1996 TOYOTA TERCEL wiring

IN0CO-12
FI1066
Z11554
Seal Lock Adhesive
IN-4
- INTRODUCTIONREPAIR INSTRUCTIONS
4 Author
: Date
:
1996 TERCEL (RM440U)
REPAIR INSTRUCTIONS
GENERAL INFORMATION
BASIC REPAIR HINT
(a) Use fender, seat and floor covers to keep the vehicle
clean and prevent damage.
(b) During disassembly, keep parts in the appropriate order
to facilitate reassembly.
(c) Installation and removal of battery terminal:
(1) Before performing electrical work, disconnect the
negative (-) terminal cable from the battery.
(2) If it is necessary to disconnect the battery for in-
spection or repair, first disconnect the negative (-)
terminal cable.
(3) When disconnecting the terminal cable, to prevent
damage to battery terminal, loosen the cable nut
and raise the cable straight up without twisting or
prying it.
(4) Clean the battery terminals and cable ends with a
clean shop rag. Do not scrape them with a file or oth-
er abrasive objects.
(5) Install the cable ends to the battery terminals after
loosening the nut, and tighten the nut after installa-
tion. Do not use a hammer to tap the cable ends
onto the terminals.
(6) Be sure the cover for the positive (+) terminal is
properly in place.
(d) Check hose and wiring connectors to make sure that they
are connected securely and correctly.
(e) Non-reusable parts
(1) Always replace cotter pins, gaskets, O-rings, oil
seals, etc. with new ones.
(2) Non-reusable parts are indicated in the component
illustrations by the ºº symbol.
(f) Precoated parts
Precoated parts are bolts, nuts, etc. that are coated with
a seal lock adhesive at the factory.
(1) If a precoated part is retightened, loosened or
caused to move in any way, it must be recoated with
the specified adhesive.
(2) When reusing precoated parts, clean off the old
adhesive and dry with compressed air. Then apply
the specified seal lock adhesive to the bolt, nut or
threads.

IN-14
- INTRODUCTIONFOR ALL OF VEHICLES
14 Author
: Date
:
1996 TERCEL (RM440U)
2. FOR VEHICLES EQUIPPED WITH A CATALYTIC CONVERTER
CAUTION:
If large amount of unburned gasoline flows into the converter, it may overheat and create a fire haz-
ard. To prevent this, observe the following precautions and explain them to your customer.
(a) Use only unleaded gasoline.
(b) Avoid prolonged idling.
Avoid running the engine at idle speed for more than 20 minutes.
(c) Avoid spark jump test.
(1) Perform spark jump test only when absolutely necessary. Perform this test as rapidly as possible.
(2) While testing, never race the engine.
(d) Avoid prolonged engine compression measurement.
Engine compression tests must be done as rapidly as possible.
(e) Do not run engine when fuel tank is nearly empty.
This may cause the engine to misfire and create an extra load on the converter.
(f) Avoid coasting with ignition turned off.
(g) Do not dispose of used catalyst along with parts contaminated with gasoline or oil.
3. IF VEHICLE IS EQUIPPED WITH MOBILE COMMUNICATION SYSTEM
For vehicles with mobile communication systems such as two-way radios and cellular telephones, observe
the following precautions.
(1) Install the antenna as far as possible away from the ECU and sensors of the vehicle's electronic
system.
(2) Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the ve-
hicle's electronic systems. For details about ECU and sensors locations, refer to the section on
the applicable component.
(3) Avoid winding the antenna feeder together with other wiring as much as possible, and also avoid
running the antenna feeder parallel with other wire harnesses.
(4) Check that the antenna and feeder are correctly adjusted.
(5) Do not install powerful mobile communications system.
4. FOR USING OBD II SCAN TOOL OR TOYOTA HAND-HELD TESTER
CAUTION:
Observe the following items for safety reasons:

Before using the OBD II scan tool or TOYOTA hand-held tester, the OBD II scan tool's instruc-
tion book or TOYOTA hand-held tester's operator manual should be read thoroughly.

Be sure to route all cables securely when driving with the OBD II scan tool or TOYOTA hand-
held tester connected to the vehicle. (i.e. Keep cables away from feet, pedals, steering wheel
and shift lever.)

Two persons are required when test driving with the OBD II scan tool or TOYOTA hand-held
tester, one person to drive the vehicle and the other person to operate the OBD II scan tool or
TOYOTA hand-held tester.

V08423 Knock Sensor 1
GRECM
KNK
E1 12
E6
WIRING DIAGRAM
Wiring Diagram
This shows a wiring diagram of the circuit.
Use this diagram together with ELECTRICAL
WIRING DIAGRAM to thoroughly understand the
circuit.
Wire colors are indicated by an alphabetical code.
B = Black, L = Blue, R = Red, BR = Brown,
LG = Light Green, V = Violet, G = Green,
O = Orange, W = White, GR = Gray, P = Pink,
Y = Yellow, SB = Sky Blue
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe.
DTC P0325Knock Sensor 1 Circuit Malfunction
CIRCUIT DESCRIPTION
Knock sensor is fitted to the cylinder block to detect engine knocking. This sensor contains a piezoelectric element which
generates a voltage when it becomes deformed, which occurs when the cylinder block vibrates due to knocking. If engine
knocking occurs, ignition timing is retarded to suppress it.
DTC No. DTC Detection Condition Trouble Area
P0325No knock sensor 1 signal to ECM with engine speed,
1,200 rpm or more.
Open or short in knock sensor1 circuit

Knock sensor 1 (looseness)

ECM
If the ECM detects the above diagnosis conditions, it operates the fall safe function in which the corrective retard angle
value is set to the maximum value.

Diagnostic Trouble Code No. and Detection Item

Circuit Description
The major role and operation, etc. of the circuit
and its component parts are explained.

Indicates the diagnostic trouble code, diagnostic
trouble code set parameter and suspect area of
the problem.

IN-24
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 TERCEL (RM440U)
6. CIRCUIT INSPECTION
How to read and use each page is shown below.

PP3IT-01
- PREPARATIONMFI
PP-1 1
58 Author
: Date
:
1996 TERCEL (RM440U)
MFI
SST (Special Service Tools)
09268-41046Injection Measuring Tool Set
(09268-41091)NO.7 Union
(90405-09015)No.1 Union
09268-45012EFI Fuel Pressure Gauge
09631-22020Power Steering Hose Nut
14 x 17 mm Wrench SetFuel line flare nut
09816-30010Oil Pressure Switch SocketKnock sensor
09842-30070Wiring ºFº EFI Inspection
09843-18020Diagnosis Check Wire

DI4LH-02
P19551
ECM TerminalsE7 E6
1 2 3 4 5 6 7 8 9 10 11 12 13
23 24 25 26 1920 21 22 18 1415 16 171 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
- DIAGNOSTICSENGINE
DI-17
1996 TERCEL (RM440U)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
BATT (E6-2) - E1 (E7-24)W-R - BRAlways9 - 14
+B (E6-9) - E1 (E7-24)B-R - BRIG switch ON9 - 14
VC (E7-18) - E2 (E7-16)LG-R - BRIG switch ON4.5 - 5.5
VTA (E7 19) E2 (E7 16)YG BR
IG switch ON
Throttle valve fully closed0.3 - 1.0
VTA (E7-19) - E2 (E7-16)Y-G - BRIG switch ON
Throttle valve fully open3.2 - 4.9
PIM (E7 4) E2 (E7 16)PBRIG switch ON3.3 - 3.9PIM (E7-4) - E2 (E7-16)P - BRApply vacuum 26.7 kPa (200 mmHg, 7.9 in.Hg)2.5 - 3.1
THA (E7-15) - E2 (E7-16)L-B - BRIdling, Intake air temp. 20°C (68° F)0.5 - 3.4
THW (E7-3) - E2 (E7-16)G-B - BRIdling, Engine coolant temp. 80°C (176°F) 0.2 - 1.0
STA (E7-11) - E1 (E7-24)B-W - BRCranking6.0 or more
IG switch ON9 - 14
#10 (E7-12) - E01 (E7-13)G - BRIdlingPulse generation
(See page DI-52)
IG switch ON9 - 14
#20 (E7-11) - E01 (E7-13)Y - BRIdlingPulse generation
(See page DI-52)
IG switch ON9 - 14
#30 (E7-25) - E01 (E7-13)R - BRIdlingPulse generation
(See page DI-52)
IG switch ON9 - 14
#40 (E7-24) - E01 (E7-13)L - BRIdlingPulse generation
(See page DI-52)
IGT1 (E7-6) - E1 (E7-24)LG - BRIdlingPulse generation
(See page DI-84)
IGT2 (E7-5) - E1 (E7-24)L-Y - BRIdlingPulse generation
(See page DI-84)
IG switch ON, Disconnect igniter connector4.5 - 5.5
IGF (E7-7) - E1 (E7-24)LG-B - BRIdlingPulse generation
(See page DI-84)
G2(E7-20) - NE- (E7-9)R - WIdlingPulse generation
(See page DI-60)
NE(E7-21) - NE- (E7-9)B - WIdlingPulse generation
(See page DI-60)
FC (E6-4) - E1 (E7-24)G-B - BRIG switch ON9 - 14

DI-18
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)Symbols (Terminals No.)
Wiring ColorConditionSTD Voltage (V)
RSC (E7-1) - E1 (E7-24)L-R - BRIG switch ON
Disconnect ºE7º of ECM connector9 - 14
RSO (E7-14) - E1(E7-24)L - BRIG switch ON
Disconnect ºE7º of ECM connector9 - 14
OX1 (E7-10) - E1 (E7-24)B - BRMaintain engine speed at 2,500 rpm for 2 minutes. after
warming upPulse generation
OX2 (E7-23) - E1 (E7-24)W - BRMaintain engine speed at 2,500 rpm for 2 minutes. after
warming upPulse generation
HT1 (E6 6) E03 (E7 26)WL BRIdlingBelow 3.0HT1 (E6-6) - E03 (E7-26)W-L - BRIG switch ON9 - 14
HT2 (E6 5) E03 (E7 26)WR BRIdlingBelow 3.0HT2 (E6-5) - E03 (E7-26)W-R - BRIG switch ON9 - 14
KNK (E7-8) - E1 (E7-24)B - BRIdlingPulse generation
(See page DI-57)
NSW (E7 2) E1 (E7 24)(M/T)
IG switch ON
Other shift position in ºPº or ºNº position9 - 14
NSW (E7-2) - E1 (E7-24)(M/T)IG switch ON
Shift position in ºPº or ºNº position0 - 3.0
NSW (E7 2) E1 (E7 24)(A/T)
IG switch ON
Other shift position in ºPº or ºNº position9 - 14
NSW (E7-2) - E1 (E7-24)(A/T)IG switch ON
Shift position in ºPº or Nº position0 - 3.0
SPD (E6-13) - E1 (E7-24)Y - BRIG switch ON
Rotate driving wheel slowlyPulse generation
(See page DI-76)
TE1 (E6-8) - E1 (E7-24)G - BRIG switch ON9 - 14
W (E6 10) E1 (E7 24)GR L BRIdling9 - 14W (E6-10) - E1 (E7-24)GR-L - BRIG switch ONBelow 3.0
AC1 (E6 12) E1 (E7 24)LG B BRIdling, A/C switch ONBelow 2.0AC1 (E6-12) - E1 (E7-24)LG-B - BRIdling, A/C switch OFF9 - 14
ACT (E6 14) E1 (E7 24)LBRIdling, A/C switch ON9 - 14ACT (E6-14) - E1 (E7-24)L - BRIdling, A/C switch OFFBelow 2.0
ODSW (E6 3) E1 (E7 24)RW BRIG switch ON, O/D main switch pushed out9 - 14ODSW (E6-3) - E1 (E7-24)R-W - BRIG switch ON, O/D main switch pushed in0 - 3.0
ODT (E6 11) E1 (E7 24)RBRIG switch ON, O/D main switch pushed out9 - 14ODT (E6-11) - E1 (E7-24)R - BRIG switch ON, O/D main switch pushed in0 - 3.0

A15677
- DIAGNOSTICSENGINE
DI-21
1996 TERCEL (RM440U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
If DTC P0105, P0110, P0115, P0120 are output simultaneously, E2 (sensor ground) may be open.
1 Connect OBD II scan tool or TOYOTA hand-held tester, and read value of man-
ifold absolute pressure.
PREPARATION:
(a) Remove the fuse cover on the instrument panel.
(b) Connect the OBD II scan tool or TOYOTA hand-held tester to the DLC3.
(c) Turn the ignition switch ON and OBDII scan tool or TOYOTA hand-held tester main switch ON.
CHECK:
Read value of manifold absolute pressure on the OBD II scan tool or TOYOTA hand-held tester.
OK:
Same value as the atmospheric pressure
OK Check for intermittent problems (See page
DI-3).
NG

- DIAGNOSTICSENGINE
DI-23
1996 TERCEL (RM440U)
DTC P0106 Manifold Absolute Pressure/Barometric
Presure Circuit Range/Performance Problem
CIRCUIT DESCRIPTION
Refer to DTC P0105 on page DI-20.
DTC No.DTC Detection ConditionTrouble Area
P0106
Conditions (a) and (b) continue with engine speed
400 - 1,000 rpm:
(2 trip detection logic)
(a) Closed throttle position switch: ON
(b) Manifold absolute pressure sensor output > 3.0 V

Manifold absolute pressure sensor
WIRING DIAGRAM
Refer to DTC P0105 on page DI-20.
INSPECTION PROCEDURE
HINT:
If DTC P0105 and P0106 are output simultaneously, manifold absolute pressure sensor circuit may be open.
Perform troubleshooting of DTC P0105 first.
1 Are there any other codes (besides DTC P0106) being output?
YES Go to relevant DTC chart.
NO
2 Check manifold absolute pressure sensor (See page MF-48).
NG Replace manifold absolute pressure sensor.
OK
Check vacuum line for manifold absolute
pressure sensor for blockage.
DI1E4-05