Many malfunctions in the electrical system are caused by poor harness(s) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Check the following conditions:
Check for damaged harness and terminals: contact resistance, oxidation, bent or broken terminals.
Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection
Use a suitable male pin to ensure that contact in sockets is good. The pin should remain in position when pulled gently.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
Go to "Signal Circuit Inspection" procedure.
IG KEY : OFF , Engine : OFF
Disconnect MAP sensor connector(C29).
IG KEY : ON , Engine : OFF
Measure voltage between terminal 1 of the MAP sensor harness connectorC29 and chassis ground.
Specification : Approx.3.5V ~ 4.4V
Is the voltage near the specified value?
YES
Go to "Ground Circuit Inspection" procedure.
NO
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
IG KEY : OFF , Engine : OFF
Disconnect MAP sensor connector(C29) and ECM connector.
Measure resistance between terminal 4 of the MAP sensor harness connectorC29and 22 of the ECM harness connectorC22-4
Specification : Approx. 0Ω
Is resistance near the specified value?
YES
Go to "Component Circuit Inspection" procedure.
NO
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
