Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21q2h73z citcterm
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05-1 113
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM 05NTG-01
TC TERMINAL CIRCUIT
CIRCUIT DESCRIPTION
The DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by blinking the SRS warning light.
HINT:
S Make sure that DTC B1281 has not been output. If DTC B1281 has been output, refer to the multiplex
communication system.
S When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an
internal ground short in each ECU is suspected.
S The DTC output mode signal is transmitted through BEAN to each ECU including the airbag sensor
assy center, except for the skid control ECU with actuator. Thus when all systems except the ABS sys-
tem do not enter DTC output mode, it can be suspected that there is an ECM malfunction.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1296
05-1 114
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
WIRING DIAGRAM
Body Airbag Sensor
ECU Assy Center
Driver Side J/B
7 22
R-L
MPX1 1E A21 MPX2
14
J19
J/C
21
R-L R-L
MPX2 B7
13 33
P25 Power Slide
Door ECU LH
6
R
MPX1 BD1
22
R-L
P13 Power Back
J37
Door ECU
J/C 21 J/C
20 4
R-L R-L R-L
MPX1 J14 J13
22 1 11 73
P27 Power Slide
Door ECU RH
J/C
6 6 23
R R-L R-L
MPX1 BJ1 J36 J35
22 3
C10
A9 A/C Control J19 Combination Meter
Assembly J/C
V V R-L
MPX+
2 60 32 28 29
R-L R-L D1
MPX-
3 70 90 DLC3
P-B W-B J20
ECM TC CG J/C
13 4 51
18
R-L 42
MPX1 E5 Driver Side J/B
29 32 6 24
MPX2 E5 V V R-L
1H 1E A21 MPX1
J18 J/C
20 34 10
P-B P-B P-B P-B
TC E4 1H 1L
19 29
14
S3 P-B W-B
1K
Skid Control ECU
J/C
10 22
P-B P-B IG
TC J7 J8
8
H45989
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1297
05-1 115
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 CHECK WIRE HARNESS(DLC3 - ECM)
DLC3: (a) Turn the ignition switch to the LOCK position.
TC
D1 (b) Disconnect the airbag sensor assy center connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connection Condition Specified condition
D1-13 (TC) -
Always Below 1
E4-20 (TC)
ECM:
E4
H40173 TC
A67445 H44085 NG REPAIR OR REPLACE WIRE HARNESS
OK
2 CHECK WIRE HARNESS(CG of DLC3 - BODY GROUND)
(a) Measure the resistance according to the value(s) in the
D1 DLC3
table below.
Standard:
Tester connection Condition Specified condition
D1-4 (CG) -
Always Below 1
Body ground
NG REPAIR OR REPLACE WIRE HARNESS
CG H40173
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1298
05-1 116
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 CHECK WIRE HARNESS(TC of ECM - BODY GROUND)
ECM: (a) Measure the resistance according to the value(s) in the
table below.
Standard:
E4 Tester connection Condition Specified condition
E4-20 (TC) -
Always 1M or Higher
Body ground
TC A67445 NG REPAIR OR REPLACE WIRE HARNESS
OK
4 REPLACE ECM
(a) Check the ECM.
Result:
A: Normal system code is output.
B: DTC is output.
C: DTC output mode is set.
A END
B GO TO INSPECTION PROCEDURE OF DTC
OUTPUT (SEE PAGE 05-790 )
C
REPLACE AIR BAG SENSOR ASSY CENTER (SEE PAGE 60-56 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1299
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