wiring TOYOTA AVENSIS 1999 Supplement

1999 TOYOTA MOTOR CORPORATION
All rights reserved. This book may not be repro-
duced or copied, in whole or in part, without the
written permission of Toyota Motor Corporation.
First Printing: Jun. 15, 1999 01–990615–00
FOREWORD
This supplement has been prepared to provide information covering general se\
rvice repairs for the chassis
and body of the TOYOTA AVENSIS/CORONA which underwent changes in August, 1999.Applicable models: AT220, 221 series
ST220 series
CT220 series
CDT220 series
Pub. No.Manual NamePub. No.

A VENSIS/CORONA Chassis and Body Repair
ManualRM599E
2C Engine Repair Manual SupplementRM297E

4A–FE Engine Repair ManualRM296E
2C–T Engine Repair Manual SupplementRM494E

7A–FE Engine Repair ManualRM325E
2C–T, 2C–TE Engine Repair Manual SupplementRM612E

4A–FE Engine Repair Manual SupplementRM397E
1CD–FTV Engine Repair ManualRM697E

7A–FE Engine Repair Manual SupplementRM435E
A241L, A241E Automatic Transaxle Repair ManualRM177E

4A–FE, 7A–FE Engine Repair Manual SupplementRM611E
A245E Automatic Transaxle Repair ManualRM350E

3S–FE Engine Repair ManualRM395E
AVENSIS/CORONA Electrical Wiring DiagramEWD330Y

3S–FE Engine Repair Manual SupplementRM495E
AVENSIS/CORONA Electrical Wiring Diagram
SupplementEWD373F

3S–FE Engine Repair Manual SupplementRM609E
AVENSIS/CORONA New Car FeaturesNCF145E

1C, 2C, 2C–T Engine Repair ManualRM025E
AVENSIS/CORONA New Car Features SupplementNCF168E
All information in this manual is based on the latest product information at the time of\
publication. However,
specifications and procedures are subject to change without notice.
TOYOTA MOTOR CORPORATION
AZT 220 series
Manual Name
ZZT220, 221 series
For the service specifications and repair procedures of the above model othe\
r than those listed in this supple-
ment, refer to the following manuals.

FI1066
IN03Z–01
IN–4
– INTRODUCTIONREPAIR INSTRUCTIONS
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.
(3) When disconnecting the terminal cable, to prevent
damage to the 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 and oil
seals, etc. with new ones.
(2) Non–reusable parts are indicated in the component
illustrations by the ”
” symbol.
(f) Precoated parts
Precoated parts are bolts and 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.
(3) Precoated parts are indicated in the component il-
lustrations by the ”” symbol.
(g) When necessary, use a sealer on gaskets to prevent
leaks.

IN–16
– INTRODUCTIONFOR ALL OF VEHICLES
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 and prolonged braking.
(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.
(a) Install the antenna as far as possible away from the ECU and sensors of the vehicle’s electronic sys-
tem.
(b) Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the vehicle’s
electronic systems. For details about ECU and sensors locations, refer to the section on the applicable
component.
(c) Do not wind the antenna feeder together with the other wiring as much as possible, also avoid running
the antenna feeder parallel with other wire harnesses.
(d) Check that the antenna and feeder are correctly adjusted.
(e) Do not install powerful mobile communications system.
4. FOR USING HAND–HELD TESTER
CAUTION:
Observe the following items for safety reasons:
Before using the hand–held tester, the hand–held tester’s operator manual should be read thor-
oughly.
Be sure to route all cables securely when driving with the 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 hand–held tester, one person to drive the
vehicle and the other person to operate the hand–held tester.



B02407
WIRING DIAGRAM
DTC 13 Short in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each components,see OPERATION on page RS–2.
DTC 13 is recorded when a short is detected in the D squib circuit.
DTC No.DTC Detecting Condition
Trouble Area
Short circuit between D wire harness and D wire harness of squib
D squib malfunction
Spiral cable malfunction
Airbag sensor assembly malfunctionSteering wheel pad (D squib)
Spiral cable
Airbag sensor assembly
Wire harness
 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. 
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
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe. 
Spiral
Cable
G–R
G–Y 1
27
6D+
D–
A15
A15
D SquibAirbag Sensor
Assembly
13
– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN–27
6. CIRCUIT INSPECTION
How to read and use each page is shown below.

DI697–01
H01454
Curtain Shield Airbag
Squib (RH)Airbag Sensor Assembly
1Y–O16
C5
ICR+ 2
Y–V17
C5ICR– DI–8
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
CIRCUIT INSPECTION
DTC 81 Short in Curtain Shield Airbag Squib (RH)
Circuit (to Ground)
CIRCUIT DESCRIPTION
The curtain shield airbag squib (RH) circuit consists of the airbag sensor assembly and curtain shield airbag
(RH).
It causes the curtain shield airbag (RH) to activate when the curtain shield airbag assembly (RH) activation
conditions are satisfied.
DTC No.DTC Detecting ConditionTrouble Area
81

Short circuit in curtain shield airbag squib (RH) wire har-
ness (to ground)

Curtain shield airbag squib (RH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag (RH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM



 
H11659
Curtain
Shield
Airbag
Squib (RH)Airbag
Sensor
Assembly
ICR+
(+)
(–)
ICR–
Airbag Sensor
Assembly ON
DI–12
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DTC 82 Short in Curtain Shield Airbag Squib (RH)
Circuit (to B+)
CIRCUIT DESCRIPTION
The curtain shield airbag squib (RH) circuit consists of the airbag sensor assembly and curtain shield airbag
assembly (RH).
It causes the curtain shield airbag assembly (RH) to activate when the curtain shield airbag assembly (RH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 82 is recorded when a B+ short is detected in the curtain shield airbag squib (RH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
82

Short circuit in curtain shield airbag assembly (RH) wire
harness (to B+)

Curtain shield airbag squib (RH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (RH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI–8.
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI–285 of Pub. No. RM599E)
2 Check curtain shield airbag squib (RH) circuit.
CHECK:
(a) Turn ignition switch to ON.
(b) For the connector (on the airbag sensor assembly side)
between the curtain shield airbag assembly (RH) and the
airbag sensor assembly, measure the voltage between
ICR+, ICR– and body ground.
OK:
Voltage: 1 V or less
NG Repair or replace harness or connector be-
tween curtain shield airbag assembly (RH) and
airbag sensor assembly.
OK
DI698–01


H11662
Airbag
Sensor
Assembly
(–) (+) Curtain
Shield
Airbag
Squib (RH)
Airbag Sensor
Assembly
ICR+
ICR–
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–15
DTC 83 Short in Curtain Shield Airbag Squib (RH)
Circuit
CIRCUIT DESCRIPTION
The curtain shield airbag squib (RH) circuit consists of the airbag sensor assembly and curtain shield airbag
assembly (RH).
It causes the curtain shield airbag assembly (RH) to activate when the curtain shield airbag assembly (RH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 83 is recorded when a short is detected in the curtain shield airbag squib (RH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
83

Short circuit between ICR+ wire harness and ICR– wire
harness of squib

Curtain shield airbag squib (RH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (RH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI–8.
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI–285 of Pub. No. RM599E)
2 Check curtain shield airbag squib (RH) circuit.
PREPARATION:
Release airbag activation prevention mechanism of the con-
nector (on the airbag sensor assembly side) between the airbag
sensor assembly and curtain shield airbag assembly (RH).
(See page DI–1)
CHECK:
For the connector (on the airbag sensor side) between the cur-
tain shield airbag (RH) and airbag sensor assembly, measure
the resistance between ICR+ and ICR–.
OK:
Resistance: 1 MΩ or Higher
NG Repair or replace harness or connector be-
tween curtain shield airbag assembly (RH) and
airbag sensor assembly.
OK
DI699–01


H11662
Airbag
Sensor
Assembly
(–) (+) Curtain
Shield
Airbag
Squib (RH)
Airbag Sensor
Assembly
ICR+
ICR–
DI–18
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DTC 84 Open in Curtain Shield Airbag Squib (RH)
Circuit
CIRCUIT DESCRIPTION
The curtain shield airbag squib circuit (RH) consists of the airbag sensor assembly and curtain shield airbag
assembly (RH).
It causes the curtain shield airbag assembly (RH) to activate when the curtain shield airbag assembly (RH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 84 is recorded when an open is detected in the curtain shield airbag squib (RH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
84

Open circuit in ICR+ wire harness or ICR– wire harness of
squib

Curtain shield airbag squib (RH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (RH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI–8.
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI–285 of Pub. No. RM599E)
2 Check curtain shield airbag squib (RH) circuit.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the curtain shield airbag assembly (RH) and airbag sen-
sor assembly, measure the resistance between ICR+ and
ICR–.
OK:
Resistance: Below 1 Ω
NG Repair or replace harness or connector be-
tween curtain shield airbag assembly (RH) and
airbag sensor assembly.
OK
DI69A–01

H01454
Curtain Shield Airbag
Squib (LH)Airbag Sensor Assembly
1 2
Y–P8
C5
ICL+ Y–GR7
C5ICL–
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–21
DTC 85 Short in Curtain Shield Airbag Squib (LH)
Circuit (to Ground)
CIRCUIT DESCRIPTION
The curtain shield airbag squib (LH) circuit consists of the airbag sensor assembly and curtain shield airbag
assembly (LH).
It causes the curtain shield airbag assembly (LH) to activate when the curtain shield airbag assembly (LH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 85 is recorded when ground short is detected in the curtain shield airbag squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
85

Short circuit in curtain shield airbag squib (LH) wire har-
ness (to ground)

Curtain shield airbag squib (LH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
DI69B–01



H12070
Airbag
Sensor
Assembly Curtain
Shield
Airbag
Squib (LH)
ICL+
(–)(+) ONAirbag Sensor
Assembly
ICL–
V
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–25
DTC 86 Short in Curtain Shield Airbag Squib (LH)
Circuit (to B+)
CIRCUIT DESCRIPTION
The curtain shield airbag squib (LH) circuit consists of the airbag sensor assembly and curtain shield airbag
assembly (LH).
It causes the curtain shield airbag assembly (LH) to activate when the curtain shield airbag assembly (LH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 86 is recorded when the B+ short is detected in the curtain shield airbag squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
86

Short circuit in curtain shield airbag assembly (LH) wire
harness (to B+)

Curtain shield airbag squib (LH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI–21.
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI–285 of Pub. No. RM599E)
2 Check curtain shield airbag squib (LH) circuit.
CHECK:
(a) Turn ignition switch to ON.
(b) For the connector (on the curtain shield airbag assembly
side) between the curtain shield airbag assembly (LH)
and airbag sensor assembly, measure the voltage be-
tween ICL+, ICL– and body ground.
OK:
Voltage: 1 V or less
NG Repair or replace harness or connector be-
tween curtain shield airbag assembly (LH) and
airbag sensor assembly.
OK
DI69C–01