Toyota Corolla Cross: Push Switch / Key Unlock Warning Switch Malfunction (B2780)
DESCRIPTION
This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Note |
|---|---|---|---|---|
| B2780 |
Push Switch / Key Unlock Warning Switch Malfunction |
The unlock warning switch assembly is not detected as being on when the ignition switch is ON (1 trip detection logic*). |
| DTC Output Confirmation Operation:
|
- *: Only output while a malfunction is present.
|
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
|---|---|
|
Engine cannot be started |
- |
|
DTC No. | Data List and Active Test |
|---|---|
|
B2780 | Key SW |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- If the transponder key ECU assembly is replaced, refer to Registration.
Click here
.gif)
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
|
1. | INSPECT UNLOCK WARNING SWITCH ASSEMBLY |
Click here
| NG | .gif) | REPLACE UNLOCK WARNING SWITCH ASSEMBLY |
|
.gif)
| 2. |
CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - TRANSPONDER KEY ECU ASSEMBLY - BODY GROUND) |
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
I13-1 (UN+) - I67-5 (KSW) |
Always | Below 1 Ω |
|
I13-2 (UN-) - Body ground |
Always | Below 1 Ω |
|
I13-1 (UN+) or I67-5 (KSW) - Other terminals and body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE TRANSPONDER KEY ECU ASSEMBLY
|
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Antenna Coil Open / Short (B2784)
DESCRIPTION When an open or short circuit is detected in the antenna coil built into the transponder key coil, the transponder key ECU assembly stores this DTC.
DTC No. Detection Item
DTC
Transponder Chip Malfunction (B2793,B2797)
DESCRIPTION
DTC B2793 is stored when a malfunction is found in the door control transmitter assembly during key ID code registration or a key ID code is not registered normally. Replace the door
Unmatched Encryption Code (B2794)
DESCRIPTION This DTC is stored when a door control transmitter assembly with an incomplete key ID code is inserted into the ignition key cylinder.
DTC No. Detection Item
DTC Detection Con
SEE MORE:
Initialization
INITIALIZATION INITIALIZE MULTIPLEX NETWORK DOOR ECU
NOTICE: Initialization of the multiplex network door ECU (back door initial position learning) is necessary if the following work procedures are performed while the back door is open.
The cable to the negative (-) auxiliary battery terminal is
Lost Communication with Air Inlet Damper Control Servo Motor LIN Missing Message (B143A87)
DESCRIPTION The air conditioning harness assembly and No. 1 air conditioning radiator damper servo sub-assembly connect the air conditioning amplifier assembly and the No. 1 blower damper servo sub-assembly. The air conditioning amplifier assembly supplies power and sends operation instructions to N
