System Inspection
System Inspection
Back up Voltage Inspection
1. Ignition "OFF"
2. Disconnect ECM connector
3. Ignition "ON"
4. Measure voltage between terminal 6 of the ECM harness connector and chassis ground
A. Specification: Remain stable at battery voltage
5. Are circuits remaining stable at battery voltage ?
YES
1) 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.
CAUTION: 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)
NO
1) If voltage fluctuates, check circuit for loose, bent or corroded terminals, Repair as necessary and go to "Verification of Vehicle Repair" procedure