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 "Power Circuit Inspection" procedure.
IG KEY : OFF , Engine : OFF
Disconnect TPS connector(C30).
IG KEY : ON , Engine : OFF
Measure voltage between terminal 2 of the TPS harness connectorC30 and chassis ground.
Specification : Approx. 5V
(If power supply circuit is open or short ground, the voltage shows 0V.)
Is the voltage near the specified value?
YES
Go to "Signal Circuit Inspection"
NO
Possibility of open or short to ground
Repair as necerssary and go to "Verification of Vehicle Repair" procedure.
IG KEY : OFF , Engine : OFF
Disconnect TPS connector(C30).
Measure resistance between terminal 3 of the TPS harness connectorC30 and chassis ground.
Specification : infinite( ∞ Ω)
Is the resistance near the specified value?
YES
Go to "Check for Open in Harness" procedure.
NO
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
IG KEY : OFF , Engine : OFF
Disconnect TPS connector(C30) and ECM connector.
Measure resistance between terminal 3 of the TPS harness connectorC30 and 14 of the ECM harness connectorC22-4.
Specification : Approx. 0Ω.
Is the resistance near the specified value?
YES
Go to "Component Inspection" procedure.
NO
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
