Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ENGINE SWITCH)
DTC B2784 Antenna Coil Open / Short |
DESCRIPTION
This DTC is output when there is an open or short in the key coil (built into the engine switch).| DTC No. | DTC Detection Condition | Trouble Area |
| B2784 | Antenna coil is open/shorted |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- If the certification ECU (smart key ECU assembly) is replaced, register the key and ECU communication ID (COROLLA_ZRE142 RM000000QYF05AX.html).
| 1.CHECK DTC OUTPUT |
Clear the DTCs (COROLLA_ZRE142 RM000001GV807OX.html).
Recheck for DTCs.
- OK:
- B2784 is not reoutput.
|
| ||||
| OK | ||
| ||
| 2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ENGINE SWITCH) |
Disconnect the certification ECU (smart key ECU assembly) connector.
Disconnect the engine switch connector.
 |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E36-9 (CODE) - E38-10 (CODE) Always Below 1 Ω E36-8 (TXCT) - E38-9 (TXCT) Always Below 1 Ω E36-9 (CODE) - Body ground Always 10 kΩ or higher E36-8 (TXCT) - Body ground Always 10 kΩ or higher
|
| ||||
| OK | |
| 3.REPLACE ENGINE SWITCH |
Replace the engine switch (COROLLA_ZRE142 RM000002YWC033X.html).
| NEXT | |
| 4.CHECK DTC OUTPUT |
Clear the DTCs (COROLLA_ZRE142 RM000001GV807OX.html).
Recheck for DTCs.
- OK:
- B2784 is not reoutput.
|
| ||||
| OK | ||
| ||