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Home >> Hyundai >> 2005 >> Elantra GT, 4D Hatchback, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System >> Inspection Procedures For Diagnostic Trouble Codes >> DTC P1723: A/T Control Relay >> Inspection Procedures

Inspection Procedures

  1. CHECK THE DTC OF THE A/T CONTROL RELAY 
    1. Connect Hi-Scan (pro) to data link connector.
    2. Turn the ignition switch ON and monitor the DTC.

    Is the DTC P1723 the output? 

    Yes:  Go to next step.

    No:  Problem is intermittent. Proceed with intermittent problem procedure (See symptoms).

  2. CHECK THE A/T CONTROL RELAY CONNECTOR 
    1. Turn the ignition switch OFF and disconnect the A/T control relay connector.
    2. Check that the A/T control relay connector for loose, poor connection, bent, corrosion, contamination, deterioration, or damage.

    Is the A/T control relay connector normal? 

    Yes:  Go to next step.

    No:  Repair or replace as necessary.

  3. CHECK THE A/T CONTROL RELAY CONTINUITY 
    1. Remove the A/T control relay.
    2. Use jumper wires to connect A/T control relay terminal (2) to the battery (+) terminal and terminal (4) to the battery (-) terminal.
    3. Check for continuity between terminal (1) and terminal (3) of the A/T control relay when the jumper wires are connected to and disconnected from the battery.
    A/T CONTROL RELAY CONTINUITY CHART

    Jumper wire Continuity between terminals No. 1 & 3
    Connected Continuity
    Disconnected No continuity

    Is there continuity? 

    Fig 1: Checking A/T Control Relay Continuity
    G03843123Courtesy of HYUNDAI MOTOR CO.

    Yes:  Go to next step.

    No:  Replace the A/T control relay.

  4. CHECK THE A/T CONTROL RELAY HARNESS 
    1. Turn the ignition switch OFF and disconnect the A/T control relay connector.
    2. Turn the ignition switch ON.
    3. Measure the voltage between the A/T control relay connector terminal 1 and terminal 2.

    Is there battery voltage? 

    Fig 2: Measuring Voltage Between A/T Control Relay Connector Terminals 1 And 2
    G03843124Courtesy of HYUNDAI MOTOR CO.

    Yes:  Go to next step.

    No:  Repair or replace as necessary.

  5. CHECK THE A/T CONTROL RELAY HARNESS 
    1. Turn the ignition switch OFF and disconnect the A/T control relay connector and PCM connector.
    2. Check the continuity between the A/T control relay connector terminal 3 and the PCM harness connector terminal 36.
    3. Check the continuity between the A/T control relay connector terminal 4 and the PCM harness connector terminal 32.

    Is there continuity? 

    Fig 3: Checking Continuity Between A/T Control Relay Connector Terminal 4 And PCM Harness Connector Terminal 32
    G03843125Courtesy of HYUNDAI MOTOR CO.

    Yes:  Go to next step.

    No:  Repair or replace as necessary.

  6. REPLACE THE A/T CONTROL RELAY 
  7. Use the Hi-Scan Pro to delete P1723 from memory in the PCM. Test drive the vehicle for two key-on the key-off driving cycles. 

    Does P1723 reset? 

    Yes:  Go to next step.

  8. REPLACE THE PCM 
    1. Disconnect the battery (-) terminal and disconnect the PCM connector.
    2. Replace the PCM.
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