Power Solutions, Inc.

112

UnclassifiedEmissions

What This Code Means

MIL-On during active fault and for 2 seconds after active fault; Adaptive-Disabled during active fault; Closed Loop-Enabled and allowed to stay at limit if required; ECM uses default value for IAT sensor

Possible Causes

  • •Continuity/short circuit between TMAP sensor connector ground pin 1 and signal pin 2
  • •Continuity/short circuit between TMAP sensor connector signal circuit pin 2 and engine ground
  • •Diagnostic Trouble Code current for a sensor
  • •Faulty ECM
  • •Faulty TMAP sensor
  • •IAT sensor voltage less than 0.05 volts anytime the engine is cranking or running
  • •Intermittent problem
  • •Unresolved lower-numbered DTC (DTC 112 causing DTC 122)

Suggested Actions

  1. 1Check DST in System Data Mode for IAT voltage
  2. 2Check for continuity between TMAP sensor connector signal circuit pin 2 and engine ground
  3. 3Clear DTCs by turning ignition key to OFF position and removing system main power fuse (F3) for 15 seconds
  4. 4Clear DTCs using a laptop computer
  5. 5Diagnose problems starting with the lowest number DTC first
  6. 6Disconnect ECM wire harness connector and check for continuity between TMAP sensor connector ground pin 1 and signal pin 2
  7. 7Disconnect TMAP sensor wire harness connector and check DST IAT voltage
  8. 8Perform On-Board (OBD) System Check
  9. 9Repair DTC 112 first to correct DTC 122
  10. 10Repair the circuit as necessary
  11. 11Replace ECM
  12. 12Replace TMAP sensor

Related Power Solutions, Inc. Fault Codes

121122131242DTC 222113114111115123
Browse all Power Solutions, Inc. fault codes

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