Notes On INTERMITTENTS

Because RTD control module performs a test for different failures under different driving conditions, it is often necessary to test drive vehicle to cause the failure to occur again and allow a code to set. If failure does not occur again during test drive, a good description of vehicle behavior may be helpful in determining which component or circuit is faulty.

Most intermittent problems are caused by faulty electrical connections or wiring. Check for the following conditions:

• Poor mating of connector halves.
• Terminals not fully seated in connector body.
• Improperly formed or damaged terminals (carefully reform all connector terminals in a problem circuit to increase contact tension).
• Poor terminal-to-wire connection (requires removing terminal from connector body to inspect).

Most of the time, if RTD system detects a fault but the fault clears before the ignition is turned off, RTD function will not be disabled. Some failures will disable RTD function for the entire ignition cycle, even if the fault clears before the ignition is turned off.

The following conditions may cause intermittent operation of the RTD system with no DTCs stored:

• An interruption of power to RTD control module (check wiring and fuses).
• Incorrect voltage of power supply circuits (battery or ignition) to RTD control module. Voltage must be more than 10.3 volts and less than 16.0 volts. If this condition occurs while driving, system will not operate normally. When normal voltage is restored, system will operate normally (check charging system).