Acura RSX Honda Integra. Manual — part 460
05
06
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YES
NO
YES
NO
YES
NO
YES
NO
22-180
Immobilizer System
Troubleshooting (cont’d)
IMMOBILIZER CONTROL-UNIT
RECEIVER 7P CONNECTOR
IMMOBILIZER CONTROL-UNIT
RECEIVER 7P CONNECTOR
BRN/YEL
18. Turn the ignition switch OFF.
19. Disconnect the 7P connector from the immobilizer
control unit-receiver.
20. Disconnect the ECM/PCM connector E (31P).
21. Attach the ECM/PCM connector E (31P) No. 7
terminal to body ground with a jumper wire.
22. Turn the ignition switch ON (II).
23. Check for voltage between the immobilizer control
unit-receiver 7P connector No. 6 (IG1) terminal and
body ground.
Go to step 24.
Check for these problems:
• Blown No. 6 (15 A) (’02-04 models) or No. 6 (20 A)
(’05-06 models) fuse in the under-hood fuse/relay
box.
• Blown No. 32 (15 A) fuse in the auxiliary under-
dash fuse/relay box (’05-06 models).
• Faulty PGM-FI main relay 1.
• An open in the wire between the immobilizer-
control unit-receiver and under-hood fuse/relay
box.
24. Turn the ignition switch OFF.
25. Check for continuity between the immobilizer
control unit-receiver 7P connector No. 1 (LG3)
terminal and body ground.
Substitute a known-good immobilizer control
unit-receiver and/or ECM/PCM.
Repair an open in the wire. If the wire is OK,
repair G101.
26. Turn the ignition switch OFF.
27. Connect the HDS to the data link connector.
28. Turn the ignition switch ON (II).
29. Look at the System Check in the Immobilizer Info
with the HDS (see page 22-182).
Go back to step 1.
Go to step 30.
30. Verify the System Check display on the HDS.
Go to step 31.
Go to step 35.
Wire side of female terminals
Wire side of female terminals
Is ther e batter y voltage?
Is ther e continuity?
Is the immobilizer system nor mal?
Does the HDS display the inf or mation?
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01
*01
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YES
NO
YES
NO
YES
NO
22-181
RED/BLU
IMMOBILIZER CONTROL-UNIT
RECEIVER 7P CONNECTOR
RED/BLU
IMMOBILIZER CONTROL-UNIT
RECEIVER 7P CONNECTOR
ECM/PCM CONNECTOR E (31P)
RED/BLU
31. Turn the ignition switch OFF.
32. Disconnect the 7P connector from the immobilizer
control unit-receiver.
33. Disconnect the 31P E connector from the ECM/PCM.
34. Check for continuity between the immobilizer
control unit-receiver 7P connector No. 2 (IMOCD)
terminal and body ground.
Repair a short in the wire.
Substitute a known-good immobilizer control
unit-receiver and/or ECM/PCM.
35. Verify the System Check display on the HDS.
Go to step 36.
Check the Possible Failures shown on the
System Check display (see page 22-182).
36. Turn the ignition switch OFF.
37. Disconnect the 7P connector from the immobilizer
control unit-receiver.
38. Disconnect the 31P E connector from the ECM/PCM.
39. Check for continuity between the immobilizer
control unit-receiver 7P connector No. 2 (IMOCD)
terminal and ECM/PCM connector E (31P) No. 27
terminal.
Substitute a known-good immobilizer control
unit-receiver and/or ECM/PCM.
Repair an open in the wire.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Does the HDS display the inf or mation?
Is ther e continuity?
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Status Log No.
System Check
Possible Failures
22-182
Immobilizer System
System Check
1. Connect the HDS to the data link connector.
2. Turn the ignition switch ON (II).
3. Monitor the System Check in the Immobilizer Info with the HDS.
4. If the HDS displays the ‘‘Immobilizer system is normal’’, the immobilizer system is OK. If the HDS displays any other messages, check as
follows:
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A-1
Immobilizer system
is not normal
This key is not registered in the immobilizer unit. Try to register keys by using ‘‘KEYS’’.
The communication was not good between the antenna and the immobilizer key by
influence of metal such as key chains.
The communication was not good between the antenna and the immobilizer key by
battery voltage low.
A-2
Immobilizer system
is not normal
Intermittent interruption between transponder and immobilizer unit.
The immobilizer key type is different. It is not for this vehicle but for another one or for
other company’s one.
Key failure (transponder failure)
The communication was not good between the antenna and the immobilizer key by
influence of metal such as key chains.
The communication was not good between the antenna and the immobilizer key by
battery voltage low.
A-3
Immobilizer system
is not normal
The ignition switch was turned on with a non-immobilizer key.
The immobilizer key type is different. It is not for this vehicle but for another one or for
other company’s one.
Key failure (transponder failure)
The communication was not good between the antenna and the immobilizer key by
influence of metal such as key chains.
The communication was not good between the antenna and the immobilizer key by
battery voltage low.
Immobilizer unit failure
B-1
Immobilizer system
is not normal
The ECM/PCM was not registered. Try to register the ECM/PCM by using ‘‘REPLACE
ECM/PCM’’.
The communication was not good between the ECM/PCM and the immobilizer unit by
battery voltage low.
The communication was not good between the immobilizer unit and the ECM/PCM by
influence of some noise.
B-2
Immobilizer system
is not normal
The ECM/PCM was not registered. Try to register the ECM/PCM by using ‘‘REPLACE
ECM/PCM’’.
The communication was not good between the ECM/PCM and the immobilizer unit by
battery voltage low.
The communication was not good between the immobilizer unit and the ECM/PCM by
influence of some noise.
D-1
Immobilizer system
is not normal
Harness short from the ECM/PCM to the immobilizer unit. (S-net line short)
The communication was not good between the ECM/PCM and the immobilizer unit by
battery voltage low.
The communication was not good between the immobilizer unit and the ECM/PCM by
influence of some noise.
Immobilizer unit failure
ECM/PCM failure
D-3
Immobilizer system
is not normal
Blown fuse
Harness open from the ECM/PCM to the immobilizer unit.
The communication was not good between the ECM/PCM and the immobilizer unit by
battery voltage low.
The communication was not good between the immobilizer unit and the ECM/PCM by
influence of some noise.
Immobilizer unit failure
ECM/PCM failure
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Status Log No.
Detected Item
Probable Cause
22-183
Status Log
If you suspect there is a immobilizer system problem, check the status log.
NOTE: Status log may not be available for all models. If you have an updated immobilizer control unit-receiver
(’02-04 models) or a ’05-06 models, status log should be available.
1. Connect the HDS to the data link connector.
2. Turn the ignition switch ON (II).
3. On the HDS screen, select Honda systems, select immobilizer set-up, select immobilizer information, then select
status log.
4. Check the Status log count. Troubleshoot the status with the highest count first. If no counts are listed, the
immobilizer system is OK. Continue with normal symptom troubleshooting.
A-1
KEY CODE MISMATCH
(Code format normal, but code
data is mismatch)
1.
2.
3.
The key was not registered
Interference from metal such as key chains
Low battery voltage
A-2
KEY CODE MISMATCH
(Code format failure)
1.
Ignition switch was turned on with another
type of immobilizer key or aftermarket key
2.
3.
Interference from metal such as key chains
Low battery voltage
A-3
KEY CODE MISMATCH
(No key code or non-immobilizer
key)
1.
Ignition switch was turned on with another
type of immobilizer key or aftermarket key
2.
3.
4.
5.
Interference from metal such as key chains
Low battery voltage
Key failure
Immobilizer control unit-receiver failure
B-1
ECM/PCM CODE MISMATCH
(Code format normal, but code
data is mismatch)
1.
2.
3.
ECM/PCM was not registered correctly
Low battery voltage
Poor or loose terminal connections at the
immobilizer control unit-receiver
4.
Communication line electrical noise
B-2
ECM/PCM MISMATCH
(Code format failure)
1.
2.
3.
ECM/PCM was not registered correctly
Low battery voltage
Poor or loose terminal connections at the
immobilizer control unit-receiver
4.
Communication line electrical noise
D-1
SECURITY-NET LINE PROBLEM
(Short to ground)
1.
2.
Low battery voltage
Poor or loose terminal connections at the
immobilizer control unit-receiver and the ECM/
PCM
3.
Communication line electrical noise
D-3
SECURITY-NET LINE PROBLEM
(Open line or ECM/PCM failure)
1.
Open or short in the harness from the ECM/
PCM to the immobilizer control unit-receiver
2
3
Low battery voltage
Poor or loose terminal connections at the
immobilizer control unit-receiver and the ECM/
PCM
4
Communication line electrical noise
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