(14_F) to 50_C (122_F) and "Hot" is from 50_C (122_F) to 100_C (212_F).
1. INSPECT IGNITION COIL AND SPARK TEST
(a) Confirm DTCs.
NOTICE:
If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC.
(b) Check that spark occurs.
(1) Remove the ignition coils.
(2) Using a 16 mm (0.63 in) plug wrench, remove the spark plugs.
(3) Install the spark plugs to each ignition coil, and connect the ignition coil connectors.
(4) Disconnect the 6 injector connectors.
(5) Ground the spark plugs.
(6) Check if spark occurs while the engine is being cranked.
NOTICE:
S
Be sure to ground the spark plugs when checking.
S
Replace the ignition coil when subjected to an impact.
S
Do not crank the engine for more than 2 seconds.
If spark does not occur, do the test as follows:
SPARK TEST
NG
CHECK CONNECTION OF IGNITION COIL
CONNECTOR
OK
CHANGE IT TO A NORMAL IGNITION COIL AND
PERFORM SPARK TEST AGAIN
NG
CHECK POWER SUPPLY TO IGNITION COIL
1. Turn the ignition switch to the ON position.
2. Check that there is battery positive voltage at the ignition coil posi-
tive (+) terminal.
OK
CHECK VVT SENSOR
(See page DI−209)
OK
CHECK RESISTANCE OF CRANKSHAFT POSITION
SENSOR (See page DI−203)
Cold
1,630 to 2,740 Ω 2,065 to 3,225 Ω
Resistance:
OK
CHECK IGT SIGNAL FROM ECM
(See page DI−216)
OK
REPAIR WIRING BETWEEN IGNITION COIL AND ECM
IGNITION (1GR−FE) − IGNITION SYSTEM
Hot
NG
Connect securely.
OK
Replace the ignition coil.
NG
Check wiring between the ignition switch
and ignition coil.
NG
Check wiring between the VVT sensor
and ECM.
OK
Repair wiring between the VVT sensor
and ECM.
Replace the VVT sensor.
NG
Replace the crankshaft position sensor.
NG
Check the ECM (See page DI−1).
IG−1
IG0MI−01
NG