TOYOTA AVENSIS 2005 Service Repair Manual

054CK±07
05±1612
±
DIAGNOSTICS ENGINE IMMOBILISER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
SymptomSuspected AreaSee Page
Engine does not start
1. Key
2. Transponder key amplifier
3. Transponder key ECU assy05±1618
05±1619
05±1620
05±1621
05±1624
05±1625
05±1616
05±1621
05±1624
05±1625
05±1613
05±1616
05±1621
05±1624
05±1625

05B0B±02
B65593
I12
B55023
GND
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
05±1607
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECU
1. CHECK TRANSPONDER KEY AMPLIFIER (COIL)
(a) Disconnect the I12 amplifier connector and check the resistance between the terminal of the wire har-
ness side connector and body ground.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
GND (I12±7) ±
Body groundGR±R ± Body groundConstantBelow 1

If the result is not as specified, there may be a malfunction on the wire harness side.
(b) Reconnect the I12 amplifier connector and check the resistance or voltage of each terminal of the con-
nector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
VC5 (I12±1) ±
GND (I12±7)Y±B ± GR±RNo key in ignition key cylinder  With key0 V 10 to 14 V
CODE(I12±4) ±
GND (I12±7)Y±G ± GR±RNo key in ignition key cylinder  With keyWaveform 1
TXCT (I12±5) ±
GND (I12±7)L±R ± GR±RNo key in ignition key cylinder  With keyWaveform 2
GND (I12±7) ±
Body groundGR±R ± Body groundConstantBelow 1

If the result is not as specified, the amplifier may have a malfunction.
(c) Inspect using an oscilloscope.
Waveform 1 (Reference):
TerminalCODE ± GND
Tool Setting10 V/DIV., 10 ms/DIV.
ConditionIgnition switch ON

B55024
GND
B50659
T8 05±1608
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
Waveform 2 (Reference):
TerminalTXCT ± GND
Tool Setting10 V/DIV., 10 ms/DIV.
ConditionIgnition switch ON
2. CHECK TRANSPONDER KEY ECU ASSY
(a) Disconnect the T8 ECU connector and check the voltage and resistance between each terminal of the
wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
AGND (T8±13) ±
Body groundGR±R ± Body groundConstantBelow 1

+B (T8±1) ±
GND (T8±14)W±R ± W±BConstant10 to 14 V
IG (T8±2) ±
AGND (T8±13)B±W ± GR±RIgnition switch OFF ON0 V 10 to 14 V
KSW (T8±10) ±
AGND (T8±13)Y ± GR±RNo key in ignition key cylinder  With key10 k
or higher
Below 1

If the result is not as specified, there may be a malfunction on the wire harness side.
(b) Reconnect the T8 ECU connector and check the voltage between each terminal of the connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
KSW (T8±10) ±
AGND (T8±13)Y ± GR±RNo key in ignition key cylinder  With key10 to 14 V 0 V
VC5 (T8±8) ±
AGND (T8±13)Y±B ± GR±RIgnition switch OFF ON0 V 4.6 to 5.4 V
TXCT (T8±12) ±
AGND (T8±13)L±R ± GR±RIgnition switch OFF ONWaveform 1
CODE (T8±11) ±
AGND (T8±13)Y±G ± GR±RIgnition switch OFF ONWaveform 2
EFIO (T8±6) ±
AGND (T8±13)GR ± GR±RIgnition switch OFF ONWaveform 3
EFII (T8±7) ±
AGND (T8±13)W ± GR±RIgnition switch OFF ONWaveform 4
If the result is not as specified, the ECU may have a malfunction.

B69239
GND
B69240
GND
B69241
GND
B69242
GND
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
05±1609
AVENSIS REPAIR MANUAL (RM1018E)
(c) Inspect using an oscilloscope.
Waveform 1 (Reference):
TerminalTXCT ± GND
Tool Setting5 V/DIV., 20 ms/DIV.
ConditionIgnition switch ON
Waveform 2 (Reference):
TerminalCODE ± GND
Tool Setting10 V/DIV., 20 ms/DIV.
ConditionIgnition switch ON
Waveform 3 (Reference):
TerminalEFIO ± GND
Tool Setting5 V/DIV., 50 ms/DIV.
ConditionIgnition switch ON
Waveform 4 (Reference):
TerminalEFII ± GND
Tool Setting5 V/DIV., 50 ms/DIV.
ConditionConstant

B66228
E10E12E13E9
B50745
E11E12E13E9E10
05±1610
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3. CHECK ECM
3ZZ±FE, 1ZZ±FE , 1AZ±FE engine:
(a) Disconnect the E10 and E12 ECM connectors and check the voltage or resistance between each ter-
minal of the wire harness side connectors.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
IMI (E10±27) ±
E1 (E12±7)GR±R ± BRNo key in ignition key cylinder
With keyWaveform 1
IMO (E10±26) ±
E1 (E12±7)W ± BRNo key in ignition key cylinder
With keyWaveform 2
E1 (E12±1) ±
Body groundBR ± Body groundConstantBelow 1

1CD±FTV, 1AZ±FSE engine:
(b) Disconnect the E10 and E11 or E12 ECM connectors and check the voltage or continuity between
each terminal of the wire harness side connectors.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
*1 IMI (E10±30) ±
E1 (E12±7)GR ± BRNo key in ignition key cylinder
With keyWaveform 1
*2 IMI (E10±27) ±
E1 (E11±1)GR ± BRNo key in ignition key cylinder
With keyWaveform 1
*1 IMO (E10±29) ±
E1 (E12±7)W ± BRNo key in ignition key cylinder
With keyWaveform 2
*2 IMO (E10±26) ±
E1 (E11±1)W± BRNo key in ignition key cylinder
With keyWaveform 2
*1 E1 (E12±7) ±
Body groundBR ± Body groundConstantBelow 1

*2 E1 (E11±1)) ±
Body groundBR ± Body groundConstantBelow 1

B69241
GND
B69242
GND
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
05±1611
AVENSIS REPAIR MANUAL (RM1018E)
HINT:
*
1: 1CD±FTV engine
*
2: 1AZ±FSE engine
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Inspect using an oscilloscope.
Waveform 1 (Reference):
TerminalIMI ± GND
Tool Setting5 V/DIV., 50 ms/DIV.
ConditionIgnition switch ON
Waveform 2 (Reference):
TerminalIMO ± GND
Tool Setting5 V/DIV., 50 ms/DIV.
ConditionConstant

054CM±07
B65753
Transponder Key ECU Assy
ECM
Security Indicator
Transponder Key Amplifier
(Transponder Key Coil)
Unlock Warning Switch Assy
Transponder Key ECU Assy
Transponder Key Amplifier
(Transponder Key Coil)
Unlock Warning Switch Assy
ECM
Driver Side R/B Assy
Passenger Side R/B Assy
Center J/B
LHD Models
RHD Models 05±1606
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
LOCATION

054CI±07
±
DIAGNOSTICS ENGINE IMMOBILISER SYSTEM
05±1605
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
1. TRANSPONDER KEY ECU DTC CHART
DTC No.
(See Page)Detection ItemTrouble Area
*B2780
(05±1613)Push Switch/Key Unlock Warning Switch Malfunction

Unlock warning switch

Wire harness

Transponder key ECU assy
B2784
(05±1616)Antenna Coil Open/Short

Wire harness

Transponder key amplifier

Transponder key ECU assy
B2793
(05±1618)Transponder Chip Malfunction
Key
B2794
(05±1619)Unmatched Encryption Code
Key
B2795
(05±1620)Unmatched Key Code
Key
B2796
(05±1621)No Communication in Immobiliser System

Key

Transponder key amplifier

Wire harness

Transponder key ECU assy
B2797
(05±1624)Communication Malfunction No. 1

Key

Wire harness

Transponder key amplifier

Transponder key ECU assy
B2798
(05±1621)Communication Malfunction No. 2
Key
HINT:
*: Except for 1AZ±FE engine
2. ECM DTC CHART
NOTICE:
The DTC for the immobiliser system is specified. If the other codes are out\
put, check the DTC chart
of the engine control system.
DTC No.
(See Page)Detection ItemTrouble Area
B2799
(05±1625)Engine Immobiliser System Malfunction

Wire harness

Key

Transponder key ECU assy

Transponder key amplifier

ECM

05B0A±03
B50154
12 345 67 8
9 11121314 151610
DLC3 05±1602
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1. DIAGNOSIS SYSTEM
(a) Description
(1) The ECM controls the function of the immobiliser system on the vehicle.
Data of the immobiliser system and the Diagnostic Trouble Code (DTC) can be read in the Data
Link Connector 3 (DLC3) of the vehicle. When trouble occurs in the immobiliser system, even
though the security indicator lamp does not come on, DTCs can be checked.
Therefore, the immobiliser system seems to be malfunctioning, use the hand±held tester to
check for a malfunction and repair it.
(b) Inspect the DLC3.
The vehicle's ECM uses the ISO 9141±2 (Euro±
OBD)/ISO 14230 (M±OBD) communication protocol.
The terminal arrangement of the DLC3 complies with the
ISO 15031±3 and matches the ISO 9141±2/ISO 14230
format.
Standard:
Tester ConnectionConditionSpecified Condition
7 (Bus + line) ± 5 (Signal ground)During communicationPulse generation
4 (Chassis ground) ± Body groundAlwaysBelow 1

5 (Signal ground) ± Body groundAlwaysBelow 1

16 (B+) ± Body groundAlways10 to 14 V
HINT:
If the screen displays UNABLE TO CONNECT TO VEHICLE after you have connected the cable of the
hand±held tester to the DLC3, turned the ignition switch ON and used the hand±held tester, the problem
may be on the vehicle side or the tester side.

If communication is normal when the tester is connected to other vehicle, inspect the DLC3 of the origi-
nal vehicle.

If communication is still impossible when the tester is connected to another vehicle, the problem may
be in the tester itself, so consult the Service Department listed in the tester's instruction manual.
2. Using hand±held tester:
CHECK DTC
(a) Checking DTCs.
(1) Connect the hand±held tester to DLC3.
(2) Turn the ignition switch ON.
(3) Read DTCs by following the prompts on the tester screen.
HINT:
Refer to the hand±held tester operator's manual for further details.
(b) Clear the DTCs from memory.
(1) Connect the hand±held tester to DLC3.
(2) Turn the ignition switch ON.
(3) Erase DTCs by following the prompts on the tester screen.
HINT:
Refer to the hand±held tester operator's manual for further details.

± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
05±1603
AVENSIS REPAIR MANUAL (RM1018E)
3. CHECK DIAGNOSIS
(a) Using the hand±held tester, check for DTCs.
NOTICE:
Hand±held tester only:
When the diagnosis system is switched from normal mode to check mode, all the DTCs and freeze
frame data recorded in normal mode are erased. So before switching modes, always check the DTCs
and freeze frame data, and make a note of them.
(1) Prepare the hand±held tester.
(2) Connect the hand±held tester to the DLC3 under the instrument panel lower pad.
(3) Turn the ignition switch ON and push the hand±held tester switch ON.
(4) Use the hand±held tester to check for DTCs and freeze frame data, and make a note of them
(For operating instructions, see the hand±held tester instruction book).
(5) Confirm the details of the DTCs.
(b) Either of the following procedures will erase the DTCs and freeze frame data.
(1) Operating the hand±held tester to erase the codes (See the hand±held tester instruction book
for operating instructions).
(2) Disconnecting the battery terminals or ECU±B fuse.
4. DATA LIST
HINT:
Using the DATA LIST displayed on the hand±held tester, you can read the value of the switch, sensor, actua-
tor, etc. without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to short-
en the labor time.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Read the DATA LIST, according to the display on the tester.
Transponder key ECU:
ItemMeasurement Item/
Display (Range)Normal Condition
KEY SWUn±lock warning switch signal/
ON or OFFOFF: Key is in Ignition key cylinder
ON: No key is in Ignition key cylinder
IG SWIgnition switch signal/ ON or OFFOFF: Ignition switch is ON or START position
ON: Ignition switch is OFF or ON position
IMMOBILISERImmobiliser system status/
SET or UNSETUNSET: Without key
SET: Ignition switch ON
RESPONSETransponder chip data/
NG or OKNG: Data error
OK: Data OK
FRAMETransponder chip data/
NG or OKNG: Data error
OK: Data OK
SERIAL NUMBERTransponder chip data/
NG or OKNG: Data error
OK: Data OK
ENCRYPT CODETransponder chip data/
NG or OKNG: Data error
OK: Data OK
STATUSTransponder chip data/
NG or OKNG: Data error
OK: Data OK
BCCTransponder chip signal/
NG or OKNG: Incorrect data sending
OK: Correct data sending
SUB KEYSub key code signal/
NOMATCH or MATCHNOMATCH: Nomatch sub±key code is sent
MATCH: Sub key code is sent
MASTER KEYMaster key code signal/
NOMATCH or MATCHNOMATCH: Nomatch Master key code is sent
MATCH: Master key code is sent
REGIST SUB CODENumber of registered sub±key/ min. 0, max. 15Number of registered sub±key
REGIST MAS CODENumber of registered master key/ min. 0, max. 15Number of registered master key