Component Inspection

Component Inspection

1. MAPS performance test
(1) IG "OFF"
(2) Connect scantool to Data Link Connector (DLC) and select "Oscilloscope" then, connect probes to output signal lines of MAPS and TPS.
(3) Start engine and monitor the waveforms accelerating or decelerating.
A. Specification :









(4) Is the waveform displayed correctly? (Compare the response time of TPS and MAPS)
YES
- Go to "Check PCM".
NO
- After replacing MAPS with new one, if it operates normally, replace MAPS and go to "Verification of Vehicle Repair".
2. Check PCM
(1) IG "OFF" disconnect MAPS connector
(2) Connect Scantool and IG "ON" & amp; ENG "OFF"
(3) Select simulation function on scantool.
(4) Simulate voltage at terminal 1 of MAPS harness connector.




(5) Does the output voltage response to the change of signal by simulation?
YES
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace if necessary and go to "Verification of Vehicle Repair" procedure
NO
- Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.

CAUTION:
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.