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Diagnostic Aids

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  1. 1) DTC 1667

    DTC P1667 indicates PCM has detected a failure on CID circuit. Possible causes for DTCs are:
    • Faulty Injector Driver Module (IDM).
    • Open or short in CID circuit.
    • Faulty Powertrain Control Module (PCM).

    Repeat KOEO SELF-TEST , retrieve Continuous Memory DTCs and perform the following:

    • If only DTC 1667 is present, go to next step.
    • If DTCs 1663 and 1667 are present, with or without DTC 1668, go to step  6).
    • If only DTC 1298 is present, replace IDM.
    • If DTC P1662 is also present, go to TEST W, step  1).

  2. 2) Check Voltage On CID Circuit (Yellow/Light Blue Wire)

    DTC 1667 indicates there is a short to power, short to ground or an open at CID circuit. Disconnect PCM 104-pin connector, and inspect for damaged pins, corrosion and loose wires. Repair as necessary. Install Breakout Box (014-00950). Connect PCM connector to breakout box. Turn ignition on. Measure voltage between ground and test pin No. 96 at breakout box. If voltage is .5-.7 volt, go to next step. If voltage is less than .5 volt, go to step  4). If voltage is more than 4 volts, go to step  5).

  3. 3) Perform KOEO Output State Self-Test

    Attach New Generation Star (NGS) scan tool. Turn ignition on. Using NGS tester, perform KOEO OUTPUT STATE SELF-TEST  under QUICK TEST. Measure voltage between ground and test pin No. 96 at breakout box. If voltage does not toggle between .5-.7 volt and 12 volts, replace PCM. Reconnect connectors. Clear DTCs, and repeat QUICK TEST . If voltage toggles between .5-.7 volt and 12 volts, fault is intermittent. Go to step  8).

  4. 4) Check For Open On CID Circuit (Yellow/Light Blue Wire)

    Turn ignition off. Disconnect PCM connector from breakout box. Disconnect IDM 40-pin connector. IDM is located in left side of engine compartment. Measure resistance between terminal No. 16 (Yellow/Light Blue wire) at IDM connector and test pin No. 96 at breakout box. If resistance is less than 5 ohms, go to step  6). If resistance is 5 ohms or more, locate and repair open circuit in Yellow/Light Blue wire. Reconnect connectors. Clear DTCs, and repeat QUICK TEST .

  5. 5) Check Yellow/Light Blue Wire For Short To Power

    Disconnect PCM from breakout box. Turn ignition on. Measure voltage between test Pin No. 96 and ground Pins No. 25, 51, 76, 77, 91 and 103 at breakout box. If battery voltage is present, locate and repair short to power in Yellow/Light Blue wire. Reconnect connectors. Clear DTCs, and repeat QUICK TEST . If battery voltage is not present, go to step  7).

  6. 6) Check Yellow/Light Blue Wire For Short To Ground

    Turn ignition off. Measure resistance between test pin No. 96 and test pins No. 25, 51, 76, 77 and 103 at breakout box. If all readings are more than 10 k/ohms, go to next step. If any reading is 10 k/ohms or less, locate and repair short to ground in Yellow/Light Blue wire. Reconnect connectors. Clear DTCs, and repeat QUICK TEST .

  7. 7) Check PCM Output State Function

    Turn ignition off. Connect PCM connector to breakout box. Install New Generation Star (NGS) scan tool to DLC. Turn ignition on. Using NGS tester, perform KOEO OUTPUT STATE SELF-TEST  under QUICK TEST. Measure voltage between test pin No. 96 and test pins No. 25, 51, 76, 77 and 103 at breakout box while depressing and releasing accelerator pedal. If voltage does not toggle between .5-.7 volt and zero volt, replace PCM. Reconnect connectors. Clear DTCs, and repeat QUICK TEST . If voltage toggles between .5-.7 volt and zero volts, replace IDM. Reconnect connectors. Clear DTCs, and repeat QUICK TEST.

  8. 8) Check For Intermittent

    Reconnect connectors. Clear DTCs. Perform KOEO SELF-TEST  under QUICK TEST. If DTC 1663 is reset, replace PCM. Reconnect connectors. Clear DTCs, and repeat QUICK TEST . If DTC 1663 is not reset, no problem is indicated at this time. Reconnect connectors. Clear DTCs, and repeat QUICK TEST .

  9. 9) DTC P1218

    Turn ignition on. Repeat KOEO SELF-TEST  and perform the following:
    • If DTC 1218 was present without 1667, go to next step.
    • IF DTCs 1663, 1667 and 1668 are also present with DTC P1218, go to TEST U, step  6).
    • If DTC 1667 is present with 1218, go to step  2).
    • If DTC 1298 is also present, REPLACE IDM.
    • If DTC 1662 is also present, Go to TEST W, step  1).

  10. 10) Check For Intermittent Open On CID Circuit (Yellow/Light Blue Wire)

    Turn ignition off. Install breakout box, leave PCM disconnected. Disconnect IDM connector. Check for intermittent open on CID circuit. Measure resistance of Yellow/Light Blue wire between IDM harness connector terminal No. 16 and breakout box test Pin No. 96. Grasp harness close to IDM connector. Wiggle and shake harness while working your way back to PCM connector, while looking for a spike on DVOM. If resistance stays less than 5 ohms throughout procedure, go to next step. If resistance jumps to 5 ohms or more during procedure, repair open in Yellow/Light Blue wire. Reconnect connectors. Clear DTCs, and repeat QUICK TEST .

  11. 11) Check For Intermittent Short To Power On CID Circuit (Yellow/Light Blue Wire)

    Turn ignition on. Measure voltage between test Pin No. 96 and ground Pins No. 25, 51, 76, 77, 91 and 103 at breakout box. Grasp harness close to IDM connector. Wiggle and shake harness while working your way back to PCM connector, while looking for a spike on DVOM. If a voltage reading suddenly appears during wiggle test, repair short to power in Yellow/Light Blue wire. Reconnect connectors. Clear DTCs, and repeat QUICK TEST . If voltage does not appear during wiggle test, reconnect connectors. Clear DTCs. Road test vehicle, and repeat QUICK TEST . If DTC reappears, replace IDM.

  12. 12) DTC P1219

    Turn ignition on. Repeat KOEO SELF-TEST  and perform the following:
    • If DTC 1219 was present without 1667, go to next step.
    • IF DTCs 1663, 1667 and 1668 are also present with DTC P1219, go to TEST U, step  6).
    • If DTC 1667 is present with 1219, go to step  2).
    • If DTC 1298 is also present, REPLACE IDM. Reconnect connectors. Clear DTCs, and repeat QUICK TEST .
    • If DTC 1662 is also present, Go to TEST W, step  1).

  13. 13) Check For Intermittent Short To Ground On CID Circuit (Yellow/Light Blue Wire)

    Turn ignition off. Install breakout box, leave PCM disconnected. Disconnect IDM connector. Measure resistance between test Pin No. 96 and ground Pins No. 25, 51, 76, 77, 91 and 103 at breakout box. Grasp harness close to IDM connector. Wiggle and shake harness while working your way back to PCM connector, while looking for a spike on DVOM. If resistance changes to less than 10 k/ohms during wiggle test, repair short to ground in Yellow/Light Blue wire. Reconnect connectors. Clear DTCs, and repeat QUICK TEST . If resistance is 10 k/ohms or more during wiggle test, reconnect connectors. Clear DTCs. Road test vehicle, and repeat QUICK TEST . If DTC reappears, replace IDM. Reconnect connectors. Clear DTCs, and repeat QUICK TEST .
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