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HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 21 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES)IGNITION CHECKSIGNITION COIL CIRCUIT TESTINGMDX, 3.2CL & 3.2TL
2004 Acura 3.5RL

MDX, 3.2CL & 3.2TL

2004 Acura 3.5RLSECTION MDX, 3.2CL & 3.2TL
WARNING: This page is about a different car, the 2002 Acura MDX, 2002 Acura 3.5RL, 2002 Acura 3.2TL, and 2002 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove ignition coil cover. Disconnect 6 ignition coil 3-pin connectors. Turn ignition on. Measure voltage between ground and each ignition coil connector terminal No. 3 (Black/Yellow wire). See WIRING DIAGRAMS article. If battery voltage is present, go to next step. If battery voltage is not present, repair open circuit in Black/Yellow wire between ignition coil and No. 11 (15-amp) fuse located in underdash fuse/relay box.
  2. Turn ignition off. Measure continuity between ignition coil 3-pin connector terminal No. 2 (Black wire) and ground. If continuity is present, go to next step. If continuity is present, repair open circuit in Black wire between ignition coil and ground.
  3. Disconnect PCM 31-pin connector. Measure continuity between PCM 31-pin connector terminals and ground. See PCM 31-PIN CONNECTOR TERMINAL IDENTIFICATION (MDX, 3.2CL & 3.2TL)  table. If continuity is present between designated PCM connector terminal and ground, repair short circuit in appropriate wire between ignition coil and PCM. If continuity is not present, go to next step.
    PCM 31-PIN CONNECTOR TERMINAL IDENTIFICATION (MDX, 3.2CL & 3.2TL)

    Connector Terminal Wire Color
    No. 3 White/Blue
    No. 4 Yellow/Green
    No. 12 Black/Red
    No. 13 Brown
    No. 14 Blue/Red
    No. 23 Brown/White
  4. Reconnect PCM 31-pin connector. Turn ignition switch to START position. Measure voltage between ignition coil 3-pin connectors terminal No. 1 and ground. See IGNITION COIL 3-PIN CONNECTOR TERMINAL NO. 1 IDENTIFICATION (MDX, 3.2CL & 3.2TL)  table. If about .5 volt is present, replace ignition coil. If about .5 volt is not present, repair open circuit in appropriate wire between ignition coil connector terminal No. 1 and PCM.
    IGNITION COIL 3-PIN CONNECTOR TERMINAL NO. 1 IDENTIFICATION (MDX, 3.2CL & 3.2TL)

    Ignition Coil Wire Color
    No. 1 Yellow/Green
    No. 2 Blue/Red
    No. 3 White/Blue
    No. 4 Brown
    No. 5 Black/Red
    No. 6 Brown/White
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.