Toyota Previa 1991-1997 Repair Information

Diagnosis and Testing

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NO START TEST



See Figures 1 through 5

  1. First, conduct a spark test as follows.
  2.  
  3. On the 2TZ-FZE engines, remove the exhaust pipe heat insulator.
  4.  
  5. Disconnect the coil wire from distributor. Hold the coil wire end about 1 / 2 inch (12.5mm) from a good body ground; check if spark occurs while engine is being cranked.
  6.  

Crank the engine for no more than 2 seconds at a time to prevent flooding the engine with gasoline.

  1. If good spark does not occur (should be bright blue), follow the correct diagnostic flow chart (engine and year) and necessary service procedures. If good spark does occur, the ignition system is probably not at fault.
  2.  



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Fig. Fig. 1: No start test chart-1991-93 models



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Fig. Fig. 2: No start test chart-1994-95 2TZ-FE engine



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Fig. Fig. 3: No start test chart-1994-95 2TZ-FZE engine



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Fig. Fig. 4: No start test chart-1996 engines



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Fig. Fig. 5: No start test chart-1997 engines

SIGNAL GENERATOR AIR GAP INSPECTION



See Figures 6 and 7

The air gap in the distributor should be check periodically. Distributor air gap may only be checked and can only be adjusted by component replacement.

Remove the hold-down bolts from the top of the distributor cap.

  1. Remove the distributor cap from the housing without disconnecting the ignition wires.
  2.  
  3. Pull the ignition rotor (not the signal rotor) straight up and remove it. If the contacts are worn, pitted or burnt, replace it. Do not file the contacts.
  4.  
  5. Turn the crankshaft (a socket wrench on the front pulley bolt may be used to do this) until a tooth on the signal rotor aligns with the projection of the pick-up coil.
  6.  

Using a non-ferrous feeler gauge (brass, copper or plastic) measure the gap between the signal rotor and the pick-up coil projection. DO NOT USE AND ORDINARY METAL FEELER GAUGE! The gauge should just 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)
 



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Fig. Fig. 6: Measure the air gap in this position with a non-ferrous feeler gauge-2TZ-FE engines



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Fig. Fig. 7: Measure the air gap in this position with a non-ferrous feeler gauge-2TZ-FZE engines

  1. If the air gap is not within specifications, replace the IIA distributor housing.
  2.  
  3. Check to make sure the housing gasket is in position on the housing.
  4.  
  5. Install the rotor.
  6.  
  7. Install the distributor cap with attached wiring. Attach the cap to the housing and tighten the hold-down bolts.
  8.  

 
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