Control Unit
- Engine must be at normal operating temperature and transmission in Neutral (Park on A/T models). Check the control unit according to Control Unit Testing chart.
- When more than 1 Checking Condition is listed, all conditions must be checked. Connect the negative probe of voltmeter to terminal "P" and positive probe to other terminals as described.
- If a problem exists, check circuit to which terminal is connected. If circuit is normal, replace control unit.