Power Solutions, Inc.

632

UnclassifiedStarting

What This Code Means

TPS 1 Signal Voltage Low; DST displays TPS 1 voltage of 0.2 volts or less with throttle closed; TPS 1 voltage falls below 0.2 volts when depressing foot pedal

Possible Causes

  • •Damage, corrosion, or contamination on throttle wire harness connector terminals
  • •Faulty ECM
  • •Faulty TPS 1
  • •Intermittent fault in TPS 1 circuit
  • •Lack of continuity / open circuit between TPS 1 connector signal pin C and ECM connector TPS 1 signal pin 53
  • •TPS sensor voltage less than 0.2 volts while engine is cranking or running

Suggested Actions

  1. 1Connect Diagnostic Scan Tool (DST) in Drive by Wire (DBW) throttle test mode with Key ON, Engine OFF to check TPS 1 voltage
  2. 2Disconnect TPS 1 electrical connector, jumper 5 volt reference circuit pin A to TPS 1 signal circuit pin C, and verify DST displays voltage of 4.0 volts or greater
  3. 3Inspect throttle wire harness connector terminals for damage, corrosion, or contamination and repair as necessary
  4. 4Perform On-Board (OBD) System Check
  5. 5Repair circuit wiring as necessary according to Wiring Repairs in Engine Electrical
  6. 6Replace ECM
  7. 7Replace TPS 1
  8. 8Slowly depress foot pedal while observing TPS 1 voltage on DST
  9. 9Using a DVOM, check continuity between TPS 1 connector signal pin C and ECM connector TPS 1 signal pin 53

Related Power Solutions, Inc. Fault Codes

633634631635556-RTI 3636556637555-RTI 2638
Browse all Power Solutions, Inc. fault codes

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