Auto Transaxle Diode Corrosion

Model:Hyundai H100 Truck (HR)

Year model: 2004

Mileage: 130956 km

Displacement: 2000cc

Fuel: Gasoline

T/A: All

Subject: Automatic Transmission Diode Corrosion in the Wiring Control

1) Condition;

1. Harsh Shift and Trans axle Hold in 3rd gear fail safe.

2) Cause:

1. Corrosion of the ATM diode pins in the control wiring.

3) Diagnosis:

1. Scan tool Check
   = Diagnostic Trouble Code
   1) P0707 – Transaxle range switch – open circuit.
   2) P0708 – Transaxle range switch – short circuit.
   3) P1529 – TCM error – Invalid message
   4) P1586 – Encoding signal circuit not rational.
2. Remove the control wiring grommet.
3. Locate the ATM diode that is wrapped up yellow tape loose yellow tape from the control wiring.
4. Disconnect the ATM diode using long nose pliers.
5. Clean the diode connector (Female side) using solvent.
6. Apply contact grease in each opening of the diode connector terminal (Contact grease (P/No. : 08970 – 00010)).
7. Insert the new ATM diode into the diode connector.
8. Reinstall the wiring and water proof tape around the control wiring within the range as shown.

4) Repair Guide:

1. Replace the Auto TM diode.
   = Do not replace auto TM or control wiring harness.

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