2005 TOYOTA AVENSIS warning

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

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

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

B69061
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
T6 connector C10 connector
05±1674
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3 CHECK WIRE HARNESS
(COMBINATION METER ECU ± THEFT WARNING ECU ASSY)
(a) Disconnect the combination meter ECU and theft warning ECU connectors.
(b) Check the wire harness (MPX line) between the combination ECU and theft warning ECU.
(1) Turn the ignition switch ON.
(2) Check the voltage between the wire harness (MPX line) and the body ground.
Standard:
Tester ConditionSpecified Condition
BEAN (SECURITY) (C10±15) or MPX (T6±31) ± Body ground0 V
If the output voltage is not 0 V, the wire harness (MPX line) may be short±circuited with +B.
(3) Check the resistance between the wire harness (MPX line) and the body ground.
Standard:
Tester ConditionSpecified Condition
BEAN (SECURITY) (C10±15) or MPX (T6±31) ± Body ground10 kor higher
When the resistance is 10 kor higher, the wire harness (MPX line) and body ground may be short±circuited
with the body ground.
NO REPAIR OR REPLACE HARNESS AND
CONNECTOR
YES
REPLACE COMBINATION METER ASSY (COMBINATION METER ECU)

B67600
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±1675
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK DTC (ECM)
(a) Check whether the output of the DTC stops when the ECM connector is disconnected.
HINT:
When the output of the DTC stops, the ECM is malfunctioning.
YES REPLACE ECM
NO