TOYOTA PREVIA 91-97 REPAIR MANUAL

4-32 DRIVEABILITY AND EMSSIONS CONTROLS

TOYOTA Hand-Held T

DLC3

Fig. 100 The DLC3 is located in the fuse box at the center

portion of the instrument panel

pper

Reading Codes

2TZ-FE ENGINE

Engine

> See Figures 101,102,103 and 104

All models equipped with the 1991-95 2TZ-FE engines utilize tr OBD!

system.

1. Make sure the battery voltage is at least 11 volts.


2. Make sure the throttle valve is fully closed.


3. Place the gear shift lever in Neutral. Turn all accessories i


4. The engine should be at normal operating temperature.


5. Using a jumper wire, connect terminals TE1 and E1 of the C^ita Link
   Connector 1 (DLC1).

••Some aftermarket companies have a scanner which just si
into the DLC1

6. Turn the ignition switch ON, but do not start the engine. Re;
   diagnostic code by the counting the number of flashes of the malfu
   indicator lamp.

des

dthe

ction

Fig. 101 Count the number of flashes on the CHECK ENGINE

light

0.25

ON

OFF

0.25

(Seconds)

Fig. 102 A normal system operation will illuminate the light

every 1 /4 second

(Code No. 13) (Code No. 21)

0.5

ON

OFF"

IUU1

4.0 1.5 2.5 4.5

(Seconds)

Fig. 103 Diagnostic code example of codes 13 and 21—2TZ-FE

engine

Malfunction Detection (1st Time) Malfunction Detection (2nd Time)

(Temporarily Recorded) (Warning Light Lights Up)

>g Pattern

IG SW IG SW

ON OFF ON

! 1st Time ' i 2nd Time

IGSW

OFF

2 Trips

Fig. 104 A "2 trip" diagnostic code example—2TZ-FE engine