Acura CSX. Manual — part 519
SNR9A00J46643400000FAAT50
Power Door Locks/Keyless
No.
Symptom
Check Items
22-126
Keyless/Power Door Locks/Security System
Symptom Troubleshooting
1. If the door lock system works properly, but the keyless operation does not, refer to the immobilizer-keyless control
unit symptom troubleshooting information (see page 22-321).
NOTE: The door lock system does not function when:
• Any of the doors is open.
• Ignition key is in the ignition key switch.
• Ignition switch is ON (II).
•
•
•
•
•
•
•
•
•
•
1
The doors will not lock or unlock.
MICU input test (see page 22-131).
Driver’s door key cylinder switch test (see page 22-140).
Door lock switch test (see page 22-139).
Door lock knob switch test (see page 22-138).
2
The doors will not lock.
MICU input test (see page 22-131).
Door lock knob switch test (see page 22-138).
Driver’s door switch test (check the door switch ON/OFF
information with the HDS).
3
The doors will not unlock.
MICU input test (see page 22-131).
Door lock knob switch test (see page 22-138).
Door switch test (check the door switch ON/OFF
information with the HDS).
4
Keyless operation does not work
(LOCK, UNLOCK, PANIC).
Symptom troubleshooting (see page 22-127).
5
Doors will not unlock with the
transmitter, but will unlock with the
door switch.
Symptom troubleshooting (see page 22-129).
6
Doors will not lock with the transmitter,
but will lock with the door switch.
Symptom troubleshooting (see page 22-129).
7
Doors automatically relock after being
unlocked with the transmitter even
though a door has been opened.
Symptom troubleshooting (see page 22-130).
8
The horn does not sound when PANIC
button on the transmitter pressed.
Symptom troubleshooting (see page 22-129).
9
Keyless operation will work even
though the ignition key is in the
ignition switch.
Ignition key switch test (see page 22-207).
: If only one door is not working properly, check that door’s lock actuator first, then check the other items listed
in this table.
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01
02
SNR9A00J46643400000FAAT00
−
−
−
−
−
−
−
−
Keyless operation does not work (LOCK,
UNLOCK, PANIC)
YES
NO
YES
NO
YES
NO
YES
NO
22-127
IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR
VBU (WHT)
IGNITION KEY SWITCH 6P CONNECTOR
GND
IG KEY SW
NOTE:
• Before troubleshooting, check the B-CAN DTCs. If any
DTC is indicated, troubleshoot the indicated DTC first.
• Before troubleshooting, do the keyless transmitter
test (see page 22-142).
1. Turn the ignition switch to ON (II).
2. Try to start the engine.
The system is OK, go to step 3.
Go to the immobilizer symptom
troubleshooting (see page 22-323).
3. Turn the ignition switch to LOCK (0).
4. Connect the HDS to the data link connector.
5. Close all doors, then turn the ignition switch to ON
(II).
6. Enter the BODY ELECTRICAL menu, and check the
door switch parameters.
Go to step 7.
Faulty door switch, or shorted door switch
wire. Repair as necessary.
7. Remove the ignition key from the ignition switch.
8. Disconnect the immobilizer-keyless control unit 7P
connector.
9. Measure the voltage between immobilizer-keyless
control unit 7P connector terminal No. 1 and body
ground.
Go to step 10.
Check the fuse No. 23 (10 A) in the under-
hood fuse/relay box. If the fuse is blown, replace
the fuse and repair a short to ground in the wire. If
the fuse is OK, repair an open in the wire.
10. Disconnect the ignition key switch 6P connector.
11. At the ignition key switch side, check for continuity
between ignition key switch 6P connector terminals
No. 1 and No. 2.
Faulty ignition key switch or short to ground,
replace the steering lock assembly (see page 17-14).
Go to step 12.
Wire side of female terminals
Terminal side of male terminals
Does the engine star t?
Do all door switches indicate OF F ?
Is ther e batter y voltage?
Is ther e continuity?
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03
04
05
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
22-128
Keyless/Power Door Locks/Security System
IGNITION KEY SWITCH 6P CONNECTOR
GND
IG KEY SW
IGNITION KEY SWITCH 6P CONNECTOR
IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR
IG KEY SW (PNK)
IG KEY SW (PNK)
IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR
IG KEY SW (PNK)
12. Insert the ignition key into the ignition switch.
13. At the ignition key switch side, check for continuity
between ignition key switch 6P connector terminals
No. 1 and No. 2.
Go to step 14.
Faulty ignition key switch, replace the
steering lock assembly (see page 17-14).
14. Check for continuity between immobilizer-keyless
control unit 7P connector terminal No. 6 and
ignition key switch 6P connector terminal No. 1.
Go to step 15.
Repair an open in the wire.
15. Check for continuity between immobilizer-keyless
control unit 7P connector terminal No. 6 and body
ground.
Repair a short to ground in the wire.
Replace the immobilizer-keyless control unit
(see page 22-332).
Terminal side of male terminals
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is ther e continuity?
Is ther e continuity?
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SNR9A00J46643400000FAAT01
SNR9A00J46643400000FAAT02
−
−
−
−
−
−
−
−
−
−
−
−
−
−
Doors will not unlock (or lock) with the
transmitter, but will unlock (lock) with the
door switch
The horn does not sound and/or the
headlights do not flash when the PANIC
button on the transmitter is pressed
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
22-129
22-129
NOTE: Before troubleshooting, check the B-CAN DTCs.
If any DTC is indicated, troubleshoot the indicated DTC
first.
1. Turn the ignition switch to LOCK (0).
2. Remove the ignition key from the ignition switch.
3. Close and lock the doors.
4. Try to lock/unlock the doors with the keyless
transmitter.
Intermittent failure. The system is OK at this
time.
Go to step 5.
5. Open the driver’s door.
Faulty ignition key switch, or short to ground
on the ignition switch PNK wire. Repair as
necessary.
Go to step 6.
6. Do the transmitter test (see page 22-142).
Substitute a known-good MICU and
recheck.
Replace the transmitter (see page 22-142).
NOTE: Before troubleshooting, check the B-CAN DTCs.
If any DTC is indicated, troubleshoot the indicated DTC
first.
1. Press the PANIC button.
Go to step 3.
Go to step 2.
2. Press the horn button.
Go to step 3.
Check the horn circuit.
3. Turn the headlight switch ON.
Go to step 4.
Check the lighting circuit.
4. Do the transmitter test (see page 22-142).
Substitute a known-good MICU and
recheck.
Replace the transmitter (see page 22-142).
Do the door lock actuator s wor k nor mally?
Does the key-in r eminder chime sound?
Is the tr ansmitter OK ?
Does the hor n sound?
Does the hor n sound?
Do the headlights come on?
Is the tr ansmitter OK ?
08/08/21 14:26:04 61SNR030_220_0131
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