DR-8A Fault Code 25-Charge Temperature Switch

1. Connect diagnostic readout box to engine harness connector.
2. Disconnect both terminals from the charge temperature switch.
3. Put system in Sensor Test Mode 93.
4. If readout box display reads 03, proceed to Step B. DR-8B Charge Temperature Circuit to Computer
5. If readout box display does not read 03, replace computer. Before replacing computer, ensure terminals in cavity 9 of 14-way connector have a good connection.