2003 Acura 3.2CL BaseFACTORY OEM SERVICE PROCEDURE

Ignition Coil Circuit Testing: RSX

  1. Remove ignition coil cover. Disconnect 4 ignition coil 3-pin connectors. Turn ignition on. Measure voltage between ground and each ignition coil connector terminal No. 3 (Black/Yellow wire). See appropriate wiring diagram under ENGINE PERFORMANCE in WIRING DIAGRAMS. 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. 1 IGN COIL (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 ECM/PCM 31-pin connector. Measure continuity between appropriate ECM/PCM 31-pin connector terminal and ground. See PCM 31-PIN CONNECTOR TERMINAL IDENTIFICATION (RSX)  . If continuity is present between designated PCM connector terminal and ground, repair short circuit in wire between ignition coil and ECM/PCM. If continuity is not present, go to next step.
    PCM 31-PIN CONNECTOR TERMINAL IDENTIFICATION (RSX)

    Connector Terminal No. Wire Color
    27 Brown
    28 White/Blue
    29 Blue/Red
    30 Yellow/Green
  4. Reconnect PCM 31-pin connector. Turn ignition switch to START position. Measure voltage between appropriate ignition coil 3-pin connector terminal No. 1 and ground. See IGNITION COIL 3-PIN CONNECTOR TERMINAL NO. 1 IDENTIFICATION (RSX)  . 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 ECM/PCM.
    IGNITION COIL 3-PIN CONNECTOR TERMINAL NO. 1 IDENTIFICATION (RSX)

    Ignition Coil Wire Color
    No. 1 Yellow/Green
    No. 2 Blue/Red
    No. 3 White/Blue
    No. 4 Brown
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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.

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