Toyota Corolla Cross: Wireless Door Lock Tuner Component Internal Failure (B124296)
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 |
|
|
WIRING DIAGRAM
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 the Registration.
- for HEV Model: Click here
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- for Gasoline Model: Click here
- for HEV Model: Click here
- 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 here
) after registration (Click here
) 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 here
PROCEDURE
|
1. | CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Disconnect the O209 door control receiver connector.
(b) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
|
*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 |
| NG | .gif) | GO TO STEP 3 |
|
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| 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.
|
*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 |
| OK | | REPLACE REPLACE DOOR CONTROL RECEIVER |
| NG | | GO TO STEP 3 |
| 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) - O209-2 (DATA) |
Always | Below 1 Ω |
|
O200-21 (RCO) - O209-8 (+5) |
Always | Below 1 Ω |
|
O209-12 (GND) - Body ground |
Always | Below 1 Ω |
|
O209-2 (DATA)- Body ground |
Always | 10 kΩ or higher |
|
O200-11 (RDAM) - Body ground |
Always | 10 kΩ or higher |
|
O209-8 (+5) - Body ground |
Always | 10 kΩ or higher |
|
O200-21 (RCO) - Body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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