Service Procedure - Kyung Shin

1. Disconnect the battery ground cable.

2. Under the crash pad on the drivers side, disconnect the ECU wiring harness connectors (C50-1,-2,-3) and ground wires (G08) from the ECU. Disconnect the two main wiring harness connectors (MC01,02). Remove the tie-strap from around the ECU wiring harness and main wiring harness.

3. In the engine compartment, disconnect the A/C pressure switch connector (C18), A/C compressor bullet connector (C20), distributor connector (C21), purge control solenoid valve connector (C39), EGR control solenoid valve connector (California spec. only) (C41), preexcitation resistor connector (C40), and the ground wires leading to the firewall (G07). Remove the three bolts attaching the square ECU wiring loom cover to the surge tank. Remove the tie wrap holding the EGR/purge control solenoid valve wiring to the accelerator cable.

4. Carefully feed the wiring harness under the crash pad and through the firewall grommet opening. Pull the ECU wiring harness completely into the engine compartment.

5. The T.P.S. crimp connection splice is located about 8 inches from the firewall grommet on the ECU end of the harness.


6. Peel open the wiring harness cover to find the splice. Remove any electrical tape or shrink wrap tubing over the splice.
7. Solder the crimp connection following the techniques given on page 2.


8. Retape the connection whh black electrical tape. Rewrap the wiring bundle with the original cover.

9. Reinstall the wiring harness. Screw the square ECU wiring loom cover back onto the surge tank. Reconnect all the electrical connectors removed in steps 2 and 3 and replace the tie straps taken off. Reconnect the battery ground cable.

10. Verify that all wiring is clear of moving parts or hot components.

11. Using the M.U.T., check that the idle speed and TPS voltages are within specifications. If necessary, adjust acoording to the procedure provided in the 1990 Excel Shop Manual pages 31-16 through 31-18.