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PCM And Generator Shearing Inspection

  1. Connect the M-MDS to the DLC-2.
  2. Inspect as follows:
    Fig 1: Identifying DLC-2 Connector
    G05981076Courtesy of ABLE BODY CORP.
GENERATOR DIAGNOSIS CHART

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 M-MDS, (See ON-BOARD DIAGNOSTIC TEST [13B-MSP] .) or measure the PCM 2AJ terminal waveform using an oscilloscope. (See PCM INSPECTION [13B-MSP] .)
Is the value normal?
Yes Go to Step 4.
No PCM input error.
3 Monitor the ALTT V PID using the M-MDS, (See ON-BOARD DIAGNOSTIC TEST [13B-MSP] .) or measure the PCM 2AJ terminal waveform using an oscilloscope. (See PCM INSPECTION [13B-MSP] .)
Is the value normal?
Yes Go to Step 5.
No PCM input error.
4 Monitor the ALTF PID using the M-MDS, or calculate the duty value of the PCM terminal 2AI using an oscilloscope. Is the duty value 100%?
G05981077Courtesy of ABLE BODY CORP.
Yes PCM input error.
No PCM, generator, or both are not normal.
5 Monitor the ALTF PID using the M-MDS, or calculate the duty value of the PCM terminal 2AI using an oscilloscope. Is the duty value 0%?
G05981078Courtesy of ABLE BODY CORP.
Yes PCM input error.
No PCM, generator, or both are not normal.
(1) Headlights, blower motor, rear window defroster, brake lights, etc.
(2) If the generator field coil duty value does not change when electrical loads (such as headlights, blower motor, rear window defroster, brake lights) are on or off, inspection with discharged battery is needed.