DTC B1189
Precautions: Precautions for Diagnosing Trouble · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
B1189: Immobilizer Antenna Communication Error Communication error with engine switch (incorporating immobilizer coil antenna). |
•Engine switch circuit / connector
•Engine switch •Keyless start control module |
Circuit Diagram
| [A]: | Engine switch connector (View: [a]) | A2: | Engine switch signal circuit 2 | 1. | Engine switch (including immobilizer coil antenna) |
| [B]: | Keyless start control module connector (View: [a]) | A3: | Engine switch signal circuit 3 | 2. | Keyless start control module |
| A1: | Engine switch signal circuit 1 | A4: | Engine switch signal circuit 4 |
DTC Confirmation Procedure
1)Remove remote controller battery. 
2)Touch remote controller to engine switch and set ignition “ON”.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Engine switch signal circuit check
1)Check that ignition is “OFF”.
2)Disconnect “G140” and “G16” connectors.
3)Check for proper terminal connection to “G140” and “G16” connectors.
4)If connections are OK, check the following points.
•Resistance of “A1”, “A2”, “A3” and “A4” circuits: less than 1 Ω
•Resistance between each of “A1”, “A2”, “A3” and “A4” circuits and ground: infinity •Resistance between circuit terminal and other terminals at “G140” connector: infinity Is check result OK?
|
Go to Step 2.
|
Repair or replace defective wire harness.
|
| 2 |
DTC check
1)Replace engine switch.
2)Perform DTC Confirmation Procedure and then recheck DTC.
Is DTC B1189 still detected?
|
Replace keyless start control module and recheck DTC.
|
End. (Engine switch was faulty)
|