TOYOTA PREVIA 91-97 REPAIR MANUAL

2-4 ENGINE ELECTRICAL

0.2 - 0.5mm

Fig. 8 Measure the air gap in this position with a non-ferro is

feeler gauge—2TZ-FZE engines

Fig. 9 Using an ohmmeter to test the primary resistance of the

positive and negative terminals on the ignition coil

4. Turn the crankshaft (a socket wrench on the front pulley bolt fnay be
   used to do this) until a tooth on the signal rotor aligns with the projection
   of the pick-up coil.


5. Using a non-ferrous feeler gauge (brass, copper or plastic) rrjeasure
   the gap between the signal rotor and the pick-up coil projection. DO; NOT
   USE AND ORDINARY METAL FEELER GAUGE! The gauge should ji$t touch
   either side of the gap (snug fit). The acceptable range for the air gap is as
   follows:
   . 1991-92 models—0.008-0.016 inch (0.20-0.40mm)
   . 1993-97 models—0.008-0.020 inch (0.20-0.50mm)


6. If the air gap is not within specifications, replace the IIA distributor
   housing.


7. Check to make sure the housing gasket is in position on the dousing.


8. Install the rotor.


9. Install the distributor cap with attached wiring. Attach the capito the
   housing and tighten the hold-down bolts.

Ignition Coil

TESTING

I See Figures 9 and 10

1. Disconnect the negative battery cable.


2. Disconnect the plug wire from the ignition coil. A clip is on tr
   the wire, release the clip and pull to separate.


3. Clean and inspect for the following on the coil:

• Cracks or damages


• Check the terminals for carbon tracks


• Check the coil wire for holes or carbon deposits and corrosior

4. Using an ohmmeter, check the primary resistance between
   positive and negative terminals. Resistance should be as follows
   cold:

• 1991—0.4-0.5 ohms.


• 1992—0.3-0.6 ohms


• 1993-97—0.36-0.55 ohms

5. If the resistance is not within specifications, replace the coil.


6. To check the secondary resistance, measure the resistance be
   the positive terminal of the coil and the terminal. Resistance should
   within the following when cold:

• 1991—10-14 kilohms.


• 1992-93—9-15 kilohms


• 1994-97—9.0-15.4 kilohms

Fig. 10 Secondary resistance is check by testing the high-ten-

sion terminal and positive leads

tip of

e

hen

/veen

e

7. If the resistance is not within specifications, replace the coil.


8. Connect the negative battery cable and reset any digital eguipment
   such as the radio.

REMOVAL & INSTALLATION

I See Figures 11,12,13 and 14

The ignition coil is located under the passenger side floor near the dis-

tributor. Access is better from under the vehicle.

1. Turn the ignition key to the OFF position. Disconnect the negative
   battery cable.


2. Remove the exhaust pipe heat insulator if necessary.


3. Disconnect the high tension wire (running between the coil and the
   distributor) from the coil.


4. Disconnect the low tension wires from the coil.


5. Loosen the coil bracket and remove the coil.
   To install:


6. Install the new coil and secure the bracket.


7. Attach the low tension wires first, then the coil wire.


8. Install the exhaust heat insulator if removed.