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Home >> Hyundai >> 1993 >> Excel L4-1468cc 1.5L SOHC (8 VALVE) >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Technical Service Bulletins >> Customer Interest >> ECM - MIL ON DTC 15 Set, Stalling, A/C Inoperative >> Service Procedure - Dong Hae

Service Procedure - Dong Hae

1. Disconnect the battery ground cable.

2. Under the crash pad on the driver's side, disconnect the ECM wiring harness connectors and ground wires from the ECM. Disconnect the two main wiring harness connectors. Remove the tie-strap from around the ECM wiring harness and main wiring harness.

3. In the engine compartment, disconnect the A/C low pressure switch connector, A/C compressor bullet connector (blue to red wire). distributor connector, purge control solenoid valve connector, EGR control solenoid valve connector (California spec. vehicles only), pre-excitation resistor connector, and the ground wires leading to the firewall (G07 for Excel, G06 for Scoupe). Remove the three bolts attaching the square ECM wiring loom cover to the intake manifold surge tank. Remove the tie strap holding the EGR/purge control solenoid valve wifing to the accelerator cable.

4. Pull the ECM wifing harness grommet out of the firewall and pull approximately 6 inches of the wiring harness into the engine compartment.





5. The TP Sensor crimp connector splice is between the square ECM wiring loom cover and the firewall grommet. Carefully slice the tape that is wrapped around the corrugate plastic wiring conduit and open up the conduit to expose the splice.





6. Remove the crimp connection, by cutting the wires about one inch away from each side of the connector. Pull the wires apart. Strip approximately 1/2 inch of insulation from the end of each wire.





7. Make a jumper harness to replace the crimp connection section that was removed. The jumper should be about the same length as the piece of the connection that was removed. The jumper must be made from a length of black 12 gauge wire that has had 1/2 inch of insulation stripped from each end with a 12 gauge crimp connector fastened at each end. The crimp connectors should be of the solder type with no plastic insulation. Crimp a connector at each end of the jumper wire and then solder them.

8. Insert the two ground wires from the ECM side of the wiring harness into one of the jumper wire connectors and crimp and solder. Insert the four (or five) black wires from the other end of the ECM wiring harness into the other connector of the jumper harness. Crimp and solder.





9. Wrap the two solder connectors with electrical tape. Put the wire bundle back into the plastic conduit and rewrap tightly with electrical tape.





10. Push the wiring harness back through the firewall and reinstall the grommet. Reconnect all electrical connectors disconnected in steps 2 and 3 and reattach the square ECM wiring loom cover to the intake manifold surge tank.

11. Verify that all wiring harnesses are clear of moving parts or hot components.

12. Clean off throttle body carbon deposits per procedure given in fuel system section of the appropriate shop manual. Clean TP Sensor connector at throttle body by disconnecting and spraying with electrical contact cleaner.

13. Set the idle speed and TP Sensor according to the procedures given in the fuel system section of the appropriate shop manual.

SPECIFICATIONS:

TP Sensor = 480 - 520 mV
IDLE SPEED = 750 RPM
MP Sensor = 900 - 1000 mV

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