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Home >> Isuzu >> 1999 >> Trooper Part Time >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Trouble Code Identification >> DTC P0336: Crankshaft Position (CKP) Sensor 58X Reference Signal Circuit >> Diagnostic Aids
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Diagnostic Aids

An intermittent may be caused by a poor connection, rubbed-through wire insulation or a broken wire inside insulation. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Connect voltmeter to 58X reference circuit (Yellow wire) and wiggle harness and connectors. A change in voltage will indicate area of problem. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Attempt to start engine. If engine starts and runs, go to next step. If engine does not start and run, see BASIC DIAGNOSTIC PROCEDURES article.
  3. Using scan tool, clear DTC P0336. Start engine and allow it to idle for one minute. Read DTCs. If DTC P0336 resets, go to next step. If DTC does not reset, check for an intermittent problem. See DIAGNOSTIC AIDS .
  4. Disconnect PCM and CMP sensor harness connectors. Check for an open or short to ground in 58X reference circuit between CKP sensor connector and PCM harness connector. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  5. Reconnect PCM and CKP sensor harness connectors. Measure voltage at 58X reference circuit at PCM harness connector while cranking engine. If reading is about 2.5 volts, go to step  7. If voltage is not about 2.5 volts, go to next step.
  6. Check for faulty connection at CKP sensor. If a faulty connection is found, repair as necessary. If connection is okay, replace CKP sensor. Retest system.
  7. Check for faulty connection at PCM. If a faulty connection is found, repair as necessary. If connection is okay, replace PCM. Retest system.
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