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July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Starter Relay Circuit Test

  1. The relay common feed terminal cavity (30) is connected to battery voltage and should be hot at all times. If OK, go to Step  2. If not OK, repair the open circuit to the PDC fuse as required.
  2. The relay normally closed terminal (87A) is connected to terminal 30 in the de-energized position, but is not used for this application. Go to Step  3.
  3. The relay normally open terminal (87) is connected to the common feed terminal (30) in the energized position. This terminal supplies battery voltage to the starter solenoid field coils. There should be continuity between the cavity for relay terminal 87 and the starter solenoid terminal at all times. If OK, go to Step  4. If not OK, repair the open circuit to the starter solenoid as required.
  4. The coil battery terminal (86) is connected to the electromagnet in the relay. It is energized when the ignition switch is held in the Start position. Check for battery voltage at the cavity for relay terminal 86 with the ignition switch in the Start position, and no voltage when the ignition switch is released to the On position. If OK, go to Step  5. If not OK, check for an open or short circuit to the ignition switch and repair, if required. If the circuit to the ignition switch is OK, test ignition switch.
  5. The coil ground terminal (85) is connected to the electromagnet in the relay. The relay is grounded through Pin 8 of the PCM, when the gear selector lever is in the Park or Neutral position. Check for continuity to ground at the cavity for relay terminal 85, when the gear selector lever is in the Park or Neutral position. If not OK, check for an open circuit to Pin 8 of the PCM and from Pin 76 of the PCM to transmission range sensor. Repair as necessary. If both circuits are OK, refer to the Transmission Range Sensor Test in DIAGNOSIS - 42LE article. If the Transmission Range Sensor test OK, and all other tests are OK, replace the PCM.
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