O2 sensor TOYOTA PRIUS 2001 Service Repair Manual

DI6OY±07
H15218
H10658
DLC3
CG Tc
DI±502
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
PRE±CHECK
1. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch to the ON position and check that
the SRS warning light lights up.
(b) Check that the SRS warning light goes out after approx.
6 seconds.
HINT:

When the ignition switch is at ON and the SRS warning
light remains on or flashes, the airbag sensor assembly
has detected a malfunction code.

If, after approx. 6 seconds have elapsed, the SRS warn-
ing light sometimes lights up or the SRS warning light
lights up even when the ignition switch is OFF, a short in
the SRS warning light circuit can be considered likely.
Proceed to ºSRS warning light circuit malfunctionº on
page DI±632.
2. DTC CHECK (Using diagnosis check wire)
(a) Present troubles codes:
Output the DTC.
(1) Turn the ignition switch to the ON position and wait
for approx. 20 seconds.
(2) Using SST, connect terminals Tc and CG of the
DLC3.
SST 09843±18020
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
(b) Past troubles codes:
Output the DTC.
(1) Using service wire, connect terminals Tc and CG of
the DLC3.
SST 09843±18020
(2) Turn the ignition switch to the ON position and wait
for approx. 20 seconds.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.

H15711
Airbag
Sensor
Assembly2
37
10
121
45
6
8
16
9
14
15
Side Airbag
Assembly (RH) (Squib)
Seat Belt
Pretensioner (RH) Side Airbag Sensor
Assembly (RH)
Front Airbag Sensor (RH)
Front Passenger Airbag
Assembly (Squib)
Spiral Cable
Steering Wheel
Pad (Squib)
Front Airbag Sensor (LH)
Side Airbag Sensor
Assembly (LH) Seat Belt
Pretensioner (LH)
Side Airbag
Assembly (LH) (Squib) 13
11
DI±506
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)

H01356H01233AB0130AB0045AB0046H02248
H02249H11587
Airbag Sensor Assembly Connector
Short SpringShort SpringShort Spring
Before ReleaseAfter Release
Connector
Connector
Short SpringShort Spring
Before Release
Paper
After Release
Paper
4
Paper
213
814
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±507
2001 PRIUS (RM778U)

DI6OZ±06
DI±508
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
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
B0100/13
(DI±510)

Short in D squib circuit
Steering wheel pad (squib)

Spiral cable

Airbag sensor assembly

Wire harness
ON
B0101/14
(DI±515)

Open in D squib circuit
Steering wheel pad (squib)

Spiral cable

Airbag sensor assembly

Wire harness
ON
B0102/11
(DI±519)

Short in D squib circuit (to ground)
Steering wheel pad (squib)

Spiral cable

Airbag sensor assembly

Wire harness
ON
B0103/12
(DI±523)

Short in D squib circuit (to B+)
Steering wheel pad (squib)

Spiral cable

Airbag sensor assembly

Wire harness
ON
B0105/53
(DI±527)
Short in P squib circuit
Front passenger airbag assembly (squib)

Airbag sensor assembly

Wire harness
ON
B0106/54
(DI±531)
Open in P squib circuit
Front passenger airbag assembly (squib)

Airbag sensor assembly

Wire harness
ON
B0107/51
(DI±534)
Short in P squib circuit (to ground)
Front passenger airbag assembly (squib)

Airbag sensor assembly

Wire harness
ON
B0108/52
(DI±537)
Short in P squib circuit (to B+)
Front passenger airbag assembly (squib)

Airbag sensor assembly

Wire harness
ON
B0110/43
(DI±540)
Short in side squib (RH) circuit
Side airbag assembly RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0111/44
(DI±544)
Open in side squib (RH) circuit
Side airbag assembly RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0112/41
(DI±550)
Short in side squib (RH) circuit
(to ground)
Side airbag assembly RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0113/42
(DI±550)
Short in side squib (RH) circuit
(to B+)
Side airbag assembly RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0115/47
(DI±553)
Short in side squib (LH) circuit
Side airbag assembly LH (squib)

Airbag sensor assembly

Wire harness
Blink
B0116/48
(DI±557)
Open in side squib (LH) circuit
Side airbag assembly LH (squib)

Airbag sensor assembly

Wire harness
Blink

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±509
2001 PRIUS (RM778U)DTC No.
(See Page)
Detection ItemTrouble AreaSRS
Warning Light
B0117/45
(DI±560)
Short in side squib (LH) circuit
(to ground)
Side airbag assembly LH (squib)

Airbag sensor assembly

Wire harness
Blink
B0118/46
(DI±563)
Short in side squib (LH) circuit
(to B+)
Side airbag assembly LH (squib)

Airbag sensor assembly

Wire harness
Blink
B0130/63
(DI±566)
Short in P/T squib (RH) circuit
Seat belt pretensioner RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0131/64
(DI±570)
Open in P/T squib (RH) circuit
Seat belt pretensioner RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0132/61
(DI±573)
Short in P/T squib (RH) circuit
(to ground)
Seat belt pretensioner RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0133/62
(DI±576)
Short in P/T squib (RH) circuit
(to B+)
Seat belt pretensioner RH (squib)

Airbag sensor assembly

Wire harness
Blink
B0135/73
(DI±579)
Short in P/T squib (LH) circuit
Seat belt pretensioner LH (squib)

Airbag sensor assembly

Wire harness
Blink
B0136/74
(DI±583)
Open in P/T squib (LH) circuit
Seat belt pretensioner LH (squib)

Airbag sensor assembly

Wire harness
Blink
B0137/71
(DI±586)
Short in P/T squib (LH) circuit
(to ground)
Seat belt pretensioner LH (squib)

Airbag sensor assembly

Wire harness
Blink
B0138/72
(DI±589)
Short in P/T squib (LH) circuit
(to B+)
Seat belt pretensioner LH (squib)

Airbag sensor assembly

Wire harness
Blink
B1100/31
(DI±592)
Airbag sensor assembly malfunction
Airbag sensor assemblyON
B1135/24
(DI±594)
Harf connection in airbag sensor
assembly connector
Airbag sensor assembly

Wire harnessBlink
B1140/32
(DI±597)
Side airbag sensor assembly (RH)
malfunction
Side airbag sensor assembly (RH)

Airbag sensor assembly

Wire harness
Blink
B1141/33
(DI±605)
Side airbag sensor assembly (LH)
malfunction
Side airbag sensor assembly (LH)

Airbag sensor assembly

Wire harness
Blink
B1156/B1157/
15
(DI±613)
Front airbag sensor (RH) malfunction
Front airbag sensor (RH)

Airbag sensor assembly

Instrument panel wire harness

Engine room No. 2 wire harness
ON
B1158/B1159/
16
(DI±621)
Front airbag sensor (LH) malfunction
Front airbag sensor (LH)

Airbag sensor assembly

Instrument panel wire harness

Engine room main wire harness
ON
Nl
System normal±OFFNormal
(DI±629)
Voltage source drop
Battery

Airbag sensor assemblyON

DI±510
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
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.

DI6P1±07
H01357
A18
A17A19
287 8 9 10 16 17
18A B12 3 4 5 6
11 12 15 14 13
AABB
19 20 21 22 23 24 25 26 27 1 2 3 4 5 6
7 8 9 10 11 121 2 3 4 5 6
7 8 9 10 11 12 DI±512
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
TERMINALS OF ECU
No.SymbolTerminal Name
A±Electrical Connector Check Mechanism
B±Electrical Connector Check Mechanism
A18 ± 3LASRS Warning Light
A18 ± 5IG2Power Source
A18 ± 6ACCPower Source
A18 ± 9+SRFront Airbag Sensor (RH)
A18 ± 10P+Squib (Passenger)
A18 ± 11P±Squib (Passenger)
A18 ± 12SILDiagnosis
A18 ± 13D±Squib (Driver)
A18 ± 14D+Squib (Driver)
A18 ± 15+SLFront Airbag Sensor (LH)
A18 ± 19TcDiagnosis
A18 ± 20±SRFront Airbag Sensor (RH)
A18 ± 23GSW2ECM
A18 ± 26±SLFront Airbag Sensor (LH)
A18 ± 27E1Ground
A18 ± 28E2Ground
A17 ± 1PL±Squib (Seat Belt Pretensioner, LH)
A17 ± 2PL+Squib (Seat Belt Pretensioner, LH)
A17 ± 5SFL±Squib (Side, LH)
A17 ± 6SFL+Squib (Side, LH)
A17 ± 7VUPLSide Airbag Sensor (LH)
A17 ± 9ESLSide Airbag Sensor (LH)
A17 ± 10SSL+Side Airbag Sensor (LH)

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±513
2001 PRIUS (RM778U)No.
SymbolTerminal Name
A17 ± 11LBE+Body ECU
A17 ± 12SSL±Side Airbag Sensor (LH)
A19 ± 1SFR+Squib (Side, RH)
A19 ± 2SFR±Squib (Side, RH)
A19 ± 5PR+Squib (Pretensioner, RH)
A19 ± 6PR±Squib (Pretensioner, RH)
A19 ± 7SSR±Side Airbag Sensor (RH)
A19 ± 9SSR+Side Airbag Sensor (RH)
A19 ± 10ESRSide Airbag Sensor (RH)
A19 ± 12VUPRSide Airbag Sensor (RH)

DI6P3±06
H01451
Y±B
D+ A1814Airbag Sensor Assembly
13
A18
D± Y 1
2
Spiral
Cable D Squib
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±515
2001 PRIUS (RM778U)
CIRCUIT INSPECTION
DTC B0100/13 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 component, see OPERATION on page RS±2.
DTC B0100/13 is recorded when a short is detected in the D squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0100/13

Short circuit between D+ wire harness and D± wire har-
ness of squib

D squib malfunction

Spiral cable malfunction

Airbag sensor assembly malfunction
Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Wire harness
WIRING DIAGRAM

H01001H02142H02193
D SquibSpiral
Cable
Airbag
Sensor
Assembly
D+
(±)(+) D±
DI±516
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±629).
2 Check D squib circuit.
PREPARATION:
Release the airbag activation prevention mechanism of the
connector (on the airbag sensor assembly side) between the
airbag sensor assembly and the spiral cable (See page
DI±497).
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and the steering wheel pad, measure the resistance be-
tween D+ and D±.
OK:
Resistance: 1 MW or Higher
NG Go to step 5.
OK