Honda Ridgeline. Manual — part 504
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*02
SJC8A00J46636200000DAAT00
22-312
Immobilizer System
Component Location Index
PCM
TRANSPONDER
(Built into the ignition key)
IGNITION KEY
IMMOBILIZER CONTROL UNIT-RECEIVER
IMMOBILIZER INDICATOR
Replacement, page 11-205
Substitute known-good for testing,
page 11-8
Registration, page 22-324
Troubleshooting, page 22-316
Replacement, page 22-329
Input Test, page 22-327
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22-313
IMOES UNIT
(’07-08 Canada models)
IMOES UNIT
(’08 USA models)
Input Test/Replacement, page 22-326
Input Test/Replacement, page 22-325
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Immobilizer System
System Description
IMMOBILIZER CONTROL UNIT-RECEIVER
PCM
IGNITION KEY
(Has built-in transponder)
KEY CYLINDER
FUEL SUPPLY
SYSTEM
IMOES UNIT*
*: ’07-08 Canada models, ’08 USA models
IMMOBILIZER INDICATOR BLINKING PATTERN:
IGNITION SWITCH
PROGRAMMED
KEY INSERTED
WRONG KEY
INSERTED
INDICATOR
INDICATOR
ON
OFF
ON
OFF
2 sec
OFF
ON
5 sec
1 sec
1 sec
The vehicle is equipped with an immobilizer system that will disable the vehicle unless a programmed ignition key is
used.
This system consists of a transponder, an immobilizer control unit-receiver, immobilizer indicator, imoes unit (’07-08
Canada models, ’08 USA models), and the PCM.
’07 USA models: When the immobilizer key (programmed by the HDS) is inserted into the ignition switch and turned
to the ON (II) position, the immobilizer control unit-receiver sends power to the transponder in the ignition key. The
transponder then sends a coded signal back to the immobilizer control unit-receiver which then sends a coded signal
to the PCM to supply power to the fuel pump circuit.
’07-08 Canada models, ’08 USA models: When the immobilizer key is inserted into the ignition switch and turned to
the ON (II) position, the immobilizer control unit-receiver sends power to the transponder in the ignition key. The
transponder then sends a coded signal back to the immobilizer control unit-receiver which sends a coded signal to the
imoes unit, which confirms the code and signals the PCM to supply power to the fuel pump circuit. A handshake with
the HDS is required at PCM or imoes unit repair or replacement, and all keys are required at immobilizer control unit-
receiver repair or replacement.
• If a programmed key has been used, the immobilizer indicator will come on for about 2 seconds, then go off.
• If the wrong key has been used or the code was not received or recognized by the unit, the indicator will come on for
about 2 seconds, then it will blink until the ignition switch is turned OFF.
• If the ignition switch is turned OFF, the indicator will blink 5 seconds to signal that the unit has reset correctly, then
the indicator will go off.
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SJC8A00J46636200000EAAT00
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+
−
+
−
−
−
22-315
Circuit Diagram
G401
BLK
2
1
SWITCH
H BRK
IMOCD
LG1
DiagH
IMOLMP
B
IG1
C18
A19
B4
X35
X38
A6
G1
D6
(’07 08 Canada models, ’08 USA models)
IMOCD
LG1
KEY SW
MICU
RED/WHT
RED/WHT
4
1
2
3
5
BRN/YEL
RED/BLU
RED/WHT
RED/BLU
BRN/YEL
B
WHT/RED
BLK/GRN
IG1
IMOES UNIT
BLK/GRN
WHT/RED
BLK/YEL
BRN/YEL
LG1
A22
UNDER HOOD FUSE/RELAY BOX
B43
A44
BLK/GRN
No.19
(15 A)
WHT/RED
WHT/RED
IG1
BAT
IGNITION SWITCH
WHT
BLK/YEL
No.23 (IG) (50 A)
(7.5 A)
No.7
GRN/ORN
GRY
4
WHT/RED
7
5
BRN/YEL
LG2
YEL
IMOCD
G101
PCM
RED/BLU
6
3
1
2
IMMOBILIZER CONTROL UNIT
RECEIVER
KEY
BLU/ORN
No.15 (40 A)
No.22 (BAT) (120 A)
BATTERY
IG1 HOT in ON (II)
and START (III)
UNDER DASH
FUSE/RELAY
BOX
GAUGE
CONTROL
MODULE
DATA
LINK
CONNECTOR
(DLC)
PARKING
BRAKE
SWITCH
IGNITION
KEY
SWITCH
(Closed:
Key inserted)
IMMOBILIZER
INDICATOR
(LED)
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