DR-9B Coolant Sensor Circuit to Computer

1. With diagnostic readout box connected and system in Sensor Test Mode 92 and coolant sensor connector disconnected, using a jumper wire connect sensor connector terminals.
2. If readout box display changes from 01 to 03 after jumper wire is connected, replace coolant sensor.
3. If readout box display does not change from 01 to 03 after jumper wire is connected, proceed to Step C. DR-9C Coolant Sensor Wires to Computer