DTC P1645 / P1646
Precautions: Precautions for Diagnosing Trouble · Precautions for Immobilizer System · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P1645: ID Code Communication Error Communication error with ID controller. |
•CAN communication circuit
•ID controller and/or its circuit •ECM •Keyless entry control module |
|
P1646: ID Code Incorrectness CAN communication error or verification error between ECM and ID controller. |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
DTC check
1)Set ignition “OFF” and leave ignition “OFF” for 5 seconds or more.
2)Set ignition “ON”.
3)Recheck DTC.
Is current DTC P1645 or P1646 detected?
|
Go to Step 2.
|
Check for intermittent trouble.
|
| 2 |
DTC check
1)Check DTC related to CAN communication.
Is there any CAN-DTC(s) detected?
|
Go to troubleshooting for applicable DTC.
|
Go to Step 3.
|
| 3 |
ID controller power supply and ground circuit check
1)Check power supply and ground circuits of ID controller for open circuit, short circuit and high resistance.
Is check result OK?
|
Go to Step 4.
|
Repair or replace defective parts.
|
| 4 |
CAN communication circuit check
1)Check CAN communication circuit referring to “Troubleshooting for Communication Bus Off” in Section 10H.
•M16A model:
•D16AA model: Is check result OK?
|
Go to Step 5.
|
Repair or replace defective wire harness.
|
| 5 |
ECM registration
1)Perform ECM Registration:Ignition Switch Model.
2)Check that ignition is “OFF”.
3)Set ignition “ON”.
4)Recheck DTC.
Is DTC P1645 or P1646 still detected?
|
Replace ECM and recheck DTC. If DTC P1645 or P1646 is still detected, replace keyless entry control module and recheck DTC.
•ECM:
—M16A model:
•Keyless entry control module: —D16AA model: |
End. (ECM was not registered)
|