TOYOTA AVENSIS 2005 Service Repair Manual

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

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

B67601
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
E9*1 or E10*2C10
05±1676
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5 CHECK WIRE HARNESS (COMBINATION METER ECU ± ECM)
(a) Check whether the output of the DTC stops when the E10*1or E9*2 connector of the ECM and the C10
connector of the combination meter ECU are disconnected.
HINT:
When the output of the DTC stops, the wire harness between the E10*
1 or E9*2 connector of the ECM and
the C10 connector of the combination meter ECU is malfunctioning.
*
1: 1AZ±FSE
*
2: Except 1AZ±FSE
YES REPAIR OR REPLACE HARNESS AND
CONNECTOR
NO

B67972
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±1677
AVENSIS REPAIR MANUAL (RM1018E)
6 CHECK DTC (A/C ECU)
(a) Check whether the output of the DTC stops when the A/C ECU connector is disconnected.
HINT:
When the output of the DTC stops, the A/C ECU is malfunctioning.
YES REPLACE AIR CONDITIONING CONTROL ASSY
(A/C ECU)
NO

B67973
Theft Warning ECU Assy Combination Meter Assy
(Combination Meter ECU) Air Conditioning Control Assy
(A/C ECU)Instrument Panel J/B Assy
(Integration Relay)
ECM
E9*3 or E10*4A13*1 or A15*2
05±1678
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
7 CHECK WIRE HARNESS (A/C ECU ± ECM)
(a) Check whether the output of the DTC stops when the A13*1 or A15*2 connector of the A/C ECU and
the E10*
3 or E9*4 connector of the ECM are disconnected.
HINT:
When the output of the DTC stops, the wire harness between the
A13*1 or A15*2 connector of the A/C ECU
and the E10*
3 or E9*4 connector of the ECM is malfunctioning.
*
1: Except Automatic A/C
*
2: Automatic A/C
*
3: 1AZ±FSE
*
4: Except 1AZ±FSE
YES REPAIR OR REPLACE HARNESS AND
CONNECTOR
NO