DTC U201F:00 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c388800

DESCRIPTION

Communication error to keyless receiver

DETECTION CONDITION

•  Communication error between keyless control module and keyless receiver.

POSSIBLE CAUSE

•  Keyless receiver connector or terminals malfunction

•  Keyless control module connector or terminals malfunction

•  Short to ground in wiring harness between keyless receiver terminal C and keyless control module terminal 2H

•  Short to power supply in wiring harness between keyless receiver terminal C and keyless control module terminal 2H

•  Keyless receiver malfunction

•  Keyless control module malfunction

DESCRIPTION	Communication error to keyless receiver
DETECTION CONDITION	• Communication error between keyless control module and keyless receiver.
POSSIBLE CAUSE	• Keyless receiver connector or terminals malfunction • Keyless control module connector or terminals malfunction • Short to ground in wiring harness between keyless receiver terminal C and keyless control module terminal 2H • Short to power supply in wiring harness between keyless receiver terminal C and keyless control module terminal 2H • Keyless receiver malfunction • Keyless control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT KEYLESS RECEIVER CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the keyless receiver 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.
1		No	Go to the next step.
2	INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION • 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.
2		No	Go to the next step.
3	INSPECT COMMUNICATION CIRCUIT FOR SHORT TO GROUND • Keyless receiver and keyless control module connectors are disconnected. • Inspect for continuity between keyless receiver terminal C (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 6.
3		No	Go to the next step.
4	INSPECT COMMUNICATION CIRCUIT FOR SHORT TO POWER SUPPLY • Keyless receiver and keyless control module connectors are disconnected. • Reconnect the negative battery cable. • Switch the ignition to ON. • Measure the voltage at the keyless receiver terminal C (wiring harness-side). • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 6.
4		No	Go to the next step.
5	INSPECT KEYLESS RECEIVER • Inspect the keyless receiver. (See KEYLESS RECEIVER INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Is there any malfunction?	Yes	Replace the keyless receiver, then go to the next step. (See KEYLESS RECEIVER REMOVAL/INSTALLATION.)
5		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. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
6		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].)
7		No	DTC troubleshooting completed.