DTC U0127:00

id020200801300

With Advanced Keyless Entry And Push Button Start System

DTC U0127:00	•  Communication failure between instrument cluster and keyless receiver
DETECTION CONDITION	•  The instrument cluster cannot receive signal from the keyless CM.
POSSIBLE CAUSE	•  Open or short circuit in the wiring harness between the keyless CM terminal 2F and the instrument cluster terminal 2N. •  Keyless control module malfunction. •  Instrument cluster malfunction. •  Poor connection at connectors (female terminal) •  BCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT WHEEL UNIT SIGNAL FOR OPEN CIRCUIT •  Switch the ignition to off. •  Disconnect keyless CM, instrument cluster and BCM connectors. •  Inspect for continuity between keyless CM terminal 2F (harness-side) and instrument cluster terminal 2N (harness-side). •  Inspect for continuity between keyless CM terminal 2F (harness-side) and BCM terminal 6J (harness-side). •  Is there continuity?	Yes	Go to the next step.
		No	Repair or replace the following wiring harness for an open circuit, then go to Step 5. ―  Between keyless CM terminal 2F and instrument cluster terminal 2N ―  Between keyless CM terminal 2F and BCM terminal 6J
2	INSPECT WHEEL UNIT SIGNAL FOR SHORT TO POWER •  Switch the ignition to off. •  Disconnect keyless CM, instrument cluster and BCM connectors. •  Measure the voltage between keyless CM terminal 2F (harness-side) and ground. •  Is there B+?	Yes	Repair or replace the following wiring harness for a short to power, then go to Step 5. ―  Between keyless CM terminal 2F and instrument cluster terminal 2N ―  Between keyless CM terminal 2F and BCM terminal 6J
		No	Go to the next step.
3	INSPECT WHEEL UNIT SIGNAL FOR SHORT TO GROUND •  Switch the ignition to off. •  Disconnect keyless CM, instrument cluster and BCM connectors. •  Inspect for continuity between keyless CM terminal 2F (harness-side) and ground. •  Is there continuity?	Yes	Repair or replace the following wiring harness for a short to ground, then go to Step 5. ―  Between keyless CM terminal 2F and instrument cluster terminal 2N ―  Between keyless CM terminal 2F and BCM terminal 6J
		No	Go to the next step.
4	INSPECT FOR KEYLESS CM MALFUNCTION •  Switch the ignition to off. •  Using the M-MDS, perform the DTC inspection for the keyless CM. •  Is any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
		No	Go to the next step.
5	INSPECT FOR BCM MALFUNCTION •  Switch the ignition to off. •  Using the M-MDS, perform the DTC inspection for the BCM. •  Is any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [BCM].)
		No	Go to the next step.
6	VERIFY TROUBLESHOOTING COMPLETED •  Clear the DTC from the memory. (See TIRE PRESSURE MONITORING SYSTEM (TPMS) ON-BOARD DIAGNOSIS.) •  Switch the ignition to ON and wait for 30 s. •  Is the same DTC present?	Yes	•  If the malfunction recurs, replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) •  Configure the instrument cluster. (See INSTRUMENT CLUSTER CONFIGURATION.) •  Register the wheel unit ID. (See WHEEL UNIT ID REGISTRATION.) •  Go to the next step.
		No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE •  Drive the vehicle at a speed of 25 km/h {15.5 mph} or more for 10 min or more. •  Are there any other DTCs present?	Yes	Go to the applicable DTC inspection. (See TIRE PRESSURE MONITORING SYSTEM (TPMS) ON-BOARD DIAGNOSIS.)
		No	DTC troubleshooting completed.

Without Advanced Keyless Entry And Push Button Start System

Note

•  There are two types keyless receivers. Before performing malfunction diagnosis, verify whether the type of keyless receiver connector is type A or B.

―  Type A: Keyless receiver connector (4-pin)

―  Type B: Keyless receiver connector (6-pin)

DTC U0127:00	•  Communication failure between instrument cluster and keyless receiver
DETECTION CONDITION	•  The instrument cluster cannot receive signal from the keyless receiver.
POSSIBLE CAUSE	Type A •  Open or short circuit in the wiring harness between the keyless receiver terminal C and the instrument cluster terminal 2N. •  Keyless receiver malfunction. •  Instrument cluster malfunction. •  Poor connection at connectors (female terminal) •  BCM malfunction Type B •  Open or short circuit in the wiring harness between the keyless receiver terminal D and the instrument cluster terminal 2N. •  Keyless receiver malfunction. •  Instrument cluster malfunction. •  Poor connection at connectors (female terminal) •  BCM malfunction

Diagnostic procedure

Type A

Type B