2006 ACURA CSX keyless



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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.
ThesystemisOK,gotostep3.
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. (cont’d)
Wire side of female terminals
Terminal side of male terminals
Doestheenginestart? Do al l d oor sw i t ches i nd i cat e OF F ? Is there battery voltage?
Is there continuity?
08/08/21 14:26:03 61SNR030_220_0129
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DYNOMITE -2009-



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YES
NO
YES
NO YES
NO
22-128Keyless/Power Door Locks/Security System
Symptom Troubleshooting (cont’d)
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 continuitybetween 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 terminalsWire side of female terminals Wire side of female terminals
Is there continuity?
Is there continuity? Is there continuity?
08/08/21 14:26:04 61SNR030_220_0130
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DYNOMITE -2009-

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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
22-12922-129
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 t he d oor l ock act uat or s w or k nor mal l y ?
Does t he k ey -i n r emi nd er chi me sound ?
Is the transmitter OK ? Does t he hor n sound ?
Does t he hor n sound ?Do t he head l i ght s come on?Is the transmitter OK ?
08/08/21 14:26:04 61SNR030_220_0131
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DYNOMITE -2009-

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Doors automatically relock 30, 60, or 90
seconds after being unlocked with the
transmitter even though a door has been
opened
YES
NO
YES
NO
22-13022-130 Keyless/Power Door Locks/Security System
Symptom Troubleshooting (cont’d) Tripped Sensor History
1. Turn the ceiling light switch in DOOR position.
2. Turn the ignition switch to ON (II).
3. Close all doors.
4. Watch the ceiling light and the
door indicator on
the gauge control module.
Go to step 5.
Repair a short to ground in the wire between
the MICU and door switch.
5. Open and close each door one at a time.
6. Watch the ceiling light and the door indicator on
the gauge control module.
Substitute a known-good MICU and recheck.
If the symptom goes away, replace the original
MICU (see page 22-66).
Repair an open in the wire between the MICU
and the door switch. If the wire is OK, faulty the
door switch, replace the door lock actuator
assembly. The security system stores information on the last
tripped sensor if the security system has been violated.
The information can be retrieved using the HDS.
To retrieve the last tripped sensor data:
1. Select HISTORY DATA from the security system test mode menu.
2. Select CURRENT DATA.
3. Confirm that the VIN matches the Vehicle then press the enter button.
4. Scroll through the data list.  Sensors that were violated will indicate DETECT.
 Sensors that were not violated will indicateNONE.
5. Inspect the DETECT circuit for:  Misadjusted or damaged switch.
 Loose or corroded connections.
 Intermittent short to ground.
Do the ceiling light and door indicator go of f ?
Do the ceiling light and door indicator come onw hen t he d oor i s open, and go of f w hen t he d oor i sclosed?
08/08/21 14:26:04 61SNR030_220_0132
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DYNOMITE -2009-

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Doors automatically relock 30, 60, or 90
seconds after being unlocked with the
transmitter even though a door has been
opened
YES
NO
YES
NO
22-13022-130 Keyless/Power Door Locks/Security System
Symptom Troubleshooting (cont’d) Tripped Sensor History
1. Turn the ceiling light switch in DOOR position.
2. Turn the ignition switch to ON (II).
3. Close all doors.
4. Watch the ceiling light and the
door indicator on
the gauge control module.
Go to step 5.
Repair a short to ground in the wire between
the MICU and door switch.
5. Open and close each door one at a time.
6. Watch the ceiling light and the door indicator on
the gauge control module.
Substitute a known-good MICU and recheck.
If the symptom goes away, replace the original
MICU (see page 22-66).
Repair an open in the wire between the MICU
and the door switch. If the wire is OK, faulty the
door switch, replace the door lock actuator
assembly. The security system stores information on the last
tripped sensor if the security system has been violated.
The information can be retrieved using the HDS.
To retrieve the last tripped sensor data:
1. Select HISTORY DATA from the security system test mode menu.
2. Select CURRENT DATA.
3. Confirm that the VIN matches the Vehicle then press the enter button.
4. Scroll through the data list.  Sensors that were violated will indicate DETECT.
 Sensors that were not violated will indicateNONE.
5. Inspect the DETECT circuit for:  Misadjusted or damaged switch.
 Loose or corroded connections.
 Intermittent short to ground.
Do the ceiling light and door indicator go of f ?
Do the ceiling light and door indicator come onw hen t he d oor i s open, and go of f w hen t he d oor i sclosed?
08/08/21 14:26:04 61SNR030_220_0132
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DYNOMITE -2009-


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22-131
MICU Input Test
UNDER-DASH FUSE/RELAY BOX CONNECTOR E (42P)
YEL GRY LT GRNBLK
BRNBLU
WHT WHT
UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P)
UNDER-DASH FUSE/RELAY BOX CONNECTOR G (21P) YEL
LT GRN BLK
BLK BLU
BLU GRN
LT BLU GRN
GRN
1. Before troubleshooting the keyless/power door locks/security system, troubleshoot the system using B-CAN System Diagnosis Test Mode A (see page 22-93).
2. Check the No. 10 (7.5 A) and No. 25 (20 A) fuses in the under-dash fuse/relay box. If any fuse is blown, replace it andgotostep3.
3. Disconnect under-dash fuse/relay box connectors E, F, G, M, N, Q, R, and T. NOTE: All connector views are shown from wire side of female terminals.
(cont’d)
08/08/21 14:26:04 61SNR030_220_0133
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22-132Keyless/Power Door Locks/Security System
MICU Input Test (cont’d)
YEL
BLU UNDER-DASH FUSE/RELAY BOX
CONNECTOR N (14P)
PNK BLU YEL
UNDER-DASH FUSE/RELAY BOX
CONNECTOR M (10P)
GRN
UNDER-DASH FUSE/RELAY BOX
CONNECTOR T (34P)
LT BLU BLK
ORN
BRN
YEL
PUR
GRN
WHT
LT GRN PNKGRY
GRY
UNDER-DASH FUSE/RELAY BOX
CONNECTORR(20P)
UNDER-DASH FUSE/RELAY BOX
CONNECTOR Q (16P)
4. 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.
 IftheterminalslookOK,gotostep5.
08/08/21 14:26:04 61SNR030_220_0134
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Cavity Wire Test conditionTest: Desired result Possible cause if desired result is
not obtained
22-134Keyless/Power Door Locks/Security System
MICU Input Test (cont’d)
6. Reconnect the connectors to the under-dash fuse/relay box, and do these input tests at the following connectors.
 If any test indicates a problem, find and correct the cause, then recheck the system.
 If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box.







































E6 BLK Under all
conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G602)
An open in the wire
E33 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G601)
An open in the wire
F20 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G401)
An open in the wire
T34 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G501)
An open in the wire
E2 GRY Right rear door open Measure the voltage to ground:
There should be less than 1 V. Faulty right rear door switch
An open in the wire
Right rear door
closed Measure the voltage to ground:
There should be more than 5 V. Faulty right rear door switch
A short to ground in the wire
E3 LT GRNFront passenger’s
door open Measure the voltage to ground:
There should be less than 1 V. Faulty front passenger’s door
switch
An open in the wire
Front passenger’s
door closed Measure the voltage to ground:
There should be more than 5 V. Faulty front passenger’s door
switch
A short to ground in the wire
E17 BRN Left rear door open Measure the voltage to ground: There should be less than 1 V.Faulty left rear door switch
A short to ground in the wire
Left rear door
closed Measure the voltage to ground:
There should be more than 5 V. Faulty left rear door switch
A short to ground in the wire
E36 BLU Trunk lid open Measure the voltage to ground: There should be less than 1 V.Poor ground (G701)
Faulty trunk lid latch switch
An open in the wire
Trunk lid closed Measure the voltage to ground: There should be more than 5 V. Faulty trunk lid latch switch
A short to ground in the wire
E37 GRN Driver’s door open Measure the voltage to ground: There should be less than 1 V.Faulty driver’s door switch
An open in the wire
Driver’s door
closed Measure the voltage to ground:
There should be more than 5 V. Faulty driver’s door switch
A short to ground in the wire
F27 GRN Transmission range switch in P Measure the voltage to ground:
There should be less than 1 V. Poor ground (G101)
Faulty transmission range
switch
An open in the wire
Transmission
range switch in
any other position
than P Measure the voltage to ground:
There should be more than 5 V.
Faulty transmission range
switch
A short to ground in the wire
G13 LT BLUHood open Measure the voltage to ground:
There should be less than 1 V. Poor ground (G401)
Faulty hood switch
An open in the wire
Hood closed Measure the voltage to ground: There should be more than 5 V. Faulty hood switch
A short to ground in the wire
08/08/21 14:26:05 61SNR030_220_0136
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DYNOMITE -2009-