Ignition Coil: Testing and Inspection
Igniter1. Carry out spark test.
Ignition Coil Operation Inspection
1. Disconnect the negative battery cable.
2. Inspect the ignition coil power supply voltage (terminal 1A and 2A).
- If not as specified, inspect the power supply system harness (Ignition coil terminal 1A, 2A and ignition switch, including short cord.)
Specification
+B
3. Inspect the ignition coil (terminal 1C and 2C) ground voltage.
- If not as specified, inspect the ground system harness (Ignition coil terminal 1C, 2C and body ground.)
Specification
0 V
4. Pull the ignition coil connector 1D and 2D out using a pin tool (terminal disconnector).
5. Remove the spark plug, high-tension lead and ignition coil.
6. Connect the SSTs (NGS tester) shown in the figure.
NOTE:
- Using the signal simulation of SST apply a pseudo-pulse to the ignition coil and inspect its operation.
- Disconnect the ignition coil terminal 1D and 2D from the connectors in advance.
7. Connect the negative battery cable.
8. Turn the ignition switch to ON.
9. Prepare the SST (NGS tester) in the following procedure.
1. Move the cursor to DIGITAL MEASUREMENT SYSTEM.
2. Press the TRIGGER key to enter this selection.
3. Move the cursor to SIGNAL SIMULATION.
4. Press the TRIGGER key to enter this selection.
5. Move the cursor and set the following:
Set value
FREQUENCY: 50 Hz
LOW LEVEL: 0 V
HIGH LEVEL: 5 V
DUTY CYCLE: 50 %
COUPLING: DC
WARNING: Do not hold the spark plug, high-tension lead, or ignition coil while inspecting the ignition coil. You may be subjected to a strong shock.
NOTE: No.1 and No.4 cylinders and No.2 and No.3 cylinder are ignited simultaneously.
6. Press START.
10. Verify that the spark plug produces a strong, pale spark when the cable from the SIG terminal of the SST (NGS tester) is connected to the ignition coil terminal 1D and 2D.
- If not as specified, replace the ignition coil.
Secondary Coil Winding
1. Disconnect the high-tension leads.
2. Measure the resistance from lead hole 1 to 4, and lead hole 2 to 3 using an ohmmeter.
- If not as specified, replace the ignition coil.
Specification
8.2 - 12.36 kOhms [20 °C {68 °F}]