Ignition System: Testing and Inspection
2UR-FSE IGNITION: IGNITION SYSTEM: ON-VEHICLE INSPECTION
1. SPARK TEST PREPARATION PROCEDURES
(a) Check for DTCs.
NOTICE:
If any DTC is present, perform troubleshooting procedures for that DTC.
(b) Remove the service plug grip Removal.
(c) Remove the 8 spark plugs Removal.
(d) Disconnect the 2 fuel delivery pipe connectors.
(e) Disconnect the 4 injector driver connectors.
HINT
To release each connector lock, push the claw downward ("Release" in the illustration) and move the lock lever ("Move" in the illustration).
(f) Restore the engine to a state in which cranking is possible.
(1) Install the skid control ECU and skid control ECU bracket.
HINT
If a DTC for the hybrid control system is output, the Active Test cannot be performed. Therefore, it is necessary to install the skid control ECU.
(2) Temporarily install the engine oil level dipstick guide with the bolt and insert the dipstick.
NOTICE:
Engine oil will overflow if the spark test is performed with the engine oil level dipstick guide not installed.
(3) Connect the frame wire.
(4) Restore the power supply by connecting the following cables and installing the service plug grip.
Cable to negative battery terminal.
Motor cable.
Generator cable.
CAUTION:
* In order to safely crank the engine, follow the installation precautions for each part.
* The hybrid system uses high voltage circuits. Make sure to perform the procedures properly, as making a mistake can lead to electric shock and/or electric leakage.
NOTICE:
* When performing inspections on electrical systems, take care to prevent burnout due to a short circuit.
* Make sure to securely install the wire harnesses, clamps, brackets, etc.
2. PERFORM SPARK TEST
(a) Install the spark plug to the ignition coil and connect the ignition coil connector.
(b) Ground the spark plug.
(c) Connect the Techstream to the DLC3.
NOTICE:
Check the HV battery voltage in the Data List to ensure that the battery is fully charged.
(d) Turn the power switch on (IG).
(e) Push the Techstream main switch ON.
(f) Enter the following menus: Powertrain / Hybrid Control / Active Test / Compress Test / On.
(g) Depress and hold the brake pedal, and turn the power switch on (READY).
(1) Visually check that sparks occur while the engine is being cranked.
NOTICE:
* 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.
(h) Check that the wire harness side connector of the ignition coil with igniter is securely connected.
Result
(i) 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 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
(j) Inspect the spark plug.
Result
(k) Check the power supply to the ignition coil with igniter.
(1) Turn the power switch on (IG).
(2) Check that there is battery voltage at the ignition coil positive (+) terminal.
Result
(l) Check the VVT sensor.
(1) For intake side, refer to the following procedures P0340.
(2) For exhaust side, refer to the following procedures P0365.
(m) Check the camshaft position sensor P1340.
(n) Check the crankshaft position sensor P0335.
(o) Check the IGT signal circuit P0351.
(p) Disconnect the cable from the negative (-) battery terminal.
(q) Remove the service plug grip.
(r) Remove the skid control ECU and skid control ECU bracket.
(s) Disconnect the frame wire.
(t) Disconnect the motor cable.
(u) Disconnect the generator cable.
(v) Connect the 4 injector driver connectors.
HINT
Move the lock lever in the direction indicated by the arrow to lock the connector.
(w) Connect the 2 fuel delivery pipe connectors.
(x) Install the 8 spark plugs Installation.
(y) Install the service plug grip Installation.
(z) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
3. INSPECT SPARK PLUG
NOTICE:
Do not use a wire brush for cleaning.
(a) Check the electrode.
(1) Using a megohmmeter, measure the insulation resistance.
Standard insulation resistance:
If a megohmmeter is not available, perform the following simple inspection instead.
(b) Alternative inspection method:
(1) Set the vehicle to inspection mode Component Tests and General Diagnostics.
(2) Quickly accelerate the engine to 2500 rpm 5 times.
(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. If not, reinstall the spark plug.
Recommended spark plug:
HINT
Maximum electrode gap for a used spark plug: 1.3 mm (0.0511 in.)
If the gap is greater 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:
Do not adjust the electrode gap of any spark plug, as the ground electrode tip will be damaged.
If the electrode has traces of wet carbon, allow it to dry and then clean it with a spark plug cleaner.
Standard air pressure:
588 kPa (6.0 kgf/cm2, 85 psi)
Standard duration:
20 seconds or less
HINT
Only use the spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner.