Test Procedure
- Turn ignition off. Connect Hi-Scan Pro tool or equivalent to OBD-II Data Link Connector (DLC). See Figure. Turn ignition on. Monitor for DTCs. If DTC P1693 is set, go to next step. If DTCs P1586 is set, do all repairs associated with that DTC before continuing with this procedure.
- Turn ignition off. Disconnect ECM 81-pin harness connector. See Figure. Also disconnect Transaxle Control Module (TCM) 26-pin harness connector C37-2. See Fig 1. Measure resistance between TCM connector C37-2 terminal No. 22 and ECM connector terminal No. 22 (Yellow/Black wire). Resistance should be one ohm or less. If resistance is as specified, go to next step. If resistance is not as specified, repair open or short circuit (in Yellow/Black wire) between ECM and TCM. After repair go to step 6.
- With ECM and TCM harness connectordisconnected. Measure resistance between ground TCM connector C37-2 terminal No. 22 (Yellow/Black wire). Resistance should be infinity. If resistance is as specified, go to next step. If resistance is not as specified, repair short circuit (in Yellow/Black wire) between ECM and TCM. After repair go to step 6.
- With ECM and TCM harness connectordisconnected. Measure voltage between ground TCM connector C37-2 terminal No. 22 (Yellow/Black wire). Voltage should be zero volts. If voltage is as specified, go to next step. If voltage is not as specified, repair short circuit (in Yellow/Black wire) between ECM and TCM. After repair go to next step 6.
- Verify than TCM and ECM connectors are secure. If connectors are okay, replace TCM with known-good component. If after TCM replacement problem persists, replace ECM and go to next step.
- Return vehicle to original condition. Clear codes using Hi-Scan Pro tool or equivalent. Verify repairs by driving vehicle and monitoring for pending codes. If DTC is set during test drive, follow appropriate DTC test procedure.
Courtesy of HYUNDAI MOTOR CO.