Many malfunctions in the electrical system may caused from poor harness and terminals. These faults can 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 and poor terminal to wire connection
Using 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
system OK.
IG KEY : ON, Engine : OFF
INPUT CONNECTOR SENSOR : Disconnect
Measure voltage between C02 Terminal 3 and GND using Multimeter.
Channel1 Prove(+) : OUTPUT SENSOR C02 Terminal 3 SENSOR SiGNAL
Channel1 Prove(-) : Battery(-).
Specification : 1.45V
Is approx. 1.45V measured ?
YES
Go to Ground sircuit inspection
NO
Verify line Open or Short between PCM C33-2 Terminal 29 and C02 Terminal 3.
If line is normal, go to Controller inspection .
IG KEY : ON , Engine : OFF
INPUT SENSOR CONNECTOR : Disconnect
measure voltage between between PCM C02 Terminal 4 and GND by using Multimeter.
Channel1 Prove(+) : OUTPUT SENSOR C02 Terminal 4 signal Line
Channel1 Prove(-) : Battery(-).
Specification : Approx 1.17V
Is measured value 1.7V ?
YES
Go to Conponent Inspection
NO
Verify line Open or Short between PCM C33-2 Terminal 20 and C02 Terminal 4.
If line is normal, go to Controller inspection .
