DTC U3004:16 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c399200

DESCRIPTION

Low voltage in ACC monitor input circuit
DETECTION CONDITION
•  ACC monitor is off for 1 s when the ignition switch is ACC.
POSSIBLE CAUSE
•  Relay block connector or terminals malfunction
•  Keyless control module connector or terminals malfunction
•  Open circuit or short to ground in ACC monitor input circuit
―  Short to ground in wiring harness between relay block terminal 2B and keyless control module terminal 2C
―  MIRROR 10 A fuse malfunction
―  Open circuit in wiring harness between relay block terminal 2B and keyless control module terminal 2C
•  Relay block malfunction
•  Keyless control module malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY RELATED STORED DTC
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the DTC U3004:11 also present?
Yes
Go to the applicable DTC inspection.
(See DTC U3004:11 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
Go to the next step.
2
INSPECT RELAY BLOCK CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the relay block connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
3
INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS
•  Disconnect the keyless control module connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
4
INSPECT ACC MONITOR INPUT CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Relay block and keyless control module connectors are disconnected.
•  Reconnect the relay block connector.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the following terminal (wiring harness-side):
―  Keyless control module terminal 2C
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the MIRROR 10 A fuse.
•  If the fuse is melt:
―  Repair or replace the wiring harness for a possible short to ground.
―  Replace the fuse.
•  If the fuse is deterioration:
―  Replace the fuse.
•  If the fuse is normal:
―  Repair or replace the wiring harness for a possible open circuit.
Go to Step 6.
5
INSPECT RELAY BLOCK
•  Switch the ignition to off.
•  Inspect the relay block.
•  Is there any malfunction?
Yes
Replace the relay block, then go to the next step.
(See RELAY BLOCK REMOVAL/INSTALLATION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
Go to the next step.
6
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC from the keyless control module using the M-MDS.
•  Switch the ignition to ACC.
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the DTC U3004:16 present?
Yes
Replace the keyless control module, then go to the next step.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
DTC troubleshooting completed.