Diagnostic Procedures
WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
- Perform On-Board Diagnostic II (OBD-II) System Check. See SELF-DIAGNOSTICS - INTRODUCTION article. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
- Ensure Tech 2 scan tool is installed. Perform CKP system variation learn procedure as follows:
- Transaxle in Park or Neutral.
- ECT at 150°F (685°C).
- Engage parking brake.
- Block vehicle drive wheels.
- All accessories off.
- Using scan tool, enable CKP system variation learn procedure.
- Slowly increase engine speed to 4000 RPM and release throttle as soon as engine cuts out.
If scan tool indicates that CKP system variation has been learned, go to step 5. If scan tool does not indicate that CKP system variation has been learned, go to next step.
- Attempt CKP system variation learning procedure 3 times. If crankshaft variation has not been learned, go to next step. If crankshaft variation has been learned, go to step 5.
- Check for problem with CKP sensor-to-crankshaft relationship. If problem is found, go to step 6. If no problem is found, go to DIAGNOSTIC AIDS .
- Turn ignition off for 15 seconds. After crankshaft variation learn procedure is complete, go to step 7.
- Replace CKP sensor and/or crankshaft reluctor wheel. After sensor replacement, go to next step.
- Using scan tool, select DTC, CLEAR INFO. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter DTC P1336. Operate vehicle within the conditions for setting this DTC. If scan tool indicates test RAN AND PASSED, go to next step. If scan tool does not indicate test RAN AND PASSED, repeat step 2.
- Using scan tool, select CAPTURE INFO, REVIEW INFO. If any undiagnosed DTC(s) are displayed, go to applicable DTC test. If no DTCs are displayed, system is okay.