2005 TOYOTA AVENSIS diagram

B52550
I12
Transponder Key AmplifierT8
Transponder Key ECU Assy
Y±G
CODE
411CODE
05±1624
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC B2797 COMMUNICATION MALFUNCTION NO.1
CIRCUIT DESCRIPTION
This DTC is output when an error occurs in normal communication.
HINT:
Some noise is found in the communication line.
DTC No.DTC Detection ConditionTrouble Area
B2797Keys are positioned too close to each other or noise oc-
curred in communication line

Key

Wire harness

Transponder key amplifier

Transponder key ECU assy
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK OPERATION OF TRANSPONDER KEY AMPLIFIER
(a) After replacing the transponder key amplifier, check that the engine starts.
OK NORMAL
(TRANSPONDER KEY AMPLIFIER DEFECTIVE)
NG
REPLACE TRANSPONDER KEY ECU ASSY
05B0I±03

B62676
I12
Transponder Key AmplifierT8
Transponder Key ECU Assy
VC5
CODE
TXCT
AGND Y±B
Y±G
L±R
GR±R8
11
12
13 1
4
5
7 TXCT
GND
ANT2 ANT1 VC5
CODE
CoilAmplifier
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
05±1621
AVENSIS REPAIR MANUAL (RM1018E)
DTC B2796 NO COMMUNICATION IN IMMOBILISER
SYSTEM
DTC B2798 COMMUNICATION MALFUNCTION NO.2
CIRCUIT DESCRIPTION
This code is stored in the memory when a key that does not have a transponder chip is inserted or if commu-
nication between the key and transponder key ECU is impossible.
DTC No.DTC Detection ConditionTrouble Area
B2796No communication

Key

Wire harness

Transponder key amplifier (Transponder key coil)

Transponder key ECU assy
B2798Communication error
Key
WIRING DIAGRAM
05B0H±03

B62676
I12
Transponder Key AmplifierT8
Transponder Key ECU Assy
VC5
CODE
TXCT
AGND Y±B
Y±G
L±R
GR±R8
11
12
13 1
4
5
7 TXCT
GND
ANT2 ANT1 VC5
CODE
CoilAmplifier
05±1616
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC B2784 ANTENNA COIL OPEN/SHORT
CIRCUIT DESCRIPTION
The transponder key coil is built into the transponder key amplifier and receives a key code signal from the
transponder chip in the key. This signal is amplified by the amplifier and then output to the transponder key
ECU.
DTC No.DTC Detection ConditionTrouble Area
B2784Antenna coil is open/short

Wire harness

Transponder key amplifier

Transponder key ECU assy
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 READ VALUE OF HAND±HELD TESTER
(IMMOBILISER ECU (TRANSPONDER KEY ECU ASSY) (SWITCH CONDITION))
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON with the key that will not start the engine.
(c) Select the item ANTENNA COIL on the hand±held tester.
OK: NORMAL
NG: FAIL
OK CHECK AND REPLACE TRANSPONDER KEY
ECU ASSY
NG
05B0D±03

B66226
T8
Transponder Key ECU Assy
10KSW
12 U1
Un±lock Warning
Switch Assy
IO: Gasoline
IL: 1CD±FTV J16
J/C W±BW±B
Y
J22F
J23 DJ/C
AY
W±B*
1
W±B*2
*1: LHD
*2: RHD IP CA 6CF 13
Center J/BY*
2
DA 6
DA8
Y*
1
Driver Side J/B*1
Passenger Side R/B Assy*2
Y*1
Y*2
W±BA
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
05±1613
AVENSIS REPAIR MANUAL (RM1018E)
DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING
SWITCH MALFUNCTION
CIRCUIT DESCRIPTION
This DTC will be output if the transponder key ECU does not detect that the unlock warning switch is ON
even when the ignition switch is ON (Under normal conditions, the unlock warning switch is ON when the
ignition switch is ON).
DTC No.DTC Detection ConditionTrouble Area
B2780Unlock warning switch ON is not detected when ignition
switch is ON
Unlock warning switch assy

Wire harness

Transponder key ECU assy
WIRING DIAGRAM
05B0C±03

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

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

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

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