Hyundai Sonata: Transaxle Control Module (TCM). Repair procedures
Replacement
In the case of the vehicle equipped with immobilizer
or button engine start system, perform "Key Teaching" procedure together
(Refer to "Immobilizer" or "Button Engine Start System in BE group).
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1. |
Turn ignition switch OFF and disconnect the negative
(-) battery cable.
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2. |
Remove the air cleaner assembly (Refer to "Intake
And Exhaust System" in EM group).
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3. |
Remove the TCM connector(A) after removing the TCM(B).
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TCM Problem Inspection Procedure
1. |
TEST TCM GROUND CIRCUIT: Measure resistance between
TCM and chassis ground using the backside of TCM harness connector as
TCM side check point. If the problem is found, repair it.
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2. |
TEST TCM CONNECTOR: Disconnect the TCM connector
and visually check the ground terminals on TCM side and harness side
for bent pins or poor contact pressure. If the problem is found, repair
it.
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3. |
If problem is not found in Step 1 and 2, the TCM
could be faulty. If so, make sure there were no DTC's before swapping
the TCM with a new one, and then check the vehicle again. If DTC's were
found, examine this first before swapping TCM.
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4. |
RE-TEST THE ORIGINAL TCM: Install the original TCM
(may be broken) into a known-good vehicle and check the vehicle. If
the problem occurs again, replace the original TCM with a new one. If
problem does not occur, this is intermittent problem (Refer to “Intermittent
Problem Inspection Procedure” in Basic Inspection Procedure).
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Adjustment
TCM Learning |
When shift shock is occurred or parts related with the transaxle
are replaced, TCM learning should be performed.
In the following case, TCM learning is required.
• |
Transaxle assembly replacement
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• |
TCM replacement
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• |
TCM upgrading
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1. |
TCM learning condition
- ATF temperature: 60~115°C (140~239°F)
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2. |
TCM learning procedure
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Up-shift throttle open : 15~30%
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Transaxle Control Module (TCM). Schematic Diagrams
1. TCM Connector and Terminal Function
2. TCM Terminal Function
Connector [CHG-AG]
Pin
Description
Pin
Description
1
& ...
Input Speed Sensor. Description and Operation
Description
- Integrated one unit for input & output speed sensor
- Differential current type (low: 7mA, high: 14mA)
- Failsafe: 4th gear hold (D), 2nd ~ 4th manual shift (S)
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See also:
Specifications
Specifications
Hood
Type
Rear hinged, gas lifter type
Front Door
Construction
Front hinged, frame door construction
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CD Player : Audio with internal amplifier / Audio with external amplifier
...
Schematic Diagrams
Circuit Diagram
...