Power Solutions, Inc.

634

UnclassifiedStarting

What This Code Means

TPS 2 Signal Voltage Low; DST displays TPS 2 voltage of 0.2 volts or less with throttle closed; TPS 2 voltage falls below 0.2 volts while depressing foot pedal

Possible Causes

  • •Damage, corrosion, or contamination in electronic throttle wire harness connector and terminals
  • •Faulty ECM
  • •Faulty electronic throttle
  • •Intermittent problem
  • •Lack of continuity in electronic throttle TPS 2 signal circuit between pin 5 and ECM pin 54
  • •TPS 2 sensor voltage less than 0.2

Suggested Actions

  1. 1Check continuity between electronic throttle TPS 2 signal pin 5 and ECM connector TPS 2 signal pin 54 using a DVOM
  2. 2Connect Diagnostic Scan Tool (DST) in DBW (Drive by Wire) throttle test mode and check TPS 2 voltage
  3. 3Inspect electronic throttle wire harness connector and terminals for damage, corrosion, or contamination
  4. 4Jumper 5 volt reference circuit pin 3 and TPS 2 signal pin 5 together at throttle connector and check voltage
  5. 5Perform On-Board (OBD) System Check
  6. 6Repair circuit as necessary referring to Wiring Repairs in Engine Electrical
  7. 7Replace ECM
  8. 8Replace electronic throttle

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633632635636637638631651556-RTI 3653
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