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Home >> Chrysler >> 1989 >> LeBaron Base, 4D Hatchback, 2.2 D, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 2.2L Turbo Tests W/Codes >> DRIVEABILITY Tests >> Dr-1 - Checking System For Fault Codes

Dr-1 - Checking System For Fault Codes

  1. Connect DRB-II. Put system in Diagnostic Test Mode. Record all codes. If "88-12-55" (no fault codes) is displayed, go to DR-2  . For following fault codes, proceed to specified tests:
    • Code 15 - Speed sensor, go to DR-3  .
    • Code 17 - Coolant sensor, go to DR-5  .
    • Code 21 - Oxygen sensor, go to DR-4  .
    • Code 33 - A/C cut-out relay, go to DR-10  . This code will be displayed if vehicle is not equipped with A/C.
    • Code 51 - Oxygen feedback system locked lean, go to DR-18  .
    • Code 52 - Oxygen feedback system locked rich, go to DR-18  .
  2. Erase fault codes. Without depressing accelerator, start engine. Raise engine speed to 2000 RPM for 10 seconds and then return to idle. Cycle transmission gear selector. Turn A/C on and off (if equipped).
  3. Turn ignition off. Put system into Diagnostic Test Mode. Record all codes. If the same code appears before and after the engine is started, the problem still exists. Proceed as follows:
    • Code 12 - No fault codes, go to step 4).
    • Code 13-14 - MAP sensor, go to DR-2  .
    • Code 15 - Speed sensor, go to DR-3  .
    • Code 16 - Battery voltage sense, SMEC memory circuit. Go to CHARGING SYSTEM  TEST, NO. 3.
    • Code 17 - Engine running too cool, check engine cooling system.
    • Code 21 - Oxygen sensor, go to DR-4  .
    • Code 22 - Engine coolant sensor, go to DR-5  .
    • Code 17-22 - Engine coolant sensor, go to DR-5  .
    • Code 23 - Charge temperature sensor, go to DR-6  .
    • Code 24 - Throttle position sensor, go to DR-7  .
    • Code 25 - AIS motor, go to DR-8  .
    • Code 26 - Injector driver, go to NS-9  .
    • Code 27 - Injector interface, go to NS-9  .
    • Code 31 - Canister purge solenoid, go to DR-9  .
    • Code 33 - A/C cut-out relay, go to DR-10  . This code will display on vehicles without A/C.
    • Code 35 - Radiator fan relay, go to DR-11  .
    • Code 36 - Wastegate solenoid, go to DR-12  .
    • Code 37 - Baro read solenoid, go to DR-13  .
    • Code 42 - ASD relay, repair wire in SMEC 60-pin connector, cavity No. 10 for an open circuit.
    • Code 44 - Fused J2 circuit, go to DR-14  .
    • Code 45 - Overboost shutdown, go to DR-15  .
    • Code 51 - Oxygen feedback system locked lean, go to DR-18  .
    • Code 52 - Oxygen feedback system locked rich, go to DR-18  .
    • Code 53 - Replace SMEC.
      NOTE: If code does not reappear, problem is not recorded, go to step 19).
  4. With DRB-II connected, enter Actuator Test Mode (ATM). Perform the following tests:

    Actuator Test "04"  - The radiator fan should be cycling on/off every 2 seconds. If fan cycles, press and hold ATM key until code "07" (equipped with A/C) or code "05" (without A/C) appears. If fan is not on, check fan relay. If relay clicks, repair wiring to fan. If relay does not click, replace relay.

    Actuator Test "05"  - The A/C cut-out relay should click, every 2 seconds. Replace relay if it does not click. If relay clicks, hold ATM key until code "07" appears.

    Actuator Test "07"  - Listen for clicking from canister purge solenoid. Replace solenoid if it does not click. If relay clicks, hold ATM key until code "10" appears.

    Actuator Test "10"  - Baro read solenoid should be clicking. If solenoid is not clicking, replace baro read solenoid. If solenoid clicks, hold ATM key until code "11" appears.

    Actuator Test "11"  - Wastegate solenoid should be clicking. If solenoid clicks, go to next step. If solenoid does not click, replace it. 66.

  5. With DRB-II connected, enter Switch Test Mode. Check switch inputs as follows:
    • Depress brake pedal.
    • Move gear selector from Park, to Reverse, Neutral and Drive.
    • With A/C on, turn blower on and press A/C button.

    DRB-II display should change as each switch is activated. Disregard what is displayed, ensure only that a change in display occurs. If switch inputs are okay, go to step 10). If one or all of the switches do not pass, proceed to the following tests:

    • Brake switch w/o speed control, go to next step.
    • Brake switch with speed control, go to step 7).
    • Park/Neutral switch, go to step 8).
    • A/C button, go to step 9).

  6. With ignition off, disconnect 60-pin connector from SMEC. Connect a voltmeter to White/Pink wire in connector cavity No. 29. Turn ignition switch to "RUN" position. Depress brake pedal. If voltmeter shows within one volt of battery voltage, replace SMEC for a defective logic board. If voltmeter reads zero volts, check brake switch, switch circuits and voltage supply.
    Fig 1: Testing Pin 29 of the 60-Pin Connector
    G55962
  7. With ignition off, disconnect 60-pin connector from SMEC. Connect ohmmeter between White/Pink wire in connector cavity No. 29 and ground. Depress and release brake pedal. If ohmmeter shows an open when pedal is depressed and has continuity when pedal is released, replace SMEC for a defective logic board. If ohmmeter does not read as described above, check brake switch, switch circuits and stoplight bulbs.
  8. With ignition off, disconnect 60-pin connector from SMEC. Connect ohmmeter between Brown/Yellow wire in connector cavity No. 30 and ground. Disconnect the battery quick disconnect. Turn ignition switch to "RUN" position. Shift gear selector to Park, Reverse, Neutral, and Drive positions and check ohmmeter readings in each position. If ohmmeter shows continuity or an open circuit in each position, check for defective Neutral Safety Switch (NSS) or short to ground in Brown/Yellow wire in connector cavity No. 30. If ohmmeter shows an open circuit in all positions, repair Brown/Yellow wire in connector cavity No. 30 or replace NSS. If the ohmmeter reads as follows, replace SMEC for a defective logic board:
    • Park - Continuity
    • Reverse - Open
    • Neutral - Continuity
    • Drive - Open
  9. With ignition off, disconnect 60-pin connector from SMEC. Connect ohmmeter between Brown wire in connector cavity No. 45 and ground. Turn blower switch on, press A/C button and then press "OFF" button. If ohmmeter shows continuity when A/C button is pressed, and open when blower motor switch is turned off, replace SMEC for a defective logic board. If ohmmeter reading is not as specified, repair Brown wire in connector cavity No. 45 for an open or short to wiring harness splice.
    NOTE: A/C system must have adequate freon charge to complete this test.
  10. With ignition on, disconnect MAP sensor electrical connector. Connect a DVOM to Voilet/White wire of MAP sensor harness connector and ground. If DVOM reading is at least 4 volts, go to next step. If DVOM reading is zero volts, repair Voilet/White wire for an open circuit to harness splice.
  11. Connect DRB-II, ensure "READ" is displayed. Reconnect MAP sensor connector. Connect a tachometer to engine. Start engine and disconnect coolant sensor. Press Read/Hold key and display "HOLD". Record engine RPM. Press key and display "READ". If engine speed increases to about 1500 RPM on "HOLD" and returns to idle on "READ", go to step 16). If engine speed does not increase and decrease as described, go to next step.
  12. With DRB-II connected, disconnect AIS motor connector. Enter ATM "03". Connect a voltmeter between Brown/White wire in cavity No. 2 and Yellow/Black wire in cavity No. 3 of AIS motor connector. If voltmeter is pulsating every 4 seconds, go to next step. If voltmeter does not pulsate, go to step 15).
  13. With ignition off and DRB-II connected, disconnect AIS motor connector. Connect a voltmeter between Gray/Red wire and Voilet/Black wire of AIS motor connector. Enter ATM Test "03". If voltmeter is pulsating between 0-12 volts every 2 seconds, replace AIS motor. Before replacing AIS motor, check terminals of connector for damage causing a poor connection. If voltmeter does not pulsate, go to next step.
    Fig 2: Testing AIS Motor Harness Pins 19 & 20 at the 60-Pin Connector
    G55964
  14. With ignition off, connect AIS motor connector. Disconnect 60-pin connector from SMEC. Connect ohmmeter between Gray/Red wire in cavity No. 19 and Voilet/Black wire in cavity No. 20. If ohmmeter is reading continuity, replace SMEC for a defective logic board. Before replacing SMEC, check terminals for damage causing a poor connection. If ohmmeter is not reading continuity, repair Gray/Red or Voilet/Black wires for an open circuit to AIS motor connector.
  15. With ignition off, disconnect 60-pin connector from SMEC. Ensure AIS motor is connected. Connect ohmmeter between Brown/White wire in connector cavity No. 17 and Yellow/Black wire in connector cavity No. 18. If ohmmeter shows continuity, replace SMEC for a defective logic board. If circuit is open, repair open in Brown/White or Yellow/Black wires.
    Fig 3: Testing AIS Motor Harness Pins 17 & 18 at the 60-Pin Connector
    G55965
  16. With DRB-II connected, disconnect all 4 injector connectors. Enter ATM "02". Connect and disconnect each injector one at a time. When an injector is connected you should hear it click. If injectors click, go to next step. If any injector does not click, replace injector.
  17. Disconnect DRB-II from vehicle. With ignition off, disconnect both SMEC connectors. Connect one lead of ohmmeter to ground. Connect other lead to the following circuits, and test resistance:
    • 14-Pin Connector Black/White wire in connector cavity No. 2. Black wire in connector cavities No. 6 and 7.
    • 60-Pin Connector Black/White wire in connector cavity No. 5. Light Blue/Red wire in connector cavities No. 15 and 16.
    Fig 4: Testing Injector Harness at the 60-Pin & 14-Pin Connectors
    G55966
  18. If the ohmmeter displays less than .5 ohm resistance at all cavities, proceed to DR-16  (cold engine driveability problems) or DR-18  (warm engine driveability problems). If ohmmeter reading indicates an open in one or more of the connector cavities, check for an open ground circuit and replace SMEC. If ohmmeter indicates a resistance greater than .5 ohm, repair faulty ground connection.
  19. The majority of intermittent failures are caused by wiring and connections. One way to find them is to duplicate the problem. Since the SMEC can remember where they are, the ATM and Sensor Tests can be used in an attempt to locate them. Once in the correct test mode, wiggle all connectors and wires in the circuit. The DRB-II display will change, or ATM test will be interrupted when the bad connection or wire is located. When checking the MAP sensor circuit (Code 14), apply 10 inches of vacuum to MAP sensor before testing. If the following codes do not reappear, go to the indicated test:

    Sensor Tests

    • Code 14 - Sensor Test "08"
    • Code 22 - Sensor Test "04"
    • Code 23 - Sensor Test "03"
    • Code 24 - Sensor Test "05"

ATM Tests

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