2005 TOYOTA AVENSIS diagnostic

B67805
Battery23
+BMPX1
P±BECM
E10 13
E1
E11 48 BEAN
(EFI) Except for 1CD±FTV
E9
C1018
MPX2 E10 E9 P Combination Meter Assy
(Combination Meter ECU)
29 29
A15
A13 A/C Control Assy
(A/C ECU)
MPX+
E91
B±R*
2
B±R*1,
3IK1 EA112
B±R
B±R
E92 J14 J28DD
*
1: 1AZ±FE
*2: 1AZ±FSE
*
3: 1ZZ±FE, 3ZZ±FE
*
4: Except Automatic A/C
*5: Automatic A/C
*
6: LHD
*7: RHD
*
8: Unleaded Gasoline *
7*6*7*6
J14
J28DD
J14
J28DD
*
7*6
B±R
IE4 IP132
*
7*6
4
2
1 EFI NO.1
B±W
4 4
44 2
13
5
W±B
ECB±Y
2
1EFI+B2
BATT E93 B±Y
IE37
B±Y 71
1
1A
B±G4A
4B1
1
B±G
MainE12 9
10
*1,
3*2
*1,
3
*2
*4*5
*2 *1,
3
B±R
Engine Room R/B No. 4
J/C
EF*
1
EE*2
EH*3
EFI Relay
GR
To terminal MREL of ECM
Engine Room R/B
GR*8
To A/F Relay
IO17
*
7*6
1BR
*1,
2,
3
B±R*2
Engine Room R/B No. 4
Engine Room J/B No. 4
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1681
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

B67806
1CD±FTVECM Combination Meter Assy
(Combination Meter ECU)
A/C Control Assy
(A/C ECU)
+BMPX1
E1 MPX2
BATT E9
E9
E9
E10
E12 P±BP
B±W B±W
B±W
B±Y
B±Y
*
1: LHD
*2: RHD
*
3: Except Automatic A/C
*
4: Automatic A/C 910 C1013
BEAN
(EFI)
A15
A13 MPX+20
21
1
2
7 IK18
EE110
1
1
1 1
2
15 3 ECIO17
BR
EI 1
12
EFI
1A
B3
3
Battery FL Main
*3 *4
W±B
Engine Room R/B
B±Y
Engine Room R/BTo terminal
MREL of ECM
B 1IE37
*1 *2
EFI MAIN Relay
Engine Room R/B
No. 3 05±1682
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)

B68027
Wire Harness Side
E10
*2
ECM
E9
*1,
3,
4
ECM
C10
Combination Meter Assy
(Combination Meter ECU)
A13
*5
A/C Control Assy
(A/C ECU)
A15
*6
A/C Control Assy
(A/C ECU)
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1683
AVENSIS REPAIR MANUAL (RM1018E)
1 CHECK RESISTANCE OF COMMUNICATION LINE
(a) Disconnect the E9 or E10 ECM, C10 and A13 or A15 ECU
connectors.
(b) Check the resistance between wire harness side connec-
tors.
Standard:
1AZ±FSE
Tester ConnectionSpecified Condition
E10±18 (MPX1) ± C10±13 (BEAN)
*5
E10±29 (MPX2) ± A13±9 (MPX+)Below 1

*6
E10±29 (MPX2) ± A15±10 (MPX+)
1AZ±FE, 1ZZ±FE, 3ZZ±FE
Tester ConnectionSpecified Condition
E9±23 (MPX1) ± C10±13 (BEAN)
*5
E9±29 (MPX2) ± A13±9 (MPX+)Below 1

*6
E9±29 (MPX2) ± A15±10 (MPX+)
1CD±FTV
Tester ConnectionSpecified Condition
E9±20 (MPX1) ± C10±13 (BEAN)
*5
E9±21 (MPX2) ± A13±9 (MPX+)Below 1

*6
E9±21 (MPX2) ± A15±10 (MPX+)
HINT:
*
1: 1AZ±FE
*
2: 1AZ±FSE
*
3: 1ZZ±FE, 3ZZ±FE
*
4: 1CD±FTV
*
5: Except Automatic A/C
*
6: Automatic A/C
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK

B68150
Wire Harness Side
E10
ECM
E9
ECM
B68151
Wire Harness Side
E12
*1
ECM
E11
*2
ECM
05±1684
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2 CHECK ECM (POWER SOURCE)
(a) Disconnect the E10 or E9 ECM connector.
(b) Check the voltage between the wire harness side con-
nectors and the body ground.
Standard:
Tester ConnectionSpecified Condition
+B (E9±1) ± Body ground
*1
+B2 (E9±2) ± Body ground10 to 14 V*1
BATT (E9±3) ± Body ground10 to 14 V
*2
BATT (E10±2) ± Body ground
HINT:
*
1: Except 1CD±FTV
*
2: 1CD±FTV
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK ECM (GROUND)
(a) Disconnect the E12 or E11 ECM connector.
(b) Check the resistance between the wire harness side con-
nectors and the body ground.
Standard:
Tester ConnectionSpecified Condition
*1
E12±7 (E1) ± Body groundBelow 1
*2
E11±1 (E1) ± Body groundBelow 1

HINT:
*
1: Except 1AZ±FSE
*
2:1AZ±FSE
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE ECM

05±1670
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC B1214 DOOR SYSTEM COMMUNICATION BUS
MALFUNCTION (+B SHORT)
DTC B1215 DOOR SYSTEM COMMUNICATION BUS
MALFUNCTION (GND SHORT)
CIRCUIT DESCRIPTION
DTCs B1214 and B1215 are output when +B and the body ground is short±circuited on the communication
bus. Detecting this condition disables all the BEAN communication and outputs some DTCs.
DTC No.DTC Detection ConditionTrouble Area
B1214Communication circuit and +B battery system short

ECM

A/C control assy (A/C ECU)

Combination meter assy

Theft warning ECU assy

Wire harness

Instrument panel J/B assy (Integration relay)
B1215Communication circuit and body ground short

ECM

A/C control assy (A/C ECU)

Combination meter

Theft warning ECU assy

Wire harness

Instrument panel J/B assy (Integration relay)
05C5P±01

B67596
Theft Warning ECU AssyInstrument Panel J/B Assy
(Integration Relay)
I14
MPX1 11
P
IC110
P
A1329
A1520
*
1*2*1*2
A/C Control Assy
(A/C ECU)
A13
A159 10
P±B
E10
E10 E9
E9
E9
E9 21*
5
29*3
29*4
18*3
23*4
20*5
I14 22
MPX2 P±B
P±B P
IC11
C1014
C10
C10 13
15
P±L*
6
ECM
Combination Meter Assy
(Combination Meter ECU)
T631
MPX *
1: Except Automatic A/C
*2: Automatic A/C
*
3: 1AZ±FSE
*
4: 1AZ±FE, 1ZZ±FE, 3ZZ±FE
*5: 1CD±FTV
*
6: w/ Theft Deterrent System
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1671
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

B67598
Instrument Panel J/B Assy
(Integration Relay)
Theft Warning ECU Assy Combination Meter Assy
(Combination Meter ECU) ECM A/C Control Assy
(A/C ECU)
05±1672
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
NOTICE:
Disconnect connectors in operational sequence and start the next operation after the connector is
connected.
1 CHECK DTC (THEFT WARNING ECU ASSY)
(a) Check whether the outputs of the DTC stops when the theft warning ECU connector is disconnected.
HINT:
When the output of the DTC stops, the theft warning ECU is malfunctioning.
YES REPLACE THEFT WARNING ECU ASSY
NO

B67599
Theft Warning ECU Assy Combination Meter Assy
(Combination Meter ECU) A/C Control Assy
(A/C ECU)Instrument Panel J/B Assy
(Integration Relay)
ECM
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1673
AVENSIS REPAIR MANUAL (RM1018E)
2 CHECK DTC
(COMBINATION METER ECU AND WIRE HARNESS)
(a) Check whether the outputs of the DTC stops when the combination meter ECU connector is discon-
nected.
HINT:
When the output of the DTC stops, the combination meter ECU itself or the wire harness between the com-
bination meter ECU and the theft warning ECU is malfunctioning.
NO Go to step 4
YES