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HOMESERVICE MANUALSSATURN2003ION 3 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 5 (AUTOMATIC TRANSMISSION - VT25-E)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P0604: TRANSMISSION CONTROL MODULE (TCM) RANDOM ACCESS MEMORY (RAM)ACTION TAKEN WHEN THE DTC SETS
2003 Saturn Ion 3 4D Sedan, Standard

Action Taken When the DTC Sets

2003 Saturn Ion 3 4D Sedan, StandardSECTION Action Taken When the DTC Sets
WARNING: This page is about a different variant/trim than selected.
  • The TCM requests the ECM to illuminate the malfunction indicator lamp (MIL).
  • The TCM freezes all ratio control functions, including the ratio control motor and desired speed ratio.
  • The TCM discontinues use of the closed loop ratio control algorithm. This causes the speed ratio to be defaulted and possibly not accurate. The resulting open loop control may or may not provide optimum ratio performance.
  • The TCM inhibits TCC engagement.
  • The TCM commands maximum line pressure.
  • The TCM no longer inhibits shifting to between reverse and drive when moving.
  • The TCM turns power off to the TCC enable solenoid valve.
  • The TCM discontinues torque management.
  • The TCM freezes garage shift transmission adaptive functions.
  • The TCM freezes main line pressure transmission adaptive functions.
  • The TCM freezes torque converter clutch (TCC) transmission adaptive functions.
  • The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as Freeze Frame and Failure Records.
  • The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
  • The TCM stores DTC P0604 in TCM history.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.