Home ReviewsRefund
Home/Kia/Rio/Kia Rio III (2011-2015)/Repair manual/Automatic Trans/Automatic Transaxle Control System: Diagnosis
Contents Wiring diagrams Section: Automatic Trans All sections

Automatic Transaxle Control System: Diagnosis Kia Rio III

Automatic Trans 37 illustrations ~2105 words

Fault Diagnosis

Features a fail-safe mechanism that prevents dangerous situations from developing in the event of a transaxle failure.

The limp home mode engages if the transaxle malfunctions. In this mode, the transaxle operates at a minimal functionality level, making it possible for the vehicle to reach a service center.

Fail-Safe: Prevents dangerous situations from developing in the event of a malfunction.

Limp Home: Maintains minimal functionality (*) in the event of a malfunction, making it possible for the vehicle to reach a service center.

(*) Minimal Functionality: Drive (fixed gear setting), Reverse, and Neutral

Self-diagnosis

TCM is in constant communication with the control system's components (sensors and solenoids). If an abnormal signal is received for longer than the predefined duration, TCM recognizes a fault, stores the fault code in memory, and then sends out a fault signal through the self-diagnosis terminal. Such fault codes are independently backed up and will not be cleared even if the ignition switch is turned off, the battery is disconnected, or the TCM connector is disconnected.

CAUTIONDisconnecting a sensor or an actuator connector while the ignition switch is in the "On" position generates a diagnostic trouble code (DTC) and commits the code to memory. In such event, disconnecting the battery will not clear the fault diagnosis memory. The diagnosis tool must be used to clear the fault diagnosis memory. Before removing or installing any part, read the diagnostic trouble codes and then disconnect the battery negative (-) terminal. Before disconnecting the cable from battery terminal, turn the ignition switch to OFF. Removal or connection of the battery cable during engine operation or while the ignition switch is ON could cause damage to the TCM. When checking the generator for the charging state, do not disconnect the battery '+' terminal to prevent the ECM from damage due to the voltage. When charging the battery with the external charger, disconnect the vehicle side battery terminals to prevent damage to the TCM.

Checking Procedure (Self-diagnosis)

CAUTIONWhen battery voltage is excessively low, diagnostic trouble codes can not be read. Be sure to check the battery for voltage and the charging system before starting the test Diagnosis memory is erased if the battery or the TCM connector is disconnected. Do not disconnect the battery before the diagnostic trouble codes (DTC) are completely read and recorded.

Inspection Procedure (Using the GDS)

  1. Turn OFF the ignition switch.
  2. Connect the GDS to the data link connector on the lower crash pad.
  3. Turn ON the ignition switch.
  4. Use the GDS to check the diagnostic trouble code.
  5. Repair the faulty part from the diagnosis chart.
  6. Erase the diagnostic trouble code.
  7. Disconnect the GDS. CAUTION: Perform TCM learning after replacing the automatic transaxle to prevent slow automatic transaxle response, jerky acceleration and jerky startup. (Refer to «REPAIR PROCEDURES»(ref-536108-S17174924252013031400000) . Adding automatic transaxle fluid. (Refer to «FLUID»(ref-536106-S21760354932013031400000) . After servicing the automatic transaxle or TCM, clear the diagnostic trouble code (DTC) using the GDS tool. Diagnostic trouble codes (DTC) cannot be cleared by disconnecting the battery.

TCM Problem Inspection Procedure

  1. TEST TCM GROUND CIRCUIT: Measure resistance between TCM and chassis ground using the backside of TCM harness connector as TCM side check point. If the problem is found, repair it. Specification: Below 1ohms
  2. TEST TCM CONNECTOR: Disconnect the TCM connector and visually check the ground terminals on TCM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.
  3. If problem is not found in Step 1 and 2 , the TCM could be faulty. If so, make sure there were no DTC's before swapping the TCM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping TCM.
  4. RE-TEST THE ORIGINAL TCM: Install the original TCM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original TCM with a new one. If problem does not occur, this is intermittent problem (Refer to «BASIC INSPECTION PROCEDURE»(ref-536092-S01086643492013031400000) .

Inspection

  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.

Scheme 82

Scheme 82: Removal
Scheme 82: Removal

Scheme 83

Scheme 83
Scheme 83

Scheme 84

Scheme 84
Scheme 84

Scheme 85

Scheme 85
Scheme 85
  1. Remove the battery and the battery tray. (Refer to " «CHARGING SYSTEM»(ref-536081) " in EE group.)
  2. Remove the under cover (A). Tightening torque: 6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)
  3. Replace new gasket and the plug after draining the automatic transaxle fluid by removing the drain plug. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  4. Remove the air breather hose (A).
  5. Remove the valve body cover (B). Tightening torque: 13.7 ~ 15.7 N.m (1.4 ~ 1.6 kgf.m, 10.8 ~ 11.6 lb-ft)
  6. Disconnect the oil temperature sensor connector (A).
  7. Remove the oil temperature sensor (A) after removing a bolt. Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Scheme 86

Scheme 86: Installation
Scheme 86: Installation
  1. Installation is the reverse of removal. NOTE: After replacement or reinstallation procedure of the valve body assembly, must perform procedures below. The gasket of the valve body gasket (A) use new one. Adding automatic transaxle fluid. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  1. Check signal waveform of Input & output speed sensor using the GDS. Specification: Refer to «Signal Waveform»(ref-536108-S01041036482013031400000) .

Scheme 87

Scheme 87: Removal
Scheme 87: Removal

Scheme 88

Scheme 88
Scheme 88

Scheme 89

Scheme 89
Scheme 89

Scheme 90

Scheme 90
Scheme 90

Scheme 91

Scheme 91
Scheme 91

Scheme 92

Scheme 92
Scheme 92
  1. Remove the battery and the battery tray. (Refer to " «CHARGING SYSTEM»(ref-536081) " in EE group.)
  2. Remove the under cover (A). Tightening torque: 6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)
  3. Replace new gasket and the plug after draining the automatic transaxle fluid by removing the drain plug. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  4. Remove the air breather hose (A).
  5. Remove the valve body cover (B). Tightening torque: 13.7 ~ 15.7 N.m (1.4 ~ 1.6 kgf.m, 10.8 ~ 11.6 lb-ft) NOTE: Remove installation bolts in the engine compartment first and then remove others under the vehicle.
  6. Remove the plate and the detent spring (A) after removing the bolt. Tightening torque: 11.8 ~ 15.7 N.m (1.2 ~ 1.6 kgf.m, 8.7 ~ 11.6 lb-ft)
  7. Remove the bolt (3ea) after disconnecting the solenoid valve connector (B) and the oil temperature sensor connector (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft) CAUTION: Be careful not to damage the harness lock connector.
  8. Remove the valve body assembly (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  9. Disconnect the input & output speed sensor connector (A).
  10. Remove the input & output speed sensor (B) after removing the bolts (2ea). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Scheme 93

Scheme 93: Installation
Scheme 93: Installation
  1. Installation is the reverse of removal. NOTE: After replacement or reinstallation procedure of the valve body assembly, must perform procedures below. The gasket of the valve body gasket (A) use new one. Adding automatic transaxle fluid. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  1. Check signal waveform of Input & output speed sensor using the GDS. Specification: Refer to «Signal Waveform»(ref-536108-S18870464042013031400000) .

Scheme 94

Scheme 94: Removal
Scheme 94: Removal

Scheme 95

Scheme 95
Scheme 95

Scheme 96

Scheme 96
Scheme 96

Scheme 97

Scheme 97
Scheme 97

Scheme 98

Scheme 98
Scheme 98

Scheme 99

Scheme 99
Scheme 99
  1. Remove the battery and the battery tray. (Refer to " «CHARGING SYSTEM»(ref-536081) " in EE group.)
  2. Remove the under cover (A). Tightening torque: 6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)
  3. Replace new gasket and the plug after draining the automatic transaxle fluid by removing the drain plug. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  4. Remove the air breather hose (A).
  5. Remove the valve body cover (B). Tightening torque: 13.7 ~ 15.7 N.m (1.4 ~ 1.6 kgf.m, 10.8 ~ 11.6 lb-ft) CAUTION: Always replace the gasket of the eyebolt use new one whenever loosening eyebolt. NOTE: Remove installation bolts in the engine compartment first and then remove others under the vehicle.
  6. Remove the plate and the detent spring (A) after removing the bolt. Tightening torque: 11.8 ~ 15.7 N.m (1.2 ~ 1.6 kgf.m, 8.7 ~ 11.6 lb-ft)
  7. Remove the bolt (3ea) after disconnecting the solenoid valve connector (B) and the oil temperature sensor connector (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft) CAUTION: Be careful not to damage the harness lock connector.
  8. Remove the valve body assembly (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  9. Disconnect the input & output speed sensor connector (A).
  10. Remove the input & output speed sensor (B) after removing the bolts (2ea). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Scheme 100

Scheme 100: Installation
Scheme 100: Installation
  1. Installation is the reverse of removal. NOTE: After replacement or reinstallation procedure of the valve body assembly, must perform procedures below. The gasket of the valve body gasket (A) use new one. Adding automatic transaxle fluid. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.

Scheme 101

Scheme 101: Removal
Scheme 101: Removal

Scheme 102

Scheme 102
Scheme 102

Scheme 103

Scheme 103
Scheme 103

Scheme 104

Scheme 104
Scheme 104

Scheme 105

Scheme 105
Scheme 105
  1. Remove the battery and the battery tray. (Refer to " «CHARGING SYSTEM»(ref-536081) " in EE group.)
  2. Remove the under cover (A). Tightening torque: 6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)
  3. Replace new gasket and the plug after draining the automatic transaxle fluid by removing the drain plug. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  4. Remove the air breeder hose (A).
  5. Remove the valve body cover (B). Tightening torque: 13.7 ~ 15.7 N.m (1.4 ~ 1.6 kgf.m, 10.1 ~ 11.6 lb-ft)
  6. Remove the bolt (3ea) after disconnecting the solenoid valve connector (B) and the oil temperature sensor connector (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  7. Remove the solenoid valve support bracket (B) and the valve body mounting bolt (A-1ea). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  8. Remove the torque converter control solenoid valve (A).

Scheme 106

Scheme 106: Installation
Scheme 106: Installation
  1. Installation is the reverse of removal. NOTE: The gasket of the valve body gasket (A) use new one. Adding automatic transaxle fluid. (Refer to «FLUID»(ref-536106-S21760354932013031400000) . Perform TCM learning after replacing the automatic transaxle to prevent slow automatic transaxle response, jerky acceleration and jerky startup. (Refer to "Automatic transaxle control system ( «REPAIR PROCEDURES»(ref-536108-S17174924252013031400000) )" in this group)
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.

Scheme 107

Scheme 107: Removal
Scheme 107: Removal

Scheme 108

Scheme 108
Scheme 108

Scheme 109

Scheme 109
Scheme 109

Scheme 110

Scheme 110
Scheme 110
  1. Remove the battery and the battery tray. (Refer to " «CHARGING SYSTEM»(ref-536081) " in EE group.)
  2. Remove the under cover (A). Tightening torque: 6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)
  3. Replace new gasket and the plug after draining the automatic transaxle fluid by removing the drain plug. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  4. Remove the air breather hose (A).
  5. Remove the valve body cover (B). Tightening torque: 13.7 ~ 15.7 N.m (1.4 ~ 1.6 kgf.m, 10.1 ~ 11.6 lb-ft) CAUTION: Always replace the gasket of the eyebolt use new one whenever loosening eyebolt. NOTE: Remove installation bolts in the engin room first and then remove others under the vehicle.
  6. Remove the bolt (3ea) after disconnecting the solenoid valve connector (B) and the oil temperature sensor connector (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  7. Remove the solenoid valve (B) after removing the solenoid support (A).

Scheme 111

Scheme 111: Installation
Scheme 111: Installation

Scheme 112

Scheme 112
Scheme 112
  1. Installation is the reverse of removal. NOTE: When installing, apply the ATF oil or white Vaseline to the O-ring (A) not to be damaged. The gasket of the valve body gasket (A) use new one. Adding automatic transaxle fluid. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  1. Turn ignition switch OFF.
  2. Disconnect the solenoid valve connector.
  3. Measure resistance between sensor signal terminal and sensor ground terminal.
  4. Check that the resistance is within the specification.

Scheme 113

Scheme 113: Removal
Scheme 113: Removal

Scheme 114

Scheme 114
Scheme 114

Scheme 115

Scheme 115
Scheme 115

Scheme 116

Scheme 116
Scheme 116
  1. Remove the battery and the battery tray. (Refer to " «CHARGING SYSTEM»(ref-536081) " in EE group.)
  2. Remove the under cover (A). Tightening torque: 6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)
  3. Replace new gasket and the plug after draining the automatic transaxle fluid by removing the drain plug. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .
  4. Remove the valve body cover (A) and eyebolt (B). Tightening torque: 13.7 ~ 15.7 N.m (1.4 ~ 1.6 kgf.m, 10.1 ~ 11.6 lb-ft) CAUTION: Always replace the gasket of the eyebolt use new one whenever loosening eyebolt. NOTE: Remove installation bolts in the engin room first and then remove others under the vehicle.
  5. Remove the bolt (3ea) after disconnecting the solenoid valve connector (B) and the oil temperature sensor connector (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  6. Remove the solenoid valve (B) after removing the solenoid support (A).

Scheme 117

Scheme 117: Installation
Scheme 117: Installation

Scheme 118

Scheme 118
Scheme 118
  1. Installation is the reverse of removal. NOTE: When installing, apply the ATF oil or white Vaseline to the O-ring (A) not to be damaged. The gasket of the valve body gasket (A) use new one. Adding automatic transaxle fluid. (Refer to «FLUID»(ref-536106-S21760354932013031400000) .

More articles — Automatic Transaxle Control System