Page 1689 of 5135
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1689
AVENSIS REPAIR MANUAL (RM1018E)
DTC B1269 THEFT DETERRENT ECU COMMUNICATION
STOP
CIRCUIT DESCRIPTION
DTC B1269 is output when communication between the theft warning ECU and the combination meter stops
for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1269No communication from theft deterrent ECU for more than
10 secondsTheft warning ECU assy
Wire harness
05AEV±02
Page 1690 of 5135
B67807
Main
Battery 131
+B1MPX
E Theft Warning ECU Assy
B*
2
2H 5J/C
IP2 T6
W±R
B±G*
1
1A6
T6 IP1
B±W
CG B±W
1
*
1: Except 1CD±FTV
*2: 1CD±FTV BEAN
(SECURITY)
3W±B 1Combination Meter Assy
(Combination Meter ECU)
P±L
C1015
J27
J26F
W±R
6
1 DOME
2
T6 29
CA9
6
W±B *
2
B
*1
B±G
4A
4B
31
1
Engine Room J/B No. 4*1
Engine Room R/B
Engine Room
R/B No. 3*
2
Center J/B Fuse Block Assy
DCC 05±1690
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
Page 1691 of 5135
B68155
Wire Harness Side
C10
Combination Meter Assy
(Combination Meter ECU) T6
Theft Warning ECU Assy
B65849
Wire Harness Side
T6
Theft Warning ECU Assy
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1691
AVENSIS REPAIR MANUAL (RM1018E)
1 CHECK RESISTANCE OF COMMUNICATION LINE
(a) Disconnect the T6 and C10 ECU connectors.
(b) Check the resistance between wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified Condition
T6±31 (MPX) ±
C10±15 (BEAN) (Security)Below 1
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
2 CHECK THEFT WARNING ECU ASSY
(POWER SOURCE)
(a) Disconnect the T6 ECU connector.
(b) Check the voltage between the wire harness side con-
nector and the body ground.
Standard:
Tester ConnectionSpecified Condition
T6±2 (+B1) ± Body ground10 to 14 V
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
Page 1692 of 5135
B65849
Wire Harness Side
T6
Theft Warning ECU Assy
05±1692
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3 CHECK THEFT WARNING ECU ASSY (GROUND)
(a) Disconnect the T6 ECU connector.
(b) Check the resistance between the wire harness side con-
nector and the body ground.
Standard:
Tester ConnectionSpecified Condition
T6±29 (E) ± Body groundBelow 1
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE THEFT WARNING ECU ASSY
Page 1693 of 5135
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1685
AVENSIS REPAIR MANUAL (RM1018E)
DTC B1262 A/C ECU COMMUNICATION STOP
CIRCUIT DESCRIPTION
DTC B1262 will be output when the communication between the A/C ECU and the integration relay stops
for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1262No communication from A/C ECU for more than 10 se-
condsA/C control assy (A/C ECU)
Wire harness
05C5S±01
Page 1694 of 5135
B67808
Battery 120
J17
J/C+BMPX±
A1110
ECU±B 2
34IC1
CG DCCA15
P±B
IE4
3A13 I14
W±R
IK6CF7
B±W2
2
Main6 1Instrument Panel J/B Assy
(Integration Relay)
P
1A10A/C Control Assy
(A/C ECU)
A13
29
P
MPX1
MPX+ 10
A159
E10 29
29 21
E9
E9 MPX2
A132 24
A16 CC
6
1
3B*
5
B*5
GND
A13 40 13
A16 W±B*7
W±B*6
CA
IP*
1: Except Automatic A/C
*2: Automatic A/C
*
3: 1AZ±FSE
*
4: 1AZ±FE, 1ZZ±FE, 3ZZ±FE
*5: 1CD±FTV
*
6: LHD
*7: RHD ECM*
2
*1
*1
*2 *3
*4 *5
*1
*2
*2 *1
Center J/B
W±R Fuse Block Assy
B±W
Engine Room R/B No. 3*5
Engine Room R/B
Center J/B
*3,
4
B±GEngine Room J/B No. 4*3,
4
B±G*3,
4
4B 4A
1
1 5
IP1
1
A
W±B*
7
W±B*6
*6*7
J15
J/C A 05±1686
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
Page 1695 of 5135

B68152
Wire Harness Side
A13
*1
Air Conditioning Control Assy
A15
*2
Air Conditioning Control Assy
I14
Instrument Panel J/B Assy
(Integration Relay)
E10
*3
ECM
E9
*4,
5
ECM
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1687
AVENSIS REPAIR MANUAL (RM1018E)
1 CHECK RESISTANCE OF COMMUNICATION LINE
(a) Disconnect the A13 or A15, E10 or E9 and I14 connec-
tors.
(b) Check the resistance between wire harness side connec-
tors.
Standard:
1AZ±FSE
Tester ConnectionSpecified Condition
*1
A13±29 (MPX±) ± I14±11 (MPX1)
*2
A15±20 (MPX±) ± I14±11 (MPX1)Below 1*1
A13±9 (MPX+) ± E10±29 (MPX2)Below 1
*2
A15±10 (MPX+) ± E10±29 (MPX2)
1AZ±FE, 1ZZ±FE, 3ZZ±FE
Tester ConnectionSpecified Condition
*1
MPX± (A13±29) ± MPX1 (I14±11)
*2
MPX± (A15±20) ± MPX1 (I14±11)Below 1*1
MPX+ (A13±9) ± MPX2 (E9±29)Below 1
*2
MPX+ (A15±10) ± MPX2 (E9±29)
1CD±FTV
Tester ConnectionSpecified Condition
*1
MPX± (A13±29) ± MPX1 (I14±11)
*2
MPX± (A15±20) ± MPX1 (I14±11)Below 1*1
MPX+ (A13±9) ± MPX2 (E9±21)Below 1
*2
MPX+ (A15±10) ± MPX2 (E9±21)
HINT:
*
1: Except automatic A/C
*
2: Automatic A/C
*
3: 1AZ±FSE
*
4: 1AZ±FE, 1ZZ±FE, 3ZZ±FE
*
5: 1CD±FTV
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
Page 1696 of 5135

B68404
Wire Harness Side
A16
*2
A/C Control Assy A13
*1
A/C Control Assy
B68404
Wire Harness Side
A16
*2
A/C Control Assy A13
*1
A/C Control Assy
05±1688
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2 CHECK AIR CONDITIONING CONTROL ASSY (A/C ECU)
(POWER SOURCE)
(a) Disconnect the A13 or A16 ECU connector.
(b) Check the voltage between the wire harness side con-
nectors and the body ground.
Standard:
Tester ConnectionSpecified Condition
*1
A13±2 (+B) ± Body ground10 to 14 V*2
A16±24 (+B) ± Body ground10 to 14 V
*1: Except Automatic A/C
*
2: Automatic A/C
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK AIR CONDITIONING CONTROL ASSY (A/C ECU)
(GROUND)
(a) Disconnect the A13 or A16 ECU connector.
(b) Check the voltage between the wire harness side con-
nectors and the body ground.
Standard:
Tester ConnectionSpecified Condition
*1
A13±40 (GND) ± Body ground10 to 14 V*2
A16±3 (GND) ± Body ground10 to 14 V
*1: Except Automatic A/C
*
2: Automatic A/C
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE AIR CONDITIONING CONTROL ASSY