Code 2-1-1 & Code 2-1-2
- Code 2-1-1 is stored if voltage feed, ground or control unit is bad. If control unit does not receive correct voltage, or if ground is bad, cruise control will not function. For cruise control system to function, voltage must be a minimum of 10.5 volts.
- Code 2-1-2 is stored if a short circuit exists to ground or battery voltage exists in circuit to vacuum pump and regulator. Fault may also be in control unit. If a Code 2-1-2 fault code is present, test servo system before performing self diagnosis. See SERVO SYSTEM TEST under DIAGNOSIS & TESTING.
- Turn ignition on. Slide cruise control switch to ON position. Leave control unit connector connected. Using a voltmeter, measure voltage between control unit terminal No. 3 and ground. See Figure . Battery voltage should be present. Using voltmeter, measure voltage between terminal No. 10 and 11. If battery voltage is present, go to next step. If battery voltage is not present, check wiring and grounds as necessary.
- Turn ignition off. Slide cruise control selector switch to ON position. Disconnect control unit connector. Using an ohmmeter, measure resistance between terminal No. 2 on fuse panel and control unit connector terminal No. 11. Fuse panel on 740/940 is located behind ash tray. Fuse panel on 960 is located on left side of instrument panel. Ohmmeter should indicate zero ohms.
- Using an ohmmeter, measure resistance between terminal No. 2 on fuse panel and control unit connector terminal No. 3. Ohmmeter should indicate zero ohms. Use an ohmmeter and measure resistance between control unit terminal No. 10 and steering column (ground). Ohmmeter should indicate zero ohms. If all resistances are okay, test system with a new control unit. If all resistances are not okay, check wiring and connections as necessary.