Mazda Trucks 1994-1998 Repair Guide

Ignition Control Module (ICM)

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REMOVAL & INSTALLATION



Navajo and B Series Pick-up Models
REMOTE MOUNTED MODULE

See Figure 1



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Fig. Fig. 1: View of the remote mounted Ignition Control Module (ICM)

  1. Disconnect the negative battery cable.
  2.  
  3. Label and detach all wiring from the ICM.
  4.  
  5. Remove the ICM/heatsink-to-fender apron bolts, then remove the ICM/heatsink.
  6.  
  7. If necessary, at this time the ICM can be removed from the heat sink.
  8.  

To install:
  1. Apply an approximately 1 / 32in. (0.80mm) thick layer of silicone dielectric compound (D7AZ-19A331-A or equivalent) to the base plate of the ICM. /
  2.  
  3. Install the ICM onto the heat sink. Tighten the mounting bolts to 15-35 inch lbs. (1.7-4.0 Nm).
  4.  
  5. Position the ICM onto the right-hand, front fender apron, then install and tighten the mounting bolts to 90-120 inch lbs. (10-14 Nm).
  6.  
  7. Attach all wiring to the ICM, then connect the negative battery cable.
  8.  

DISTRIBUTOR MOUNTED MODULE
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the distributor assembly from the engine.
  4.  
  5. Place the distributor on the workbench and remove the module retaining screws. Pull the right side of the module down the distributor mounting flange and back up to disengage the module terminal from the connector in the distributor base. The module may be pulled toward the flange and away from the distributor.
  6.  

Do not attempt to lift the module from the mounting surface, except as explained above. The pins will break at the distributor module connector.

To install:
  1. Coat the base plate of the TFI ignition module uniformly with 1 / 32 inch of silicone dielectric compound WA-10 or equivalent.
  2.  
  3. Position the module on the distributor base mounting flange. Carefully position the module toward the distributor bowl and engage the three connector pins securely.
  4.  
  5. Install the retaining screws. Tighten to 15-35 inch lbs (1.7-4.0 Nm), starting with the upper right screw.
  6.  
  7. Install the distributor into the engine. Install the cap and wires.
  8.  
  9. Reconnect the negative battery cable.
  10.  
  11. Recheck the initial timing. Adjust if necessary.
  12.  

MPV Models
1994-95

The ignition control module is mounted on the same bracket as the ignition coil and is located on the left side strut tower in the engine compartment.

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the wiring harness from the ignition control module.
  4.  
  5. Remove the 2 ignition control module mounting fasteners.
  6.  
  7. Remove the ignition control module from the vehicle.
  8.  
  9. Install in reverse order.
  10.  

1996-98

The ignition control module on 1996-98 MPV models is an integral component of the distributor and cannot be serviced separately. If ignition control module service is required, the distributor must be replaced.

 
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