Removal |
When replacing the ECM, the vehicle equipped with immobilizer must be performed the procedure as below.
[In the case of installing used ECM]
[In the case of installing new ECM]
Then the ECM key register process is completed automatically.
|
1. |
Turn ignition switch OFF and disconnect the negative (-) battery cable. |
2. |
Disconnect the ECM Connector (A). |
3. |
Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner") |
4. |
Remove the mounting bolts (A) and nut (B), and then remove the ECM (C). |
5. |
Remove the ECM (B) after removing 4 nuts (A) from the bracket. |
Installation |
When replacing the ECM, the vehicle equipped with immobilizer must be performed the procedure as below.
[In the case of installing used ECM]
[In the case of installing new ECM]
Then the ECM key register process is completed automatically.
|
1. |
Install in the reverse order of removal.
|
ECM Problem Inspection Procedure |
1. |
TEST ECM GROUND CIRCUIT: Measure resistance between ECM and
chassis ground using the backside of ECM harness connector as ECM side
check point. If the problem is found, repair it.
|
2. |
TEST ECM CONNECTOR: Disconnect the ECM connector and visually
check the ground terminals on ECM side and harness side for bent pins
or poor contact pressure. If the problem is found, repair it. |
3. |
If problem is not found in Step 1 and 2, the ECM could be
faulty. If so, make sure there were no DTC's before swapping the ECM
with a new one, and then check the vehicle again. If DTC's were found,
examine this first before swapping ECM. |
4. |
RE-TEST THE ORIGINAL ECM: Install the original ECM (may be
broken) into a known-good vehicle and check the vehicle. If the problem
occurs again, replace the original ECM with a new one. If problem does
not occur, this is intermittent problem (Refer to “Intermittent
Problem Inspection Procedure” in Basic Inspection Procedure). |
Hyundai Sonata LF 2014-2019 Service Manual: Blind Spot Detection Indicator Components and Components Location
Components
1. AVM Camera2. Ambient temperature sensor3. Puddle lamp
...
Hyundai Sonata LF 2014-2019 Service Manual: Troubleshooting
Basic Troubleshooting
Basic Troubleshooting Guide
Customer Problem Analysis Sheet
Basic Inspection Procedure
Measuring Condition of Electronic Parts' Resistance
The measured resistance at high temperature after vehicle
running may be high or low. So all resistance must be measured at
ambi ...