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Home >> Kia >> 2001 >> Sephia Base, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - Fa4AEL >> Symptom Tests >> Test B: Engine Stalls When Shifting From Neutral To Drive Or Neutral To Reverse >> Diagnostic Procedure

Diagnostic Procedure

  1. Check for codes. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE as follows:

    Were any codes found? If so, diagnose and repair as necessary. If no codes were found or problem remains, go to next step.

  2. Check ATF for contamination or low level. If ATF condition and fluid level is okay, go to next step. If ATF is burnt, contaminated or level is low, repair condition and retest. See appropriate OVERHAUL article.
  3. Using DVOM, backprobe terminal No. 38 of the TCM for duty cycle measurements. With engine off (ignition ON), depress throttle fully (open). Duty cycle should read 19 percent. Release throttle (closed). Readings should now read 95 percent. If readings are as specified, go to next step. If readings are not as specified, check for fault in throttle position sensor circuit.
  4. Check hydraulic pressure readings. See HYDRAULIC PRESSURE TESTS  under PERFORMANCE TESTS. If results are within specification, go to next step. If tests are not as specified, check for pressure control solenoid valve or valve body malfunction. See PRESSURE CONTROL SOLENOID  under COMPONENT TESTS.
  5. Check pin voltages of TCM. See PIN VOLTAGE TESTS . If pin voltages are within specifications, go to next step. If pin voltages differ from specifications, check TR switch. See TRANSAXLE RANGE SWITCH  under COMPONENT TESTS. If continuity of TR switch is okay, go to next step. If TR switch measurements are not as specified, replace TR switch. See TRANSAXLE RANGE SWITCH  under REMOVAL & INSTALLATION.
  6. Turn ignition on. Disconnect transaxle connector. Check TCC solenoid valve resistance between (transaxle connector) terminal No. 2 and ground. Resistance should be between 14-18 ohms. Test the output voltage reading from TCM connector terminal No. 4. Battery voltage should be present. If resistance measurements differ from specification, check for faulty wiring or TCC solenoid valve. See SHIFT & TCC SOLENOIDS  under COMPONENT TESTS. If resistance is okay, but voltage reading is not, replace TCM. See TRANSAXLE CONTROL MODULE  under REMOVAL & INSTALLATION. If both measurements are as specified, go to next step.
  7. Turn ignition on. Check TR signal at TCM terminal No. 18. In "P" and "N" positions, reading should be zero volts. In all other positions, reading should be battery voltage. If measurements are as specified, check wiring between terminal No. 18 of TCM and terminal No. 9 of TR switch for corrosion, open, pinched or shorted condition. If readings are not as specified, go to next step.
  8. Perform stall speed test. See STALL SPEED TEST  under PERFORMANCE TESTS. Is stall speed 2200-2500 RPM? If so, replace TCM. See TRANSAXLE CONTROL MODULE  under REMOVAL & INSTALLATION. If stall speed is not within specification, overhaul transaxle, see appropriate OVERHAUL article.
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