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PCM and Generator Shearing Inspection

  1. Connect the WDS or equivalent to the DLC-2.
  2. Inspect as follows:
    Fig 1: Locating DLC-2 Connector
    G04317682Courtesy of MAZDA MOTORS CORP.
PCM AND GENERATOR SHEARING INSPECTION TABLE

Step Inspection Action
1 Measure the generator terminal B voltage when the electrical loads (1) are on and off. 15 V or more Go to Step 2.
13-15 V Normal (2)
13 V or less Go to Step 3.
2 Monitor the ALTT V PID using the WDS or equivalent, or measure the voltage of PCM terminal 2AJ using a tester. Is the voltage between 13 and 15 V? Yes Go to Step 4.
No PCM input error.
3 Monitor the ALTT V PID using the WDS or equivalent, or measure the voltage of PCM terminal 2AJ using a tester. Is the voltage between 13 and 15 V? Yes Go to Step 5.
No PCM input error.
4 Monitor the ALTF PID using the WDS or equivalent, or calculate the duty value of the PCM terminal 2AI using an oscilloscope. Is the duty value 100%?
G04318014Courtesy of MAZDA MOTORS CORP.
 Yes PCM input error.
No PCM, generator, or both are not normal.
5 Monitor the ALTF PID using the WDS or equivalent, or calculate the duty value of the PCM terminal 2AI using an oscilloscope. Is the duty value 0%?
G04318015Courtesy of MAZDA MOTORS CORP.
 Yes PCM input error.
No PCM, generator, or both are not normal.
(1) Headlights, blower motor, rear window defroster, and brake light.
(2) If the generator field coil duty value does not change when electrical loads (such as headlights, blower motor, rear window defroster, brake light) are on or off, inspection with discharged battery is needed.
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