Page 1705 of 5135
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
Page 1706 of 5135

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)
Page 1707 of 5135
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
Page 1708 of 5135
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
Page 1709 of 5135
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
Page 1710 of 5135
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
Page 1711 of 5135

B67602
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±1679
AVENSIS REPAIR MANUAL (RM1018E)
8 CHECK WIRE HARNESS
(INTEGRATION RELAY ± A/C ECU)
(INTEGRATION RELAY ± COMBINATION METER ECU)
(a) Disconnect the A/C ECU, combination meter ECU and integration relay connectors.
(b) Check the wire harness (MPX lines) between the integration relay and A/C ECU as well as in between
the integration relay and combination ECU.
(1) Turn the ignition switch ON.
(2) Check the voltage between the wire harness (MPX lines) and the body ground.
Standard:
Tester ConditionSpecified Condition
Integration relay or A/C ECU ± Body ground0VIntegration relay or combination meter ECU ± 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 lines) and the body ground.
Standard:
Tester ConditionSpecified Condition
Integration relay or A/C ECU ± Body ground10 kor higherIntegration relay or combination meter ECU ± 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.
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (INTEGRATION RELAY)
Page 1712 of 5135
05C5M±01
B67982 DA
Vehicle Front Side
Vehicle Rear Side
DADB
DN
DB
DN
I14
I14
A13
C10A/C Control Assy
(A/C ECU)
Combination Meter Assy
(Combination Meter ECU)A15
Except Automatic A/C
Automatic A/C
Instrument Panel J/B Assy
(Integuration Relay)
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1659
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECU
1. CHECK INSTRUMENT PANEL J/B ASSY (INTEGRATION RELAY)