TOYOTA AVENSIS 1999 Supplement

DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM DI–1. . .
PRE–CHECK DI–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSTIC TROUBLE CODE CHART DI–4. . . . . .
PARTS LOCATION DI–5. . . . . . . . . . . . . . . . . . . . . . . . .
TERMINALS OF ECU DI–6. . . . . . . . . . . . . . . . . . . . . .
CIRCUIT INSPECTION DI–8. . . . . . . . . . . . . . . . . . . . .
REFER TO AVENSIS/CORONA REPAIR MANUAL FOR
CHASSIS AND BODY (Pub. No. RM599E)
NOTE: The above pages contain only the points which differ
from the above listed manual.

DI693–01
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–1
SUPPLEMENTAL RESTRAINT SYSTEM
PRE–CHECK
RELEASE METHOD OF AIRBAG ACTIVATION PREVENTION MECHANISM
An airbag activation prevention mechanism is built into the connector for the squib circuit of the SRS.
When release of the airbag activation prevention mechanism is directed in the troubleshooting procedure,
as shown in the illustration on the following pages, insert paper which has the same thickness as the male
terminal, between the terminal and short spring.
CAUTION:
Never release the airbag activation prevention mechanism on the steering wheel pad connector.
NOTICE:

Do not release the airbag activation prevention mechanism unless specifically directed by the
troubleshooting procedure.

If the inserted paper is too thick the terminal and short spring may be damaged, so always use
paper with the same thickness as the male terminal.

H11822
Airbag Sensor
AssemblySide Airbag Assembly (RH)
(Squib)
Pretensioner (RH)
(Squib)
Side and Curtain Shied
Airbag Sensor (RH)1
2
3
4
5
6
7
89
10
11
12
1314
15Front Airbag Sensor
(RH)
Front Passenger Airbag
Assembly (Squib)
Spiral Cable
Steering Wheel
Pad (Squib)
No.1 J/B
Pretensioner (LH)
(Squib) Front Airbag Sensor
(LH)
Side Airbag Assembly (LH)
(Squib)
16
19
18
17
2021Curtain Shied Airbag
Assembly (RH) (Squib)
Curtain Shied Airbag
Assembly (LH) (Squib)
Side and Curtain Shied
Airbag Sensor (LH) DI–2
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM


 


  


H01358
Airbag Sensor Assembly Connector
Short SpringShort SpringShort Spring
Before ReleaseAfter Release
Connector
Connector
Short SpringShort Spring
Before Release
Paper
After Release
Paper
5821
Connector
Paper
12
3
1019
Short Spring
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–3

DI694–01
DI–4
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below (Proceed to the page given for that circuit.).
DTC No.
(See Page)Detection ItemTrouble AreaSRS
Warning Light
81
(DI–8)Short in curtain shield airbag (RH) cir-
cuit (to ground)
Curtain shield airbag (RH) (squib)

Airbag sensor assembly

Wire harness
Blink
82
(DI–12)Short in curtain shield airbag (RH) cir-
cuit circuit (to B+)
Curtain shield airbag (RH) (squib)

Airbag sensor assembly

Wire harness
Blink
83
(DI–15)Short in curtain shield airbag (RH) squib
circuit
Curtain shield airbag (RH) (squib)

Airbag sensor assembly

Wire harness
Blink
84
(DI–18)Open in curtain shield airbag (RH) squib
circuit
Curtain shield airbag (RH) (squib)

Airbag sensor assembly

Wire harness
Blink
85
(DI–21)Short in curtain shield airbag (LH) circuit
(to ground)
Curtain shield airbag (LH) (squib)

Airbag sensor assembly

Wire harness
Blink
86
(DI–25)Short in curtain shield airbag (LH) circuit
circuit (to B+)
Curtain shield airbag (LH) (squib)

Airbag sensor assembly

Wire harness
Blink
87
(DI–28)Short in curtain shield airbag (LH) squib
circuit
Curtain shield airbag (LH) (squib)

Airbag sensor assembly

Wire harness
Blink
88
(DI–31)Open in curtain shield airbag (LH) squib
circuit
Curtain shield airbag (LH) (squib)

Airbag sensor assembly

Wire harness
Blink
HINT:

When the SRS warning light remains lit up and the DTC is the normal code, this means a voltage source
drops.
This malfunction is not stored in memory by the airbag sensor assembly and if the power source volt-
age returns to normal, the SRS warning light will automatically go out.

When 2 or more codes are indicated, the codes will be displayed in numeral order starting from the
lowest numbered code.

If a code not listed on the chart is displayed, the airbag sensor assembly is faulty.

DI695–01
H11591
Combination Meter
(Warning Light)Steering Wheel Pad
(with Airbag)
Airbag Sensor Assembly Front Passenger
Airbag Assembly
Side Airbag Assembly
(LH)
Seat Belt
Pretensioner (LH)Side Airbag Assembly (RH)
Seat Belt
Pretensioner (RH)
Front Airbag
Sensor (LH)
Front Airbag Sensor (RH)
Side and Curtain Shield
Airbag Sensor (RH) Side and Curtain Shield
Airbag Sensor (LH)Curtain Shield Airbag
Assembly (LH)Curtain Shield Airbag Assembly (RH)
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–5
PARTS LOCATION

DI696–01
H01357
C6C5C4
A B
1 2 3 4 5 6A BA B
7 8 9 10 11 121 2 3 4 5 6
7 8 9 10 11 12 1 2 3 4 5 6
7 8 9 10 11 12
23 24 25 26 27 2813 14 15 16 17
18 19 20 21 22 DI–6
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
TERMINALS OF ECU
No.SymbolTerminal Name
A–Electrical Connector Check Mechanism
B–Electrical Connector Check Mechanism
C4 – 1SFL–Squib (Side, LH)
C4 – 2SFL+Squib (Side, LH)
C4 – 5PL+Squib (Seat Belt Pretensioner, LH)
C4 – 6PL–Squib (Seat Belt Pretensioner, LH)
C4 – 7ESLSide Airbag Sensor (LH)
C4 – 9FSLSide Airbag Sensor (LH)
C4 – 10SSL+Side Airbag Sensor (LH)
C4 – 12VUPLSide Airbag Sensor (LH)
C5 – 3LASRS Warning Light
C5 – 5IG2Power Source (IGN Fuse)
C5 – 6ACCPower Source (CIG Fuse)
C5 – 7ICL+Squib (Curtain Shield Airbag, LH)
C5 – 8ICL–Squib (Curtain Shield Airbag, LH)
C5 – 9SR+Front Airbag Sensor (RH)
C5 – 10P+Squib (Passenger)
C5 – 11P–Squib (Passenger)
C5 – 12SILDiagnosis
C5 – 13D–Squib (Driver)
C5 – 14D+Squib (Driver)
C5 – 15SL+Front Airbag Sensor (LH)
C5 – 16ICR–Squib (Curtain Shield Airbag, RH)
C5 – 17ICR+Squib (Curtain Shield Airbag, RH)
C5 – 19TcDiagnosis

– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–7
No.SymbolTerminal Name
C5 – 20SR–Front Airbag Sensor (RH)
C5 – 26SL–Front Airbag Sensor (LH)
C5 – 27E1Ground
C5 – 28E2Ground
C6 – 1PR–Squib (Seat Belt Pretensioner, RH)
C6 – 2PR+Squib (Seat Belt Pretensioner, RH)
C6 – 5SFR+Squib (Side, RH)
C6 – 6SFR–Squib (Side, RH)
C6 – 7VUPRSide Airbag Sensor (RH)
C6 – 9SSR+Side Airbag Sensor (RH)
C6 – 10FSRSide Airbag Sensor (RH)
C6 – 12ESRSide Airbag Sensor (RH)

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