2001 TOYOTA PRIUS warning light
[x] Cancel search: warning lightPage 1067 of 1943
AT0716AB0056H08231
Normal Code
ON
OFF0.25
0.25
Code 11 and 31
ON
OFF
0.5 2.54.0
1.5 0.5
DTC 11
DTC 31Repeat
F12396
TOYOTA Hand±held Tester
DLC3
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±503
2001 PRIUS (RM778U)
(c) Read the DTC.
Read the 2±digit DTC as indicated by the number of times
the SRS warning light blinks. As an example, the blinking
patterns, normal, 11 and 31 are shown in the illustration.
Normal code indication
The light will blink 2 times per second.
Malfunction code indication
The first blinking output indicates the first digit
of a 2±digit DTC. After a 1.5±second pause,
the second blinking output will indicate the
second digit.
If there are 2 or more codes, there will be a 2.5±second pause
between each code. After all the codes have been output, there
will be a 4.0±second pause and they will all be repeated.
HINT:
In the event of a number of trouble codes, indication will
start from the smallest numbered code.
If a DTC is not output or a DTC is output without terminal
connection, proceed to the Tc terminal circuit inspection
on page DI±636.
3. DTC CHECK (Using TOYOTA hand±held tester)
(a) Hook up the TOYOTA hand±held tester to the DLC3.
(b) Read the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
4. DTC CLEARANCE (Not using service wire)
When the ignition switch is turned off, the diagnostic trouble
code is cleared.
HINT:
DTC might not be cleared by turning the ignition switch OFF.
In this case, proceed to the next step.
5. DTC CLEARANCE (Using service wire)
(a) Connect the 2 service wires to terminals Tc and A/B of
DLC3.
(b) Turn the ignition switch to ON and wait for approx. 6 se-
conds.
Page 1068 of 1943
H10687
H15218
H15698
A/BTerminal
Tc
A/BOFF
Body
Ground
OFF
ON
OFF
Several
Seconds50 m sec.
50 m sec.
1 second
(±0.5 sec.)
Tc
Body
Ground
1 second
(±0.5 sec.)
1
23
45
F12396
TOYOTA Hand±held Tester
DLC3
DI±504
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
(c) Starting with the Tc terminal, ground alternately terminal
Tc and terminal A/B twice each in cycles of 1.0 second.
Make sure that the terminals are grounded. Ensure the
terminal Tc remain grounded.
HINT:
When alternately grounding terminals Tc and A/B, release
ground from one terminal and immediately ground the other ter-
minal within an interval of 0.2 seconds.
If DTCs are not cleared, repeat the above procedure until the
codes are cleared.
(d) Several seconds after doing the clearing procedure, the
SRS warning light will blink in a 50 ± m sec. cycle to indi-
cate the codes which have been cleared.
6. DTC CLEARANCE (Using TOYOTA hand±held tester)
(a) Hook up the TOYOTA hand±held tester to the DLC3.
(b) Clear the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the TOYOTA hand±held tester operation's
manual for further details.
Page 1072 of 1943
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 circuitSteering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
B0101/14
(DI±515)
Open in D squib circuitSteering 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 circuitFront passenger airbag assembly (squib)
Airbag sensor assembly
Wire harness
ON
B0106/54
(DI±531)Open in P squib circuitFront 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) circuitSide airbag assembly RH (squib)
Airbag sensor assembly
Wire harness
Blink
B0111/44
(DI±544)Open in side squib (RH) circuitSide 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) circuitSide airbag assembly LH (squib)
Airbag sensor assembly
Wire harness
Blink
B0116/48
(DI±557)Open in side squib (LH) circuitSide airbag assembly LH (squib)
Airbag sensor assembly
Wire harness
Blink
Page 1073 of 1943
± 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) circuitSeat belt pretensioner RH (squib)
Airbag sensor assembly
Wire harness
Blink
B0131/64
(DI±570)Open in P/T squib (RH) circuitSeat 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) circuitSeat belt pretensioner LH (squib)
Airbag sensor assembly
Wire harness
Blink
B0136/74
(DI±583)Open in P/T squib (LH) circuitSeat 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 malfunctionAirbag sensor assemblyON
B1135/24
(DI±594)Harf connection in airbag sensor
assembly connectorAirbag sensor assembly
Wire harnessBlink
B1140/32
(DI±597)Side airbag sensor assembly (RH)
malfunctionSide airbag sensor assembly (RH)
Airbag sensor assembly
Wire harness
Blink
B1141/33
(DI±605)Side airbag sensor assembly (LH)
malfunctionSide airbag sensor assembly (LH)
Airbag sensor assembly
Wire harness
Blink
B1156/B1157/
15
(DI±613)Front airbag sensor (RH) malfunctionFront 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) malfunctionFront airbag sensor (LH)
Airbag sensor assembly
Instrument panel wire harness
Engine room main wire harness
ON
NlSystem normal±OFFNormal
(DI±629)Voltage source dropBattery
Airbag sensor assemblyON
Page 1074 of 1943
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.
Page 1075 of 1943
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)
Page 1196 of 1943
H15524
B±W
W5
2BB±O
GR
W±B ACC Relay 10A SRS ACC
5A AM1
FL Block No. 2 FL Block No. 1 15A AM2
Battery 100A
DC/DCB±G W±RA
J11
J/C W±G
W±R P±L1
2H
8
2C2
2E
4
2E
8
2K
2B 536
A18ACC
120A
1 1
F13 1
F12
1
F11 1B9 2
1J B1
2G2
2C ACC
2
67AM1
AM2 IG2MAIN
35
A18IG2 Airbag Sensor
Assembly Instrument Panel J/B
Ignition Switch
ID 12
3
Instrument Panel J/B Engine Room J/B DI±634
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage±increase circuit (DC±DC converter) in the airbag sensor assembly in
case the source voltage drops.
When the battery voltage drops, the voltage±increase circuit (DC±DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is different from other circuits that is when the SRS
warning light remains lit up and the DTC is a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and the source voltage returns to
normal, the SRS warning light automatically goes off.
DTC No.Diagnosis
(Normal)Source voltage drop
WIRING DIAGRAM
DI6PY±07
Page 1198 of 1943
AB0119H01298H01299
Airbag Sensor Assembly
ON
IG1
ACC
(+) (±)
H01249
ON
DI±636
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
2 Check source voltage.
PREPARATION:
Connect negative (±) terminal cable to the battery.
CHECK:
(a) Turn ignition switch ON.
(b) Measure the voltage between body ground and each of
IG1 and IG2 on the sensor and operate electric system
(defogger, wiper, headlight, heater blower, etc.).
OK:
Voltage: 10 ± 14 V
NG Check harness between battery and airbag sen-
sor assembly, and check battery and charging
system.
OK
3 Does SRS warning light turn off?
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Connect the steering wheel pad connector.
(c) Connect the front passenger airbag assembly connector.
(d) Connect the side airbag assembly connectors.
(e) Connect the seat belt pretensioner connectors.
(f) Connect the airbag sensor assembly connectors.
(g) Connect the front airbag sensor connectors.
(h) Connect the side airbag sensor assembly connectors.
(i) Turn the ignition switch to ON.
CHECK:
Operate electric system (defogger, wiper, headlight, heater
blower, etc.) and check that SRS warning light goes off.
NO Check for DTCs. If a DTC is output, perform trou-
bleshooting for the DTC. If a normal code is out-
put, replace airbag sensor assembly.
YES
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.