Toyota Previa 1991-1997 Repair Information

Clearing Codes

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2TZ-FE Engine

Engine and Automatic Transmission

See Figure 1

After repair of the circuit, the diagnostic code(s) must be removed from the ECM memory. With the ignition turned OFF , remove the 15 amp EFI fuse for 30 seconds or more. Once the time period has been observed, reinstall the fuse and check for normal code output.



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Fig. Fig. 1: The EFI fuse is located in the fuse box in the dash, check your owners manual for exact position

If the diagnostic code is not erased, it will be retained by the ECM and appear along with a new code in event of future trouble.

Cancellation of the trouble code can also be accomplished by disconnecting the negative battery cable. However, disconnecting the battery cable will erase the other memory systems including the clock and radio settings. If this method is used, always reset these components once the trouble code has been erased.

2TZ-FZE ENGINE



Engine and Automatic Transmission

See Figure 1

The OBDII scan tool can clear DTC's, refer to the owners manual, or refer to the next few steps.

After repair of the circuit, the diagnostic code(s) must be removed from the ECM memory. With the ignition turned OFF , remove the 15 amp EFI fuse for 30 seconds or more. Once the time period has been observed, reinstall the fuse and check for normal code output.

If the diagnostic code is not erased, it will be retained by the ECM and appear along with a new code in event of future trouble.

Cancellation of the trouble code can also be accomplished by disconnecting the negative battery cable. However, disconnecting the battery cable will erase the other memory systems including the clock and radio settings. If this method is used, always reset these components once the trouble code has been erased.

 
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