Component Inspection
- Check MAPS performance.
- IG "OFF".
- Connnect CH A probe to terminal 1 of MAPS and CH B probe to terminal 1 of TPS connector.
- Warm up the engine to normal operating temperature.
- Measure signal waveform of MAPS and TPS together by stepping on and off the accellerator padel.
Specification : Acceptable temperature range : ( 23 ±5 )°C
PRESSURE & VOLTAGE SPECIFICATION CHARTPressure [Pa] 20 35 60 95 107 Voltage [V] 0.789± 0.045 1.382 ± 0.045 2.369 ± 0.045 3.75 ± 0.045 4.224 ± 0.045 - Is the measured signal waveform(Comparison response of TPS with MAPS) O.K?
YES : - -> Go to "Check ECM" as follows
NO : - -> Substitute with a known - good MAPS and check for proper operation.
- -> If the problem is corrected, replace MAPS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Check ECM.
- IG "OFF" and disconnect MAPS connector.
- Connect scantool and Key "ON".
- Select simulation function on scantool.
- Simulate voltage at terminal 1 of MAPS signal connector.
- Does the signal value of MAPS change according to simulation voltage?
YES : - -> Thoroughly check connectors for looseness, poor connection, bending, corrosion,contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO : - -> Substitute with a known - good ECM and check for proper operation.
- -> If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.