Ignition "OFF"
Disconnect ECM connector
Ignition "ON"
Measure voltage between terminal 6 of the ECM harness connector and chassis ground
Specification : Remain stable at battery voltage
Are circuits remaining stable at battery voltage?
YES
▶ Using a scan tool, check ECM software version and upgrade as necessary. If version is the newest one, check ECM for contamination, deterioration, or damage. Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.
It is necessary to perform the TPS adaptation procedure with Scan tool when the throttle body assembly or ECM is replaced.
▶ TPS adaptation procedure
1. Erase previous TPS adaptation value using Scan tool.
2. Ignition "OFF" and then "ON" without cranking. Wait for 10 seconds under enable conditions
Enable conditions : Battery >10V & Intake Air Temp. >5.3°C(41.5°F) & 5.3°C(41.5°F) <Engine Coolant Temp. <99.8°C(211.6°F)
3. After TPS adaptation, the system normality should be confirmed by reading out "FMY" on the Scan Tool
NO
▶ If voltage fluctuates, check circuit for loose, bent or corroded terminals, Repair as necessary and go to "Verification of Vehicle Repair" procedure
