Page 1584 of 3115
AB0119H21169H21525
(-)
(+) ONAirbag Sensor Assembly
IG2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-803
996 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC B1100/31 Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of the airbag sensor, safing sensor, drive circuit, diagnosis circuit and
ignition control, etc.
It receives signals from the airbag sensor, judges whether or not the SRS must be activated, and detects
diagnosis system malfunction.
DTC B1100/31 is recorded when occurrence of a malfunction in the airbag sensor assembly is detected.
DTC No.DTC Detecting ConditionTrouble Area
B1100/31Airbag sensor assembly malfunctionAirbag sensor assembly
INSPECTION PROCEDURE
HINT:
When a malfunction code other than code B1100/31 is displayed at the same time, first repair the malfunction
indicated by the malfunction code other than code B1100/31.
1 Prepare for inspection (See step 1 on page DI-923).
2 Check airbag sensor assembly.
PREPARATION:
Connect the negative (-) terminal cable to the battery, and wait
at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the body ground and IG2
of the dash wire connector on the airbag sensor assembly
side.
OK:
Voltage: 10 - 14 V
NG Check that an abnormality occurs on the battery
and charging system.
OK
DI6PR-15
Page 1704 of 3115
H21247
Airbag Sensor
Assembly
C26IG2 5
B-R
3F3 IGN
3E4Cowl Side J/B RH
AB-R
AJ4
J/C
B-R
6 7
W-RCowl Side J/B LH
2E
2A 41 10
BatteryF15
FL Block
MAINB-G Engine Room J/B
1C 1B1 9AM2
W-R I18
Ignition SW
2 AM2 IG2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-923
111 6 Author: Date:
2004 LAND CRUISER (RM1071U)
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 differ from the other circuits in that when the SRS
warning light remains on and the DTC shows a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and when the source voltage returns
to normal, the SRS warning light automatically goes off.
DTC No.Diagnosis
(Normal)Source voltage drop
WIRING DIAGRAM
DI8FC-09
Page 1713 of 3115
H21249
Airbag Sensor
Assembly
Cowl Side J/B RH
C2619
TC 3F10
2D18 P-B
W-BP-B D7
DLC3
3E 14
7B5
W-B 13
4 CGTC
IF 7B4 J/B No. 7
P-B DI-932
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1125 Author: Date:
2004 LAND CRUISER (RM1071U)
TC Terminal Circuit
CIRCUIT DESCRIPTION
DTC output mode is set by connecting terminal TC and CG of the DLC3 the airbag sensor assembly.
The DTCs are displayed by blinking the SRS warning light.
WIRING DIAGRAM
DIB46-02
Page 1714 of 3115
AB0117AB0119H20916H21240
ON LOCK
AB0119H10688H10654
ON
CG
TC
(+) (-)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-933
1126 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
If the DTC is not displayed, do the following troubleshooting.
1 Does SRS warning light light up for approx. 6 seconds?
CHECK:
Check operation of the SRS warning light after ignition switch
is turned from LOCK position to ON position.
NO Check SRS warning light system.
(See page DI-927)
YES
2 Check voltage between terminal TC and CG of DLC3.
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Measure the voltage between terminal TC and CG of DLC3.
OK:
Voltage: 4 - 14 V
OK Go to step 4.
NG
Page 1716 of 3115
AB0119H01304H01305
LOCKAirbag Sensor Assembly
TC
(+)
(-)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-935
1128 Author: Date:
2004 LAND CRUISER (RM1071U)
If the DTC is displayed without a DTC check procedure, perform the following
troubleshooting.
1 Check resistance between terminal TC of airbag sensor assembly and body
ground.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
CHECK:
Check resistance between terminal TC of the airbag sensor as-
sembly connector and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector.
OK
Replace airbag sensor assembly.
Page 1718 of 3115
DI6OZ-25
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-701
894 Author: Date:
2004 LAND CRUISER (RM1071U)
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-71 1)
Short in D squib circuitSteering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Dash wire
Column wire
ON
B0101/14
(DI-717)
Open in D squib circuitSteering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Dash wire
Column wire
ON
B0102/11
(DI-722)
Short in D squib circuit (to ground)Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Dash wire
Column wire
ON
B0103/12
(DI-727)
Short in D squib circuit (to B+)Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Dash wire
Column wire
ON
B0105/53
(DI-732)Short in P squib circuitFront passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B0106/54
(DI-736)Open in P squib circuitFront passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B0107/51
(DI-739)Short in P squib circuit (to ground)Front passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B0108/52
(DI-742)Short in P squib circuit (to B+)Front passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B0110/43
(*1)
(DI-745)Short in side squib RH circuitSide airbag assembly RH (squib)
Airbag sensor assembly
Floor No. 2 wire
Blink
B0111/44
(*1)
(DI-749)Open in side squib RH circuitSide airbag assembly RH (squib)
Airbag sensor assembly
Floor No. 2 wire
Blink
B0112/41
(*1)
(DI-752)Short in side squib RH circuit
(to ground)Side airbag assembly RH (squib)
Airbag sensor assembly
Floor No. 2 wire
Blink
B0113/42
(*1)
(DI-755)Short in side squib RH circuit
(to B+)Side airbag assembly RH (squib)
Airbag sensor assembly
Floor No. 2 wire
Blink
B0115/47
(*1)
(DI-758)Short in side squib LH circuitSide airbag assembly LH (squib)
Airbag sensor assembly
Floor No. 1 wire
Blink
Page 1721 of 3115
DI-704
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
897 Author: Date:
2004 LAND CRUISER (RM1071U)B1183/22
(DI-898)
Short in D squib (2nd step) circuit
(to B+)Steering wheel pad (D squib, 2nd step)
Spiral cable
Airbag sensor assembly
Dash wire
Column wire
ON
B1185/57
(DI-903)Short in P squib (2nd step) circuitFront passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B1186/58
(DI-907)Open in P squib (2nd step) circuitFront passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B1187/55
(DI-910)Short in P squib (2nd step) circuit
(to ground)Front passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B1188/56
(DI-913)Short in P squib (2nd step) circuit
(to B+)Front passenger airbag assembly (squib)
Airbag sensor assembly
Dash wire
ON
B1628/29
(*1)
(DI-913)RSCA cutoff switch indicatorRSCA cutoff switch
Airbag sensor assembly
Dash wire
Instrument panel wire
Blink
NlSystem normal-OFFNormal
(DI-923)Voltage source dropBattery
Airbag sensor assemblyON
*1: w/ Side Airbag
HINT:
When the SRS warning light remains lit up and the DTC is the normal code, a voltage source drop is
possible.
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, smaller numbered code will be shown first.
If a code not listed on the chart is displayed, the airbag sensor assembly is at fault.
In the case of any malfunction concerning any open circuit, ground short, or B+ short due to any squib,
another malfunction code may not be detected. In this case, correct the malfunction currently indicated
and then perform malfunction diagnosis again. Another malfunction code may then be detected.
Page 1724 of 3115
DIB3P-01
A04550
13 9 14 10 15 11 16 1251 62 73 84
DLC3
H20916
DI-692
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
885 Author: Date:
2004 LAND CRUISER (RM1071U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the DLC3.
HINT:
The vehicle's ECM uses ISO 9141-2 for communication. The
terminal arrangement of the DLC3 complies with SAE J1962
and matches the ISO 9141-2 format.
Terminal No.Connection/Voltage or ResistanceCondition
7Bus Line/Pulse generationDuring Transmission
4Chassis Ground e Body Ground/1 W or lessAlways
16Battery Positive e Body Ground/ 9 - 14 VAlways
HINT:
If your display shows UNABLE TO CONNECT TO VEHICLE
when you have connected the cable of the OBD II scan tool or
TOYOTA hand-held tester to the DLC3, turned the ignition
switch ON and operated the scan tool, there is a problem on the
vehicle side or tool side.
If communication is normal when the tool is con-
nected to another vehicle, inspect the DLC3 on the
original vehicle.
If communication is still not possible when the tool
is connected to another vehicle, the problem is
probably in the tool itself, so consult the Service De-
partment listed in the tool's instruction manual.
2. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch to ON, and check that the SRS
warning light comes on.
(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 comes on even when the ignition
switch is OFF. In this case, a short in the SRS warning light
circuit is possible. Proceed to ºSRS warning light circuit
malfunctionº on page DI-927.
