Test Description
WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport and 2002 Isuzu Rodeo. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers in the diagnostic procedures.
- 1
PMC OBD II system check prompts technician to complete some basic checks and store the freeze frame and failure records data on scan tool if applicable. This creates an electronic copy of data taken when fault occurred. The information is then stored on the scan tool for later reference.
- 2
Engine temperature is critical for PCM to properly learn CKP sensor TEC. Failure to properly warm-up engine before performing procedure will result in an inaccurate measurement of CKP sensor TEC. PCM learns this variation as engine is decelerating and then allows engine control to be returned to the operator. All accessories must be turned off when learning crankshaft position system angle variation. If A/C is not disabled when learn procedure is started, PCM will disable A/C. When PCM is ready to allow learn procedure to run, scan tool will display TEST IN PROGRESS.
- 3
If after specified number of attempts, PCM cannot learn crankshaft position, variation is too large and learn procedure is not possible.
- 4
When PCM is unable to learn CKP sensor TEC, variation is out-of-range. Using Excessive Crankshaft Variation trouble shooting guide, will aid in diagnosing area of fault. See EXCESSIVE CRANKSHAFT VARIATION SYMPTOM GUIDE
.
EXCESSIVE CRANKSHAFT VARIATION SYMPTOM GUIDE
| Tech 2 Display |
Possible Cause |
| Factors Out Of Range |
|
| Opposing Factors Out Of Range |
|
| Sun Out Of Range |
|
| Crank Pulse Count Error |
|