1995 TOYOTA SUPRA battery

Repair or replace harness or connector.
Proceed to next circuit inspection shown on matrix
chart (See page AT2±64). However, when diagnostic
trouble code 77 is displayed, check and replace
ECM.
Check harness and connector between battery and No.5 solenoid valve, No.5
solenoid valve and ECM (See page IN±30).
AT2±94± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

Check voltage between terminals R, NSW, 2, L of ECM connector and body
ground.
1. Connect the Check Harness A to the ECM
(See page EG±510).
2. Turn ignition switch ON.
Measure voltage between terminals R, NSW, 2, L of
the Check Harness A connector and body ground
when the shift lever is positioned to the following
ranges.
Proceed to next circuit inspection shown on
matrix chart (See page AT2±64).
*: The voltage will drop slightly due to lighting up of
the back up light.
Check harness and connector between battery and park/neutral position
switch, park/neutral position switch and ECM (See page IN±30).
Check park/neutral position switch.
Replace the park/neutral position switch.
Repair or replace harness and connector.
Check and replace ECM.
1. Jack up the vehicle.
2. Remove the park/neutral position switch (See
page AT2±17).
Check continuity between each terminal shown be-
low when the shift lever is positioned to each posi-
tion.
INSPECTION PROCEDURE
AT2±102± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

Check pattern select switch.
Check harness and connector between battery and pattern select switch,
pattern select switch and ECM (See page IN±30).
Replace pattern select switch.
Repair or replace harness or connector.
Check and replace ECM.
PatternResistance
MANU0  (continuity)

(open)NORM
Disconnect the pattern select switch connector.
Measure resistance between the terminals 3 and 4
of the pattern select switch connector when the se-
lect switch is set to MANU and NORM positions.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±107

PRECAUTION
Take care to observe the doing precautions when performing inspections or removal and replacement of
body electrical related parts.
HEADLIGHT SYSTEM
wHalogen bulbs have pressurized gas inside and require special handling. They can burst if scratched or
dropped. Hold a bulb only by its plastic or metal case.
Don't touch the glass part of a bulb with bare hands.
SRS (SUPPLEMENTAL RESTRAINT SYSTEM)
wWork must be started after 90 seconds from the time the ignition switch is turned to the ºLOCKº position
and the negative (±) terminal cable is disconnected from the battery.
wWhen disconnecting any of the connectors in the SRS, be sure to lock the ignition switch and disconnect
the negative (±) terminal cable from the battery first. Since the connectors are twin lock type connectors,
disconnect the connectors only after releasing the first stage lock.
wWhen connecting SRS connectors, be sure to lock them securely. (If the connectors are not locked
securely, the system may not operate when needed.)
wAlways store the steering wheel pad with the pad surface facing upward. (Storing the pad with its metallic
surface up may lead to a serious accident if the SRS inflates for some reason.)
wWhen installing the spiral cable, be sure the vehicle is in the straight ahead condition and confirm that the
spiral cable is in the neutral position when it is installed.
wINFORMATION LABELS (NOTICE) are attached to the periphery of the SRS components. Follow the
NOTICE.
AUDIO SYSTEM
wIf the negative (±) terminal cable is disconnected from the battery, the preset AM, FM 1 and FM 2 stations
stored in memory are erased, so be sure to note the stations and reset them after the battery terminal is
reconnected.
wIf the negative (±) terminal cable is disconnected from the battery, the ºANTI±THEFT SYSTEMº will operate
when the cable is reconnected, but the radio, tape player and CD player will not operate. Be sure to input
the correct ID number so that the radio, tape player and CD player can be operated again.
MOBILE COMMUNICATION SYSTEM
wIf the vehicle is equipped with a mobile communication system, refer to precautions in the IN section. BE±2
± BODY ELECTRICAL SYSTEMPRECAUTION

PREPARATION
SST (SPECIAL SERVICE TOOLS)
09843±18020Diagnosis Check Wire
09808±14010Fuel Sender Gauge Tool Assy
09950±50010Puller C Set
RECOMMENDED TOOLS
09082±00050TOYOTA Electrical Tester Set


EQUIPMENT
 
 Voltmeter
 
 
 Ammeter 
 Ohmmeter 
 Test lead 
 Thermometer Engine oil level warning switch, Seat heater
 Syphon Brake fluid level warning switch
 Oil bath Engine oil level warning switch
 Bulb (3.4 W) Fuel sender gauge, Seat belt warning relay Bulb (21 W) Turn signal flasher relay Dry cell battery Fuel sender gauge 
 Heat light
 
 Seat heater
 Torque wrench 
 Masking tape Rear window defogger wire
 Tin foil Rear window defogger wire
SSM (SPECIAL SERVICE MATERIAL)
 

DuPont Paste No. 4817 or
equivalent
 

Rear window defogger
 
 
equivalent 
 
± BODY ELECTRICAL SYSTEMPREPARATIONBE±3

KEY UNLOCK WARNING INSPECTION
1. INSPECT INTEGRATION RELAY OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1,
the negative (±) lead to terminals 5 and 10.
(b) Check that the buzzer sounds when the negative (±) lead
from the battery is connected to terminal 6.
If operation is not as specified, replace the relay.
2. INSPECT RELAY CIRCUIT
See page BE±18
± BODY ELECTRICAL SYSTEMIGNITION SWITCHBE±9

INTEGRATION RELAY INSPECTION
INSPECT RELAY CIRCUIT
Light Auto Turn Off System
Remove the relay from junction block and inspect the con-
nectors on the wire harness and junction block side, as
shown in the chart.
 
 
Tester connection to
terminal number 
 Condition 
 Specified condition
 A6±Ground  Driver's door courtesy switch OFF No continuity
 A6±Ground Driver's door courtesy switch ON Continuity
 A10±Ground Constant Continuity
 B1±Ground Light control switch position OFF or TAIL No continuity
 B1±Ground Light control switch position HEAD Continuity
 B4±Ground Light control switch position OFF No continuity B4±Ground Light control switch position TAIL or HEAD Continuity A1±Ground Constant Battery positive voltage 
 A7±Ground
 
 Ignition switch position LOCK or ACC
 
 No voltage
 A7±Ground Ignition switch position ON Battery positive voltage
 B2±Ground Constant Battery positive voltage
 B3±Ground Constant Battery positive voltage
If the circuit is as specified, try replacing the relay with a new
one.
If the circuit is not as specified, inspect the circuits connected
to other parts.
DOOR COURTESY SWITCH INSPECTION
See page BE±28
± BODY ELECTRICAL SYSTEMHEADLIGHT AND TAILLIGHT SYSTEMBE±17

DAYTIME RUNNING LIGHT MAIN RELAY
INSPECTION
INSPECT RELAY CIRCUIT
Disconnect the connector from relay and inspect the connec-
tor on wire harness side, as shown.
 
 Tester connection to
terminal number 
 Condition
 
 Specified condition
 
 5±Ground
 
 Headlight dimmer switch position Low
beam or high beam 
  No continuity
 5±Ground  Headlight dimmer switch position Flash Continuity 8±Ground Parking brake switch position OFF No continuity 8±Ground Parking brake switch position ON Continuity 
16±Ground
 
Headlight dimmer switch position Low beam
 
No continuity
 16±Ground Headlight dimmer switch position Flash or
High beam Continuity
 
 13±Ground
 
 Constant
 
 Continuity
 18±Ground Constant Continuity
 2±Ground Ignition switch position LOCK or ACC No voltage
 2±Ground Ignition switch position ON Battery positive voltage
 11±Ground Engine Stop No voltage
 11±Ground Engine Running Battery positive voltage
 15±Ground  
15±Ground
17 GroundConstantBattery positive voltage 17±Ground Constant Battery ositive voltage
If the circuit is as specified, trying replacing the relay with a
new one. If the circuit is not as specified, inspect the circuit
connected to other parts.
PARKING BRAKE SWITCH INSPECTION
See page BE±52 BE±18
± BODY ELECTRICAL SYSTEMHEADLIGHT AND TAILLIGHT SYSTEM