TOYOTA RAV4 2006 Service Repair Manual

EI–30ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEM
EI
DESCRIPTION
This DTC is output when a key with an incomplete key code is inserted into the ignition key cylinder.
INSPECTION PROCEDURE
(a) Clear the DTC (see page EI-18).
(b) Reregister the key code with the transponder key ECU
(see page EI-5)
(c) Check that the engine starts with the key.
OK:
Engine starts.
NG
OK
DTC B2794 Unmatched Encryption Code
DTC No. DTC Detection Condition Trouble Area
B2794 Key with incomplete key code is inserted Key
1REREGISTER KEY
REPLACE KEY
END

ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEMEI–31
EI
DESCRIPTION
This DTC is output when a key code that has not been registered in the transponder key ECU is inserted
into the ignition key cylinder.
INSPECTION PROCEDURE
(a) Clear the DTC (see page EI-18).
(b) Reregister the key code with the transponder key ECU
(see page EI-5)
(c) Check that the engine starts with the key.
OK:
Engine starts.
NG
OK
DTC B2795 Unmatched Key Code
DTC No. DTC Detection Condition Trouble Area
B2795 Key with unregistered key code is inserted Key
1REREGISTER KEY
REPLACE KEY
END

EI–32ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEM
EI
DESCRIPTION
When a key is inserted into the ignition key cylinder but no communication occurs between the key and
transponder key ECU, DTC B2796 is output. When a key is inserted into the ignition key cylinder but a
communication error occurs between the key and transponder key ECU, DTC B2798 is output.
WIRING DIAGRAM
DTC B2796 No Communication in Immobiliser System
DTC B2798 Communication Malfunction No. 2
DTC No. DTC Detection Condition Trouble Area
B2796 No communication• Transponder key ECU
•Key
• Wire harness
• Transponder key amplifier
B2798 Communication error Key
B121682E05

ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEMEI–33
EI
INSPECTION PROCEDURE
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch ON with a key that cannot start
the engine.
(c) On the intelligent tester, enter the following menus:
DIAGNOSIS / OBD/MOBD / IMMOBILISER / DATA LIST
/ IMMOBILISER. Read the result.
Transponder key ECU:
OK:
UNSET (key is in ignition key cylinder) appears on
the screen.
OK
NG
(a) Check whether the engine starts with the vehicle's other
keys.
OK:
Engine starts.
NG
OK
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch ON with a key that cannot start
the engine.
(c) On the intelligent tester, enter the following menus:
DIAGNOSIS / OBD/MOBD / IMMOBILISER / DATA LIST
/ ANTENNA COIL. Read the result.
Transponder key ECU:
1READ VALUE OF INTELLIGENT TESTER (ENGINE IMMOBILISER SYSTEM)
ItemMeasurement Item / Display
(Range)Normal Condition Diagnostic Note
IMMOBILISERImmobiliser system status / SET
or UNSETSET: No key is in ignition key
cylinder
UNSET: Key is in ignition key
cylinder-
REPLACE TRANSPONDER KEY ECU
2CHECK WHETHER ENGINE STARTS WITH OTHER KEY
REREGISTER OR REPLACE KEY THAT
CANNOT START ENGINE
3READ VALUE OF INTELLIGENT TESTER (TRANSPONDER KEY COIL)
ItemMeasurement Item / Display
(Range)Normal Condition Diagnostic Note
ANTENNA COILTransponder key coil condition/
NORMAL or FAILNORMAL: Transponder key coil
is normal
FAIL: Transponder key coil is
malfunctioning-

EI–34ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEM
EI
OK:
NORMAL (Transponder key coil is normal) appears
on the screen.
OK
NG
(a) Disconnect the E46 ECU connector.
(b) Disconnect the E5 amplifier connector.
(c) Measure the resistance of the wire harness side
connectors.
Standard resistance
NG
OK
(a) Temporarily replace the transponder key amplifier with a
new or normally functioning one..
(b) Check that the engine starts normally.
OK:
Engine starts normally.
NG
OKREPLACE TRANSPONDER KEY ECU
4CHECK WIRE HARNESS (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)
B110403E14
Tester Connection Specified Condition
E46-14 (VC5) - E5-1 (VC5)
Below 1
E46-15 (CODE) - E5-4 (CODE)
E46-4 (TXCT) - E5-5 (TXCT)
E46-5 (AGND) - E5-7 (AGND)
E46-14 (VC5) or E5-1 (VC5) - Body
ground
10 k
or higher E46-15 (CODE) or E5-4 (CODE) -
Body ground
E46-4 (TXCT) or E5-5 (TXCT) - Body
ground
E46-5 (AGND) or E5-7 (AGND) - Body
ground
REPAIR OR REPLACE HARNESS AND
CONNECTOR
5CHECK TRANSPONDER KEY AMPLIFIER (OPERATION)
REPLACE TRANSPONDER KEY ECU
END (TRANSPONDER KEY AMPLIFIER IS DEFECTIVE)

ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEMEI–35
EI
DESCRIPTION
This DTC is output when a communication error occurs between the transponder key amplifier and
transponder key ECU. Some possible reasons for the communication error are: 1) 2 or more ignition keys
are positioned too close together, or 2) noise is occurring in the communication line.
WIRING DIAGRAM
DTC B2797 Communication Malfunction No. 1
DTC No. DTC Detection Condition Trouble Area
B2797Keys are positioned too close to each other,
or noise occurred in communication line•Key
• Wire harness
• Transponder key amplifier
• Transponder key ECU
B121683E07

EI–36ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEM
EI
INSPECTION PROCEDURE
(a) Check if the ignition key being used is near other ignition
keys. Also, check if the key ring is in contact with the key
grip.
Result:
B
A
(a) Separate the keys from each other and / or remove the
key ring.
(b) Clear the DTC (see page EI-18).
(c) Insert a key into the ignition key cylinder. Remove it.
Repeat for all other keys.
(d) Check that no DTC is output.
OK:
No DTC is output.
OK
NG
1CHECK KEY
B130077
Result Proceed to
Key is near other keys and/or key ring is in contact with key grip A
Key is not near other keys and/or key ring is not in contact with key
gripB
Go to step 3
2CHECK FOR DTC
END

ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEMEI–37
EI
(a) Using an oscilloscope or the intelligent tester, check for
noise in the waveform between the terminals of the E5
amplifier connector and E46 ECU connector.
OK:
No noise is present (see illustration).
NG
OK
3CHECK TRANSPONDER KEY ECU (NOISE)
B110405E05
Tester
ConnectionTool Setting Tool SettingSpecified
Condition
E46-15 (CODE) -
E5-4 (CODE)5 V/DIV., 20
msec./DIV.Key insertedNo noise is
present
FIND CAUSE OF NOISE AND REMOVE IT

EI–38ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEM
EI
(a) Disconnect the E46 ECU connector.
(b) Disconnect the E5 amplifier connector.
(c) Measure the resistance of the wire harness side
connectors.
Standard resistance
NG
OK
(a) Temporarily replacing the transponder key amplifier with
a new or normally functioning one.
(b) Check that the engine starts normally.
OK:
Engine starts.
NG
OK
4CHECK WIRE HARNESS (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)
B110403E17
Tester Connection Specified Condition
E46-15 (CODE) - E5-4 (CODE) Below 1
E46-15 (CODE) or E5-4 (CODE) -
Body ground10 k or higher
REPAIR OR REPLACE HARNESS AND
CONNECTOR
5CHECK TRANSPONDER KEY AMPLIFIER (OPERATION)
REPLACE TRANSPONDER KEY ECU
END (TRANSPONDER KEY AMPLIFIER IS DEFECTIVE)

ENGINE IMMOBILISER – ENGINE IMMOBILISER SYSTEMEI–39
EI
DESCRIPTION
This DTC is output when one of the following occurs: 1) the ECM detects errors in its own
communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; or
3) the ECU communication ID between the transponder key ECU and ECM is different and an engine
start is attempted. Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are
present. If present, troubleshoot the transponder key ECU DTCs first.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Delete the DTC (see page EI-18).
(b) Recheck for DTC.
OK:
B2799 output does not reoccur.
OK
NG
DTC B2799 Engine Immobiliser System Malfunction
DTC No. DTC Detection Condition Trouble Area
B2799One of following conditions is met:
• Error in communication between ECM
and transponder key ECU
• Error in communication lines
• Communication ID is different during
communication with transponder key
ECU• Wire harness
• Transponder key ECU
•ECM
1CHECK FOR DTC
B121684E04
NORMAL