RM3660EC _58 Vehicle Interior _080729 DOOR LOCK _0601181 WIRELESS DOOR LOCK CONTROL SYSTEM(except NR Series Engine with Smart Entry and Start System) C

DOOR LOCK WIRELESS DOOR LOCK CONTROL SYSTEM(except NR Series Engine with Smart Entry and Start System) B124296 Wireless Door Lock Tuner Component Internal Failure

DESCRIPTION

The electrical key and tire pressure warning ECU and 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 electrical key and tire pressure warning ECU and receiver. The electrical key and tire pressure warning ECU and 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 electrical key and tire pressure warning ECU and receiver. · Short to ground in RDAM terminal circuit when voltage (5 V) is not being output from terminal RCO	· Wire harness or connector · Electrical key and tire pressure warning ECU and receiver · Certification ECU (smart key ECU assembly)

WIRING DIAGRAM

5.104,2.813 6.625,3.302 1.521,0.49 10 false Certification ECU (Smart Key ECU Assembly) 1.635,0.781 2.552,0.979 0.917,0.198 10 false DATA 1.823,1.438 2.74,1.635 0.917,0.198 10 false +5 0.24,2.958 2.896,3.479 2.656,0.521 10 false Electrical Key and Tire Pressure Monitoring System Receiver Assembly 0.24,2.802 2.583,3.042 2.344,0.24 10 false O161*1, O18*2 5.177,1.448 6.094,1.646 0.917,0.198 10 false RCO 5.167,0.792 6.083,0.99 0.917,0.198 10 false RDAM 2.083,0.781 2.5,1.021 0.417,0.24 10 false 2 2.094,1.448 2.51,1.688 0.417,0.24 10 false 8 2.063,2.073 2.479,2.313 0.417,0.24 10 false 12 4.833,0.688 5.25,0.927 0.417,0.24 10 false 11 4.771,0.875 5.292,1.156 0.521,0.281 10 false O174 4.833,1.344 5.25,1.583 0.417,0.24 10 false 21 4.833,2 5.25,2.24 0.417,0.24 10 false 29 4.802,2.188 5.396,2.5 0.594,0.313 10 false I196 5.177,2.188 5.594,2.427 0.417,0.24 10 false E 1.698,2.188 2.115,2.427 0.417,0.24 10 false GND 4.771,1.531 5.302,1.833 0.531,0.302 10 false O174 6.281,1.208 7.156,1.406 0.875,0.198 10 false IC 5.865,0.365 6.781,0.563 0.917,0.198 10 false 12 V 3.146,3.063 5.49,3.302 2.344,0.24 10 false *1: except M20C-FKS 3.146,3.365 5.49,3.604 2.344,0.24 10 false *2: for M20C-FKS

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 / Smart Key(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 electrical key and tire pressure warning ECU and receiver and wire harness, do not change the position or length of the wire harness. If the wire harness is too close to the electrical key and tire pressure warning ECU and 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 electrical key and tire pressure warning ECU and receiver has been replaced, it is necessary to perform initialization (Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM (for Gasoline Model (for Type B))>INITIALIZATION202304,999999,_53,_080780,_0592791,RM100000002AHU8,) after registration (Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM (for Gasoline Model (for Type B))>REGISTRATION202304,999999,_53,_080780,_0592791,RM100000002AHU7,) of the transmitter IDs to the electrical key and tire pressure warning ECU and receiver assembly.

·

When replacing the electrical key and tire pressure warning ECU and 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 (for Gasoline Model (for Type B))>INITIALIZATION202304,999999,_53,_080780,_0592791,RM100000002AHU8,

PROCEDURE

1.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Disconnect the O161*1, O18*2 electrical key and tire pressure warning ECU and receiver connector.

*1: except M20C-FKS

*2: for M20C-FKS

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

4.667,0.333 5.167,0.583 0.5,0.25 3.354,0.333 3.854,0.583 0.5,0.25 4.604,1.26 4.833,2.25 4.833,2.25 5,2.25 true 3.698,1.25 3.698,2.25 3.698,2.25 3.865,2.25 true 3.604,1.156 3.604,2.573 3.604,2.573 3.771,2.573 true 4.813,0.375 5.271,0.573 0.458,0.198 10 false I196 5.052,2.177 5.604,2.333 0.552,0.156 10 false E 0.26,0.167 0.719,0.365 0.458,0.198 10 false *a 3.469,0.385 3.927,0.583 0.458,0.198 10 false O174 3.917,2.188 4.469,2.344 0.552,0.156 10 false RCO 3.844,2.5 4.396,2.656 0.552,0.156 10 false RDAM

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I196-29 (E) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
O174-11 (RDAM) - I196-29 (E)	Always	11 to 14 V
O174-21 (RCO) - I196-29 (E)	Always	Below 1 V → 4.5 to 5.5 V pulse generation at regular intervals

Result:

Proceed to
OK
NG

REPLACE ELECTRICAL KEY AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY

Click hereVehicle Interior>DOOR LOCK>DOOR CONTROL RECEIVER>REMOVAL202304,999999,_58,_080729,_0392014,RM100000002AV09,

2.CHECK HARNESS AND CONNECTOR (ELECTRICAL KEY AND TIRE PRESSURE WARNING ECU AND RECEIVER - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

Disconnect the O174 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

except M20C-FKS
Tester Connection	Condition	Specified Condition
O174-11 (RDAM) - O161-2 (DATA)	Always	Below 1 Ω
O174-21 (RCO) - O161-8 (+5)	Always	Below 1 Ω
O161-12 (GND) - Body ground	Always	Below 1 Ω
O161-2 (DATA) or O174-11 (RDAM) - Other terminals and body ground	Always	10 kΩ or higher
O161-8 (+5) or O174-21 (RCO) - Other terminals and body ground	Always	10 kΩ or higher

for M20C-FKS
Tester Connection	Condition	Specified Condition
O174-11 (RDAM) - O18-2 (DATA)	Always	Below 1 Ω
O174-21 (RCO) - O18-8 (+5)	Always	Below 1 Ω
O18-12 (GND) - Body ground	Always	Below 1 Ω
O18-2 (DATA) or O174-11 (RDAM) - Other terminals and body ground	Always	10 kΩ or higher
O18-8 (+5) or O174-21 (RCO) - Other terminals and body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR