TOYOTA PREVIA 91-97 REPAIR MANUAL

ENGINE ELECTRICAL 2-3

SPARK TEST

1 CHECK CONNECTION OF IGNITION COIL,

IGNITER AND DISTRIBUTOR CONNECTOR [fifl

t OK

CORD

» OK

CHECKAND IGNITER POWER SUPPLY TO IGNITION COIL

FCHECK RESISTANCE OF IGNITION COIL

Resistance'Primary 0 36 - 0 55 (Cold) (Hot) Q 0 45 - 0 65 O 8t>

^ C°"3ndW

J^=^~

GENERATOR [PICKUP COIL)
G1 and G 125 - 200 Q 160 - 235 Q BA
G2N E and G 1 55 - 250 Q 1 90 - 290 and G - 1 2B - 200 fl 1 60 - 235 if O
i, OK
CHECK AIR GAP OF DISTRIBUTOR
| Air gap- 0.2 - 0.5 mm (0008 - 0 020 in.) J BA
, OK

. Jui,n,,simwv
D

D~!

TRY ANOTHER IGNITER

9091 2G04

Fig. 3 No start test chart— 1994-95 2TZ-FE engine Fig.

SPARK TEST

| NO

IGNITER AND DISTRIBUTOR CONNECTOR

J OK

?ORDMaximum resistance: 25 kn per cord

CHECKAND GNITER POWER SUPPLY TO IGNITION COIL

2.1. Turn ignition switch Check that Ihere is battery ON. positive voltage at

Resistance: ColdPrimary 0.35 - Q.55O Hoi 0.45 • 0.650

Secondary 9.0-15.4 kO 11.4-18.1hO

OK

GENERATORResistance: Cold (PICKUP COIL) Hot

__ •G©andGQ T • • — 125-200O — 160-235n -

POSITION SENSORResistance: Cold Hot

NE©snd NEQ 1,630 - 2,7400 2.065 - 3,2250

| OK

CHECK AIR GAP OF DISTRIBUTOR

Air gap: 0.2 - 0.5 mm {0.008 - 0.020 In.)

i OK

SAO

BAD

BAD

BAD

BAD"

BADf

Connect securely.

Replace the cora(s].

Check wiring between ignition switch to ignition

Replace the ignition coil.

Replace the crankshaft position sensor.

t OK L_ J ^ " C

TRY ANOTHER IGNITER

90912GQ7

6 No start test chart— 1997 engines

I SPARK TEST

J NO

IGNITERCHECK CONNECTION AND DISTRIBUTOR OF IGNITION CONNECTOR COIL, I I nan'l Connect

i OK

CHECK RESISTANCE OF H

| CORD| Maximum resistance 25

GH-TENSION Replace

Mp.,t.,d BA°

i OK

CHECKAND IGNITER POWER SUPPLY , TO IGNITION COIL Check w coil and

1 Turn ignition switch ON. j

ignmon coil positive ( + l.rmin.l.

i OK

CHECK RESISTANCE OF 1C

ResistancePrrmary Cold 0.36-0

Secondary 9-0- 15

NiTION COIL Replace

(^55) 4kt! U 045-0651! I1.4-I81k£! BAD
J OK
! CHECKGENERATOR RESISTANCE (PICKUP OF COIL) SIGNAL J 1 Replace
' ResistanceG© and Cold G ''-) lZ5-200ii Hoi 160- 235 I il ; BAD"!
i OK
CHECKPOSITION RESISTANCE SENSOR _____ OF CRANKSHAFT Replace
Resistance: Cold Hot BAD
NE ^ and NE Q 1630 - 2740 U 2065 - 3225 i)
i OK
CHECKAii gap' AIR GAP OF 02-05 mm DISTRIBUTOR 10 008 - O.D20 (^1) in.] [ g^\ ^Replace nr
TRY ANOTHER IGNITER J
.=ur.ly.
k"°'a'"'
gnitpr
he crankshaft position sensor
he distributor housing assembly
-.and then try another ECM
90912G05
Fig. 4 No start test chart— 1994-95 2TZ-FZE engine
Fig.
SPARK TEST
MO
CHECKIGNITER CONNECTION AND DISTRIBUTOR OF IGNITION CONNECTOR COIL,
i OK
CHECK RESISTANCE OF HIGH-TENSION
COflDMaximum resistance: 25 kO per cord
OK
CHECKAND IGNITER POWER SUPPLY TO IGNITION COIL
2 Check (hat there is bartery positive voltage at
I ( °K.
Primary 0.36Secondary g.rj-15.4kn - O.S5O 0.45 11.4- - 18.1 0.65O kO
\K
CHECKGENERATOR RESISTANCE (PICKUP OF COIL) SIGNAL
ReslsGSand anca: G© Cold 135 - 220 Hot 11 175 - 255 il
\K
CHECKPOSITION SENSOR RESISTANCE OF CRANKSHAFT
Resistance:NE0andNE0 Cold 1,630 -2,7400 Hot 2,065-3,2350
CHECKAir gap: AIR 0.2 - 0.5 mm GAP OF DISTRIBUTOR (0.008 - 0.030 In.)
CHECK IGT SIGNAL FROM ECM
| OK
TRY ANOTHER IGNITER
BAD
BAD'
BAD
BAD
BAD
""BAD"'
Tar
BA~D~""
Connect securely
Replace the cord(s).
SwB8£"t"" 1 ' "'
Replace , e crankshaft position sensor
Replace m^ismbuwrho^ng assembly
Checkand igniter, wmng and between then try ECM, another distributor ECM.
9091 2G06
5 No start test chart— 1996 engines

3. 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.
   •Crank the engine for no more than 2 seconds at a time to prevent
   flooding the engine with gasoline.


4. If good spark does not occur (should be bright blue), follow the cor-
   rect diagnostic flow chart (engine and year) and necessary service proce-
   dures. If good spark does occur, the ignition system is probably not at fault.

SIGNAL GENERATOR AIR GAP INSPECTION

I See Figures 7 and 8

—The air gap in the distributor should be check periodically. Dis-

tributor air gap may only be checked and can only be adjusted by

component replacement.

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


2. Remove the distributor cap from the housing without disconnecting
   the ignition wires.


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.

Fig. 7 Measure the air gap in this position with a non-ferrous

feeler gauge—2TZ-FE engines