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Ground Circuits

  1. Disconnect PCM connectors. Using an ohmmeter, check for continuity to ground on PCM harness ground terminals. See PCM GROUND CIRCUIT TERMINALS  table. Resistance should be zero ohms. If not, locate and repair open in wire.
    PCM GROUND CIRCUIT TERMINALS

    Vehicle PCM Connector Terminal No.
    Passport, Rodeo & Rodeo Sport (2.2L) & VehiCROSS (3.5L) White C8
    Passport, Rodeo & Rodeo Sport (3.2L) & Trooper (3.5L) Blue F1
    .... Blue F40
    .... Red S1
    .... Red S23
    .... Red S40
    .... White C9
    VehiCROSS (3.5L) White C7
  2. Reconnect PCM connectors. Using a voltmeter, connect negative lead of voltmeter to a good ground. Backprobe positive lead of voltmeter to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If voltmeter reading is greater than one volt, check for open, short, corrosion or loose connection on ground circuit. Repair as necessary.
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