P0606

CIRCUIT DESCRIPTION

The PCM has two internal processors: the E and the T side. They are connected together and share data on an interconnect called the SPI. The E side sends sensor data to the T side. This sensor data is checked and if the difference in readings between the two processors is too great, DTC P0606 will set.

CONDITIONS FOR SETTING THE DTC

Test Conditions

^ Valid SPI data is being received.
^ Ignition voltage is greater than 10 volts.
^ Ignition on for 5 seconds.

Failure Condition

MAP, ECT or Throttle Position Sensor (TPS) data varies between E side and T side.

ACTION TAKEN WHEN THE DTC SETS

^ The PCM will illuminate the Malfunction Indicator Lamp (MIL) when the diagnostic runs and fails.
^ The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC

^ The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
^ A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
^ A History DTC will clear after forty consecutive warm-up cycles with no failures of any emission related diagnostic test.
^ PCM battery voltage is interrupted.
^ Using a Scan tool.

TEST DESCRIPTION

Number(s) below refer to the step number(s) on the Diagnostic Table.

2. This DTC indicates an internal PCM problem.