See Figures 1, 2, 3 and 4
Prior to testing the coil, perform a secondary spark test. If spark occurs at the spark plug, the coil is functioning properly.
The ignition coil is found in the distributor on all models except the 2VZ-FE, 3VZ-FE and 1994-95 California 5S-FE and 1996 5S-FE engines. On most of these engines the coil is located on the left fender well, near the fuse block.
- Turn the ignition key to the OFF position.
- Perform a visual inspection of the coil. If the coil is cracked, damaged or oil is leaking from the coil, the coil is faulty.
- Label and disconnect the electrical harness from the ignition coil.
- Inspect the harness connector and ignition coil terminals for dirt, corrosion or damage. Repair as necessary.
Using an ohmmeter, measure coil primary resistance between the ignition coil terminals. Resistance cold should be approximately:
2S-ELC engine; 1983-86 US-0.3-0.5 ohms
- Measure coil secondary resistance between the ignition coil terminals and the distributor cap high tension lead terminals. Resistance cold should be approximately:
- If resistance is not within specification, the coil may be faulty.
REMOVAL & INSTALLATION
- Turn the ignition key to the OFF position. Disconnect the negative battery cable. Wait at least 90 seconds from the time the negative battery was disconnected to start work.
- Disconnect the high tension wire or coil wire (running between the coil and the distributor) from the coil.
- Disconnect the low tension wires from the coil.
- Loosen the coil bracket and remove the coil.
- Install the new coil and securely tighten the bracket.
- Attach the low tension wires first, then the coil wire. Reconnect the battery cable.
- Reset any various digital equipment such as radio memory and the clock if necessary.
See Figures 5, 6, 7, 8 and 9
The internal coil found within the distributor and can be changed without removing the distributor (a selection of various short screwdrivers may be required for access to the screws) but it is recommended to remove the distributor and then replace the coil assembly.
- Disconnect the negative battery cable.
- Lable and disconnect the distributor wiring.
- Lable and disconnect the vacuum advance hoses (if equipped).
- Lable and disconnect the plug wires from the distributor.
- Mark the location of the distributor. Remove the hold-down bolts and pull out the distributor.
- Mark the location and remove the distributor rotor with O-ring (if equipped). Discard the O-ring.
- Remove the dust cover(s) over the ignition coil.
Note position and routing of all internal distributor assembly wiring.
- Remove the nuts and disconnect the wiring from the ignition coil.
- Remove the screws and the ignition coil and gasket from the distributor.
- Install the ignition coil, gasket, screws and secure its wiring. Again, watch the wiring positions.
- Install a new gasket to the housing when attaching the dust cover.
- Install the distributor rotor.
- Set the No. 1 cylinder to TDC of the compression stroke. Turn the crankshaft clockwise, and position the slit of the intake camshaft as shown in distributor Removal and Installation.
- Apply a light coat of engine oil to the new O-ring and install it to the distributor housing. align the cutout portion of the coupling with the protrusion of the housing. Insert the distributor, aligning the center of the flange with that of the bolt hole on the cylinder head. Lightly tighten the 2 mounting bolts.
- Attach the spark plug wires to the distributor cap.
- Connect the wiring to the distributor. Connect the negative battery cable.
- Warm up the engine to reach operating temperature and adjust the timing.
- Reset any digital equipment such as radio memory and the clock if necessary.