Scantool Diagnostics
Automatic Transaxle
P0642 Sensor Reference Voltage 'A' Circuit Low - Scantool Diagnostics
Monitor Scantool Data
1. Connect scantool to Diagnostic Connector.
2. Ignition "ON" & Engine "OFF".
3. Confirm the "Battery Voltage, Ignition Key Status, Main Relay Voltage, parameter on the scan tool.
Fig 1) Main relay and Battery voltage (Idle status)
Fig 2) Main relay and Battery voltage (Ignition "ON")
4. Is "Battery Voltage" output value within normal range?