3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
a.
Go to "Signal Circuit Inspection " procedure.
Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Go to "Signal Circuit Inspection " procedure.
Check open in harness.
IG "OFF".
Disconnect MAPS connector.
IG "ON" & ENG "OFF"
Measure voltage between terminal 1 of MAPS harness connector and chassis ground.
Specification : Approx. 5V
Is the measured voltage within specification ?
YES
Go to "Check short to battery in harness" as follows.
NO
Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.
Check short to battery in harness
IG "OFF".
Disconnect MAPS and ECM connector.
Measure resistance between terminal 1 and 2 MAPS harness connector.
Specification : Infinite
Is the measured resistance within specification ?
YES
Go to "Ground Circuit Inspection" procedure.
NO
Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.
IG "OFF".
Disconnect MAPS connector.
Measure resistance between terminal 4 of MAPS harness connector and chassis ground.
Specification : Below 1Ω
Is the measured resistance within specification ?
YES
Go to "Component Inspection" procedure.
NO
Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.
