Ignition system (FA20)
Parts location System information Inspection
ENGINE CONTROL
IGNITION SYSTEM (FA20)
PARTS LOCATION
CIRCUIT FIGURE
ON-VEHICLE INSPECTION
1. Ignition coil ASSY inspection
(1) Input voltage inspection
(a) Disconnect the connector of the ignition coil ASSY.
(b) Turn the ignition switch to ON.
(c) Check the voltage between terminals of the vehicle side connector for the ignition coil ASSY.
Voltage
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| C38-1 - chassis ground |
IG ON |
11 to 14 V |
| C28-1 - chassis ground |
IG ON |
11 to 14 V |
| C39-1 - chassis ground |
IG ON |
11 to 14 V |
| C27-1 - chassis ground |
IG ON |
11 to 14 V |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (ignition coil ASSY connector) |
| *b |
No. 1 cylinder |
| *c |
No. 2 cylinder |
| *d |
No. 3 cylinder |
| *e |
No. 4 cylinder |
(d) Turn the ignition switch to OFF.
2. Spark Inspection
(1) Check the DTC. (Refer to 
)
)CAUTION:
When DTC is detected, perform the troubleshooting for DTC.
(2) Remove 4 ignition coils and 4 spark plugs. (Refer to )
)(3) Use the following procedures to remove the SST.
(a) Using the SST, lift the engine ASSY.
(b) Remove the SST.
SST
18632AA020
(c) Install the two nuts of engine mounting.
Standard value:
Standard value:
Tightening torque=45N·m
{
459kgf·cm}
{33.2ft·lbf}
(4) Remove the 2 bolts, and remove the intake manifold protector (bank 1 side).
(5) Disconnect 2 connectors for the fuel injector and disconnect the clamp.
(6) Install the intake manifold protector (bank 1 side).
(7) Install the injector driver.
NOTE:
Leave 2 upper connectors disconnected.
(8) Disconnect 2 connectors for the fuel injector and disconnect the clamp.
(9) Reconnect the battery ground terminal.
Standard value:
Standard value:
Tightening torque=6.0N·m
{
61kgf·cm}
{4.4ft·lbf}
(10) Install the air cleaner case SUB-ASSY.
(11) Attach the spark plug to the ignition coil ASSY, and connect the connector.
(12) Ground the spark plug.
(13) Check that the ignition spark is fired when the engine is cranked.
CAUTION:
·The ground electrode of the spark plug must be checked with the hexagonal part or threaded part grounded.
·When the ignition coil is exposed to physical shock such as dropping, always replace it with a new one.
·Do not crank the engine for 2 seconds or more.
·When the ignition coil is exposed to physical shock such as dropping, always replace it with a new one.
·Do not crank the engine for 2 seconds or more.
·For models with smart entry & start system, the cranking hold control makes the engine cranking continue for a certain period of time if the engine does not start. When stopping cranking the engine, press the engine switch again.
(14) Check that the connector for the ignition coil ASSY is connected securely.
(15) Inspection of ignition coil ASSY
(a) When there is a cylinder in which the ignition does not occur, replace the ignition coil ASSY for abnormal ignition cylinder with that for normal ignition cylinder.
(17) Inspection of wiring harness and connector for ignition coil ASSY (power supply circuit) (Refer to )
)(18) Inspection of camshaft position sensor
(a) Inspection of intake side (Refer to )
)(b) Inspection of exhaust side (Refer to )
)(19) Inspection of crankshaft position sensor (Refer to )
)(20) Check the IGT signal system circuit. (Refer to )
)(21) Disconnect the battery ground terminal.
(22) Remove the air cleaner case SUB-ASSY.
(23) Remove the three bolts and remove the injector driver.
(24) Remove the 2 bolts, and remove the intake manifold protector (bank 1 side).
(25) Connect 2 connectors for the fuel injector and connect the clamp.
(26) Using 2 bolts, install the intake manifold protector (bank 1 side).
(27) Install the injector driver with the three bolts.
(28) Connect the three connectors with lock and normal connector to the injector driver and move the lock lever as shown in the figure to lock the three connectors with lock.
Captions in illustration
| *1 |
Lock lever |
 |
Connector with lock |
 |
Normal connector |
CAUTION:
For connector with lock, connect the connector securely to lock it.
(29) Connect 2 connectors for the fuel injector and connect the clamp.
(30) Using 2 bolts, install the intake manifold protector (bank 2 side).
(31) Use the following procedures to install the SST.
(a) Remove 2 nuts on the engine mount.
(b) Using the SST, lift the engine ASSY.
(c) Install the SST between engine mount and front crossmember.
SST
18632AA020
(32) Install 4 ignition coils and 4 spark plugs. (Refer to )
)CAUTION:
After the operation is completed, be sure to clear the DTC memory, and then check that no DTCs are detected. (Refer to )
)
3. Spark plug inspection
CAUTION:
·Because the iridium plug is adopted, the gap adjustment is not required.
·Do not scratch the iridium or platinum tip.
·If heavily contaminated with sludge etc., replace the spark plug with a new one.
·When replacing with a new spark plug, do not remove the cap for protecting the tip until the spark plug is installed to the engine.
·If the spark plug is dropped accidentally, replace it with a new one.
·Check the gap visually. Otherwise, the iridium tip may be damaged.
·If damaged, replace the spark plug.
·Do not scratch the iridium or platinum tip.
·If heavily contaminated with sludge etc., replace the spark plug with a new one.
·When replacing with a new spark plug, do not remove the cap for protecting the tip until the spark plug is installed to the engine.
·If the spark plug is dropped accidentally, replace it with a new one.
·Check the gap visually. Otherwise, the iridium tip may be damaged.
·If damaged, replace the spark plug.
NOTE:
Plug type and gap
| Manufacturer |
Type |
Reference value [mm {in}] (plug gap [new]) |
Reference value [mm {in}] (maximum plug gap [used]) |
|---|---|---|---|
| DENSO |
ZXE27HBR8 |
0.7 to 0.8 {0.028 to 0.031} |
1.0 {0.039} |
Captions in illustration
| *1 |
0.7 to 0.8 mm {0.028 to 0.031 in} |
| *2 |
Iridium tip |
| *3 |
Platinum tip |
(1) Visual inspection
(a) Start the engine.
(b) Race the engine 5 times by acceleration and deceleration at high engine speed (4000 r/min).
(c) Remove the spark plug.
(d) Check the electrode (iridium, platinum tip), threaded portion and insulator of the spark plug for damage.