2143868

Check MAPS performance

(1)

IG "OFF".

(2)

Connnect CH A probe to terminal 1 of MAPS and CH B probe to terminal 1 of TPS connector.

(3)

Warm up the engine to normal operating temperature.

(4)

Measure signal waveform of MAPS and TPS together by stepping on and off the accellerator padel.

Specification : Accepatable temperature range :

(5)

Is the measured signal waveform(Comparison response of TPS with MAPS) O.K ?

YES

Go to "Check ECM" as follows

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

(1)

IG "OFF" and disconnect MAPS connector.

(2)

Connect scantool and Key "ON".

(3)

Select simulation function on scantool.

(4)

Simulate voltage at terminal 1 of MAPS signal connector.

(5)

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.

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.