WARNING: This page is about a different car, the 1994 Mazda Navajo and 1994 Mazda B4000. However, it is still accessible from the selected car via links, so may be relevant.

Turn key off. Connect ICM Diagnostic Cable (007-00059) to Breakout Box (T83L-50-EEC-IV), ICM and coil pack. DO NOT connect crankshaft Variable Reluctance Sensor (VRS) tee. See Fig 1 . Use ICM No. 6 overlay.

Fig 1: Installing ICM Diagnostic Cable (B4000 & Navajo)
Courtesy of MAZDA MOTORS CORP.
Connect ICM diagnostic cable negative lead to battery, leaving positive lead disconnected. Set ICM diagnostic cable box to 4/6 CYLINDER position. Connect LED test light leads between breakout box pins No. J43 (PIP E) and J7 (ground). Crank engine. If LED test light blinks, go to step 3). If test light does not blink, go to ISOLATE ICM/PIP FAULT.
Turn key off. Disconnect PCM. Check continuity of PIP and Ignition Ground (IGND) wires between ICM and PCM. See Figure . If any problems are found, repair circuits and components. Clear Continuous Memory, and run QUICK TEST in appropriate G - TESTS W/ CODES article in the ENGINE PERFORMANCE section below. If continuity is present and wires are not shorted or open, replace ICM.
- TESTS W/CODES (for B4000)
- TESTS W/CODES (for Navajo)

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.

Safety Warning

Check Profile Ignition Pickup (PIP) At ICM

Use the Manual With the Right Hardware

When to See a Mechanic

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