Acura RL (1996-2004 year). Manual — part 632
Control Unit Input Test
1. Remove the dashboard lower cover (see
).
2. Disconnect the 8P connector "A" from the immobilizer
control unit.
3. Inspect the connector and socket terminals to be
sure they are all making good contact.
• If the terminals are bent, loose, or corroded, repair
them as necessary, and recheck the system.
• If the terminals look OK, make the following
input tests at the connector.
If any test indicates a problem, find and
correct the cause, then recheck the system.
If all the input tests prove OK, check the immo-
bilizer receiver and transponder.
IMMOBILIZER CONTROL UNIT
Wire side of
female terminals
Cavity Wire Test condition Test: Desired results Possible cause if result is not obtained
YEL/BLK
GRY
WHT/RED
YEL/BLK
PNK
WHT
BLK
Under all conditions
Shift lever in
Ignition switch at
START (III)
Ignition switch ON (II)
Under all conditions
Under all conditions
Under all conditions
Check for voltage to ground:
There should be battery voltage.
Check for continuity to ground:
There should be continuity.
Check for voltage to ground:
There should be battery voltage.
Check for voltage to ground:
There should be battery voltage.
Attach to ground:
The immobilizer indicator light
should come on.
*Check for continuity between the
A6 terminal and PCM 12P
connector No. 11 terminal.
There should be continuity.
Check for continuity to ground:
There should be continuity.
• Poor ground (G401, G402 or G251)
• An open in the wire
• An open in the wire
• Blown No. 56 (7.5 A) fuse in the
under-hood fuse/relay box
• Blown bulb
• Faulty gauge circuit
• An open in the wire
• Blown No. 6 (20 A) fuse in the
under-dash fuse/relay box
• Blown No. 25 (30 A) fuse in the
under-dash fuse/relay box
• Faulty PGM-FI main relay
• An open in the wire
• Poor ground (G101)
• Faulty starter cut relay
• An open in the wire
• Faulty transmission range switch
• An open in the wire
• Blown No. 6 (20 A) fuse in the
under-dash fuse/relay box.
• An open in the wire
CONNECTOR "A"
*: Use the backprobing method explained in
Main Menu
Table of Contents
Immobilizer System
Immobilizer Receiver and Transponder (Key) Test
IMMOBILIZER
CONTROL
UNIT
Does the immobilizer indi-
cator blink?
Perform the control unit input
test.
YES
Try to start the engine with another
master key or valet key from this
vehicle.
Does the engine start?
Replace the transponder (igni-
tion key).
3P CONNECTOR
NO
Does the engine crank?
NO
Rewrite the immobilizer control
unit and the PCM with the PGM
Tester.
Check for an open in the WHT
wire between the immobilizer
control unit and the PCM. If the
wire is OK, rewrite the PCM with
the PGM Tester.
Does the engine start?
Immobilizer system is OK now.
Wire side of
female terminals
Is there continuity?
NO
Short in the shielded wires
between the immobilizer receiver
and the immobilizer control unit.
Replace the wire harness.
Measure resistance between the
B1 and B3 terminals of the 3P con-
nector.
Is there about 15 ohms?
YES
Faulty receiver or open in the
shielded wires between the immo-
bilizer receiver and immobilizer
control unit.
Replace the immobilizer control
unit.
1. Turn the ignition switch ON (II).
2. Check that the immobilizer
indicator light starts blinking
after two seconds.
1. Turn the ignition switch OFF.
2. Disconnect the 3P connector
"B" from the immobilizer con-
trol unit.
3. Check for continuity between
the B1 and B2, and the B3 and
B2 terminals of the 3P connec-
tor.
NO
YES
YES
NO
NO
YES
YES
Main Menu
Table of Contents
Immobilizer Receiver Replacement
1. Remove the dashboard lower cover (see
).
2. Disconnect the ignition key light socket from the
ignition key light ring by turning the socket.
IGNITION
KEY SWITCH
IGNITION KEY LIGHT
and SOCKET
9. Turn the ignition key to 0, and remove it.
IMMOBILIZER RECEIVER
10. Turn the immobilizer receiver clockwise, and
remove it.
Installation:
1. Install the new immobilizer receiver in the reverse
order of removal.
2. Insert the ignition key into the key cylinder, and turn
it to "I".
3. Insert the key cylinder into the key cylinder housing
with pushing the lock pin.
NOTE: The lock pin can be pushed by pulling the
key in position "I".
4. The remaining installation is the reverse of the
removal procedure.
NOTE: This harness is shielded and serves as a
communication link; be careful not to damage it.
7. Turn the ignition key to "I".
8. Push the lock pin, and remove the key cylinder by
pulling the ignition key.
NOTE: Don't pull on the immobilizer receiver.
3. Loosen the screw, then remove the ignition key
light ring.
4. Disconnect the immobilizer receiver 3P connector.
5. Remove the screw and the ignition key switch.
6. Remove the screw from the key cylinder housing.
IMMOBILIZER RECEIVER
3P CONNECTOR
IGNITION KEY
LIGHT RING
KEY CYLINDER
HOUSING
PUSH
LOCK PIN
KEY POSITION
KEY CYLINDER
Main Menu
Table of Contents
Driving Position Memory System (DPMS)
Component Location Index
VEHICLE SPEED SENSOR (VSS)
Troubleshooting, page
Power Mirror Position Sensor Test,
(refer to flowchart No. 10)
DRIVING POSITION
MEMORY SWITCH
Test, page
POWER MIRROR CONTROL UNIT
Input Test, page
FRONT UP-DOWN
POSITION SENSOR
Test, page
DRIVER'S POWER SEAT
REAR UP-DOWN POSITION SENSOR
Test, page
RECLINE POSITION SENSOR
Test, page
POWER SEAT ADJUSTMENT SWITCH
Test, page
POWER SEAT CONTROL UNIT
Input Test, page
SLIDE POSITION SENSOR
Test, page
FRONT UP-DOWN MOTOR
Main Menu
Table of Contents
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