Engine Immobiliser System (W/O Smart Key System) Ecu Power Source Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY)
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BODY GROUND)
ENGINE IMMOBILISER SYSTEM (w/o Smart Key System) - ECU Power Source Circuit |
DESCRIPTION
This circuit provides power to operate the transponder key ECU assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- If the transponder key ECU assembly is replaced, register the key and ECU communication ID (COROLLA_ZRE142 RM00000120Y02CX.html).
| 1.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY) |
Disconnect the transponder key ECU assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection
| Condition
| Specified Condition
|
E21-1 (+B) - Body ground
| Always
| 11 to 14 V
|
E21-2 (IG) - Body ground
| Ignition switch off
| Below 1 V
|
E21-2 (IG) - Body ground
| Ignition switch ON
| 11 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE FUSE |
|
|
| 2.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BODY GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
E21-16 (GND) - Body ground
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
