DD15 SPN 164/FMI 1 Troubleshooting

SPN 164/FMI 1

SPN 164/FMI 1 indicates a Quantity Control Valve Low Side driver error. This condition can occur when:‪

  • MCM pin 2 circuit is shorted to power
  • Internal short of the Quantity Control Valve

Check as follows:‪

  1. Disconnect the Quantity Control Valve harness connector.
  2. Ensure the multi meter (DVOM) resistance is zero.
    1. If meter can auto zero, perform this function before making a resistance measurement
    2. If meter can not auto zero, note the resistance of the leads and subtract it from the measurement taken in step 3
  3. Measure the resistance across pins 1 and 2 of the Quantity Control Valve.
    1. If the resistance is less than 1.3 Ω, replace Quantity Control Valve. Refer to “31.2.1 Verify Repairs” .
    2. If the resistance is between 1.3 Ω and 1.4 Ω, go to the next step.
  4. Disconnect the 120-pin MCM connector and check for corroded, bent or broken pins. Ensure both the MCM and harness connector pins are checked. Repair or replace if needed
  5. Turn ignition ON.
  6. Measure the voltage at pin 2 of the Quantity Control Valve harness connector.
    1. If the voltage is 0, replace the MCM. Refer to “31.2.1 Verify Repairs” .
    2. If the voltage is greater than 0, repair the short circuit between pin 2 of the Quantity Control Valve harness connector and battery.

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