TOYOTA AVENSIS 2005 Service Repair Manual

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)

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)

05±1660
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
(a) Disconnect the DA, DB, DN, I14 J/B, A13 or A15 and C10 ECU connectors.
(b) Check the voltage or resistance of each terminal of the wire harness side connectors.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
B (DN±1) ± *1
B±G ± Body groundConstant10 to 14 VB (DN 1)
Body ground
*2
B±L ± Body groundConstant10 to 14 V
B (DB±16) ±
Body groundW±R ± Body groundConstant10 to 14 V
E (DA±9) ±
Body groundW±B ± Body ground
*3
MPX1 (I14±11) ±
MPX± (A13±29)
PPConstantBelow 1
*4
MPX1 (I14±11) ±
MPX± (A15±20)P ± PConstantBelow 1

MPX2 (I14±22) ±
BEAN (BODY) (C10±14)P±B ± P±B
HINT:
*
1: Gasoline
*
2: 1CD±FTV
*
3: Except automatic A/C
*
4: Automatic A/C
If the result is not as specified, there may be a malfunction on the wire harness side.

B67959
E11 E9ECM
A13
C10A/C Control Assy
(A/C ECU)
Combination Meter Assy
(Combination Meter ECU)
A15
Except Automatic A/CAutomatic A/C
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1661
AVENSIS REPAIR MANUAL (RM1018E)
2. CHECK ECM FOR 1AZ±FSE
(a) Disconnect the A13 or A15, C10 ECU, E9, E10 and E11 ECM connectors.
(b) Check the voltage and resistance of each terminal of the wire harness side connectors.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
E1 (E11±1) ± Body groundBR ± Body groundConstantBelow 1

+B (E9±1) ± E1 (E11±1)B±R ± BR
+B2 (E9±2) ± E1 (E11±1)B±R ± BRConstant10 to 14 V
BATT (E9±3) ± E1 (E11±1)B±Y ± BR
MPX1 (E10±18) ± BEAN (C10±13)P ± P
*1
MPX2 (E10±29) ± MPX+ (A13±9)PB PBConstantBelow 1

*2
MPX2 (E10±29) ± MPX+ (A15±10)P±B ± P±B
HINT:
*
1: Except Automatic A/C
*
2: Automatic A/C
If the result is not as specified, there may be a malfunction on the wire harness side.

B67962
ECM
A15
C10A13E9
E12
A/C Control Assy
(A/C ECU)
Combination Meter Assy
(Combination Meter ECU)
Except Automatic A/CAutomatic A/C
05±1662
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3. CHECK ECM FOR 1AZ±FE, 1ZZ±FE, 3ZZ±FE
(a) Disconnect the A13 or A15, C10 ECU, E9 and E12 ECM connectors.
(b) Check the voltage or resistance of each terminal of the wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
E1 (E12±7) ±
Body groundBR ± Body groundConstantBelow 1

+B (E9±1) ± E1 (E12±7)B±R ± BR
BATT (E9±3) ±
E1 (E12±7)B±Y ± BRConstant10 to 14 V
MPX1 (E9±23) ±
BEAN (C10±13)P ± P
*1
MPX2 (E9±29) ±
MPX+ (A13±9)
PB PB
ConstantBelow 1

*2
MPX2 (E9±29) ±
MPX+ (A15±10)P±B ± P±B
HINT:
*
1: Except Automatic A/C
*
2: Automatic A/C
If the result is not as specified, there may be a malfunction on the wire harness side.

B67960
ECM
A15
C10A13E9
E10 E12
A/C Control Assy
(A/C ECU)
Combination Meter Assy
(Combination Meter ECU)
Except Automatic A/CAutomatic A/C
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1663
AVENSIS REPAIR MANUAL (RM1018E)
4. CHECK ECM FOR 1CD±FTV
(a) Disconnect the A13 or A15, C10 ECU, E9, E10 and E12 ECM connectors.
(b) Check the voltage or resistance of each terminal of the wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
E1 (E12±7) ±
Body groundBR ± Body groundConstantBelow 1

+B E9±1) ±
E1 (E12±7)B±W ± BR
Constant10 to 14 VBATT (E10±2) ±
E1 (E12±7)B±Y ± BR
Constant10 to 14 V
MPX1 (E9±20) ±
BEAN (C10±13)P ± P
*1
MPX2 (E9±21) ±

MPX+ (A13±9)PB PB
ConstantBelow 1

*2
MPX2 (E9±21) ±
MPX+ (A15±10)P±B ± P±B
HINT:
*
1: Except Automatic A/C
*
2: Automatic A/C
If the result is not as specified, there may be a malfunction on the wire harness side.

B67983
A13
ECM (1AZ±FSE)
ECM (1AZ±FE, 1ZZ±FE, 3ZZ±FE)
ECM (1CD±FTV)
E9E10
E9 A/C Control Assy
(A/C ECU)
I14
Instrument Panel J/B Assy
(Integration Relay)
05±1664
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5. CHECK A/C CONTROL ASSY EXCEPT AUTO (A/C ECU)

± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1665
AVENSIS REPAIR MANUAL (RM1018E)
(a) Disconnect the A13 ECU, E9 or E10 ECM and I14 J/B connectors.
(b) Check the voltage or resistance of each terminal of the wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
GND (A13±40) ±
Body groundW±B ± body groundConstantBelow 1

+B A13±2) ±
GND (A13±40)W±R ± W±BConstant10 to 14 V
MPX± (A13±29) ±
MPX1 (I14±11)P ± P
*1
MPX+ (A13±9) ±
MPX2 (E10±29)P±B ± P±B
ConstantBelow 1
*2
MPX+ (A13±9) ±
MPX2 (E9±29)P±B ± P±B
ConstantBelow 1

*3
MPX+ (A13±9) ±
MPX2 (E9±21)P±B ± P±B
HINT:
*
1: 1AZ±FSE
*
2: 1AZ±FE, 1ZZ±FE, 3ZZ±FE
*
3: 1CD±FTV
If the result is not as specified, there may be a malfunction on the wire harness side.

B67984
A15
ECM (1AZ±FSE)
ECM (1AZ±FE, 1ZZ±FE, 3ZZ±FE)
ECM (1CD±FTV)
E9 E10
E9A16
I14A/C Control Assy
(A/C ECU)
Instrument Panel J/B Assy (Integration Relay)
05±1666
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
6. CHECK A/C CONTROL ASSY FOR AUTO (A/C ECU)

B69311
T6
C10 Combination Meter Assy
(Combination Meter ECU)Theft Warning ECU Assy
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05±1667
AVENSIS REPAIR MANUAL (RM1018E)
(a) Disconnect the A15, A16 ECU, E9 or E10 ECM and I14 J/B connectors.
(b) Check the voltage or resistance of each terminal of the wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
GND (A16±13) ±
Body groundW±B ± Body groundConstantBelow 1

+B (A16±24) ±
GND (A16±13)W±R ± W±BConstant10 to 14 V
MPX± (A15±20) ±
MPX1 (I14±11)P ± P
*1
MPX+ (A15±10) ±
MPX2 (E10±29)P±B ± P±B
ConstantBelow 1
*2
MPX+ (A15±10) ±
MPX2 (E9±29)P±B ± P±B
ConstantBelow 1

*3
MPX+ (A15±10) ±
MPX2 (E9±21)P±B ± P±B
HINT:
*
1: 1AZ±FSE
*
2: 1AZ±FE, 1ZZ±FE, 3ZZ±FE
*
3: 1CD±FTV
If the result is not as specified, there may be a malfunction on the wire harness side.
7. CHECK THEFT WARNING ECU ASSY
(a) Disconnect the T6 and C10 ECU connectors.
(b) Check the voltage or resistance of each terminal of the wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
E (T6±29) ±
Body groundW±B ± Body groundConstantBelow 1

+B1 (T6±2) ± E (T6±29)W±R ± W±BConstant10 ± 14 V
MPX (T6±31) ±
BEAN (Security)(C10±15)P±L ± P±LConstantBelow 1

If the result is not as specified, there may be a malfunction on the wire harness side.