Vehicle Speed Is Unstable

Check cruise control actuator cable adjustment. See CRUISE CONTROL ACTUATOR CABLE  under ADJUSTMENTS. If cable adjustment is okay, perform the following check procedures in order.

• CRUISE CONTROL ACTUATOR CIRCUIT CHECK
• BRAKE SWITCH CIRCUIT CHECK (4-SPEED A/T)
• COOLANT TEMP. SWITCH SIGNAL CIRCUIT CHECK (4-SPEED A/T)
• THROTTLE VALVE OPENING SIGNAL CIRCUIT CHECK (4-SPEED A/T)
• CRUISE CONTROL ECU CIRCUIT CHECK