DOOR LOCK WIRELESS DOOR LOCK CONTROL SYSTEM(w/ Smart Entry and Start System) B124296 Wireless Door Lock Tuner Component Internal Failure

DESCRIPTION

The door control receiver is used to receive radio waves related to the entry functions of the electrical key transmitter sub-assembly. The certification ECU (smart key ECU assembly) decodes the requested electrical key transmitter sub-assembly operation by identifying a key code based on the radio waves received via the door control receiver. The door control receiver receives a signal from the electrical key transmitter sub-assembly and sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly). (ex. If a door lock operation is requested, the certification ECU (smart key ECU assembly) sends a door lock command to the main body ECU (multiplex network body ECU)).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B124296	Wireless Door Lock Tuner Component Internal Failure	· Short to ground in RDAM terminal circuit between the certification ECU (smart key ECU assembly) and door control receiver. · Short to ground in RDAM terminal circuit when voltage (5 V) is not being output from terminal RCO	· Wire harness or connector · Door control receiver · Certification ECU (smart key ECU assembly)

WIRING DIAGRAM

1.25,1.198 1.865,1.396 0.615,0.198 10 false DATA 1.427,2.24 2.042,2.438 0.615,0.198 10 false +5 5.792,1.208 6.406,1.406 0.615,0.198 10 false RDAM 5.792,2.271 6.406,2.469 0.615,0.198 10 false RCO 5.813,3.052 6.427,3.25 0.615,0.198 10 false E 1.302,3.042 1.917,3.24 0.615,0.198 10 false GND 0.604,3.542 1.219,3.74 0.615,0.198 10 false O18 5.531,3.542 7.042,3.885 1.51,0.344 10 false Certification ECU (Smart Key ECU Assembly) 0.604,3.729 2.104,3.948 1.5,0.219 10 false Door Control Receiver 1.719,1.219 2.333,1.417 0.615,0.198 10 false 2 1.708,2.24 2.323,2.438 0.615,0.198 10 false 8 1.708,2.927 2.323,3.125 0.615,0.198 10 false 12 5.427,3.021 6.042,3.219 0.615,0.198 10 false I222 5.396,1.302 6.01,1.5 0.615,0.198 10 false O200 5.396,2.344 6.01,2.542 0.615,0.198 10 false O200 5.49,1.104 6.104,1.302 0.615,0.198 10 false 11 5.479,2.833 6.094,3.031 0.615,0.198 10 false 29 5.49,2.167 6.104,2.365 0.615,0.198 10 false 21 0.75,1.813 0.938,2 0.188,0.188 10 false IC 6.229,0.813 6.469,1.01 0.24,0.198 10 false +B 6.25,1.833 6.49,2.031 0.24,0.198 10 false 5 V

CAUTION / NOTICE / HINT

NOTICE:: ·

When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

If the certification ECU (smart key ECU assembly) is replaced, refer to Service Bulletin.

·

When replacing or inspecting the door control receiver and wire harness, do not change the position or length of the wire harness. If the wire harness is too close to the door control receiver, the performance of the entry function and wireless function may be affected.

·

This DTC is not stored within 10 seconds of the ignition switch being turned from on to off.

·

Make sure that there are no electrical key transmitter sub-assemblies in the vehicle.

·

If the door control receiver has been replaced, it is necessary to perform initialization (Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>INITIALIZATION202201,999999,_53,_113127,_0503457,RM100000001ZEHE,) after registration (Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>REGISTRATION202201,999999,_53,_113127,_0503457,RM100000001ZEHD,) of the transmitter IDs to the door control receiver assembly.

·

When replacing the door control receiver, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the GTS and write them down before removal.

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>REGISTRATION202201,999999,_53,_113127,_0503457,RM100000001ZEHD,

PROCEDURE

1.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

a.

Disconnect the O18 door control receiver connector.

b.

Measure the voltage and resistance and check for pulses according to the value(s) in the table below.

4.76,0.5 5.26,0.75 0.5,0.25 3.396,0.5 3.896,0.75 0.5,0.25 1.948,0.5 2.448,0.75 0.5,0.25 3.302,2.104 3.604,1.271 true 4.083,2.094 3.708,1.365 true 4.979,2.094 4.604,1.365 true 4.875,0.531 5.333,0.729 0.458,0.198 10 false I222 3.479,0.531 3.938,0.729 0.458,0.198 10 false O200 2.063,0.531 2.521,0.729 0.458,0.198 10 false I223 3.969,2.125 4.427,2.323 0.458,0.198 10 false RCO 4.948,2.115 5.406,2.313 0.458,0.198 10 false E 3.094,2.135 3.604,2.375 0.51,0.24 10 false RDAM 0.188,0.146 0.5,0.344 0.313,0.198 10 false *a

*a

Component with harness connected
(Certification ECU (Smart Key ECU Assembly))

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I222-29 (E) - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

OK

2.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

3.CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

2.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

a.

Measure the voltage and resistance and check for pulses according to the value(s) in the table below.

4.76,0.5 5.26,0.75 0.5,0.25 3.396,0.5 3.896,0.75 0.5,0.25 1.948,0.5 2.448,0.75 0.5,0.25 3.302,2.104 3.604,1.271 true 4.083,2.094 3.708,1.365 true 4.979,2.094 4.604,1.365 true 4.875,0.531 5.333,0.729 0.458,0.198 10 false I222 3.479,0.531 3.938,0.729 0.458,0.198 10 false O200 2.063,0.531 2.521,0.729 0.458,0.198 10 false I223 3.969,2.125 4.427,2.323 0.458,0.198 10 false RCO 4.948,2.115 5.406,2.313 0.458,0.198 10 false E 3.094,2.135 3.604,2.375 0.51,0.24 10 false RDAM 0.188,0.146 0.5,0.344 0.313,0.198 10 false *a

*a

Component with harness connected
(Certification ECU (Smart Key ECU Assembly))

-

Standard Voltage:

Tester Connection	Condition	Specified Condition
O200-11 (RDAM) - I222-29 (E)	Always	11 to 14 V
O200-21 (RCO) - I222-29 (E)	Always	Below 1 V → 4.5 to 5.5 V pulse generation at regular intervals

Result:

Proceed to
OK
NG

OK

REPLACE REPLACE DOOR CONTROL RECEIVER

Click hereVehicle Interior>DOOR LOCK>DOOR CONTROL RECEIVER>REMOVAL202201,202307,_58,_115226,_0510794,RM1000000020B44,202307,999999,_58,_115226,_0510794,RM100000002CO94,

NG

3.CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

a.

Disconnect the O200 certification ECU (smart key ECU assembly) connector.

b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
O200-11 (RDAM) - O18-2 (DATA)	Always	Below 1 Ω
O200-21 (RCO) - O18-8 (+5)	Always	Below 1 Ω
O18-12 (GND) - Body ground	Always	Below 1 Ω
O18-2 (DATA)- Body ground	Always	10 kΩ or higher
O200-11 (RDAM) - Body ground	Always	10 kΩ or higher
O18-8 (+5) - Body ground	Always	10 kΩ or higher
O200-21 (RCO) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR