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.
Specification (Resistance): 1Ω or
less
| |
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, replace the ECM with a new one, and then
check the vehicle again. If the vehicle operates normally then the
problem was likely with the 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 PROCEDURE in BASIC INSPECTION
PROCEDURE). |
VIN PROGRAMMING PROCEDURE
VIN (Vehicle
Identification Number) is a number that has the vehicle's information
(Maker, Vehicle Type, Vehicle Line/Series, Body Type, Engine Type,
Transmission Type, Model Year, Plant Location and so forth. For more
information, please refer to the group "GI" in this SERVICE MANUAL). When
replacing an PCM, the VIN must be programmed in the ECM/PCM. If there is
no VIN in ECM/PCM memory, the fault code (DTC P0630) is set.
The programmed VIN cannot be changed. When
writing the VIN, confirm the VIN
carefully |
1. |
Select "Vehicle" and "Engine" (For example,
TUCSON 2.0L L4).

|
2. |
Select "VIN WRITING".

|
3. |
Check the ECM/PCM status.

•
|
VIRGIN: VIN is not
programmed |
•
|
LEARNT: VIN has been already
programmed | |
Is the PCM status "VIRGIN"?

▶ Go to next step 4.

▶ END |
4. |
Write the VIN with cursor, function and number
keys.
Before pressing the "ENTER" key, confirm
the VIN again because the programmed VIN cannot be
changed. |

|
5. |
After verifying the written VIN, press the
"ENTER" key. |
6. |
Turn the ignition switch OFF, and then turn
ON.

|
7. |
Verify the programmed VIN in the PCM
memory. |