Hard Code, Intermittent Code, Starts Since Set Counter

HARD CODE, INTERMITTENT CODE

HARD CODE
A DTC that comes back within one cycle of the ignition key is a hard code. This means that the problem is current every time the ECM/SKREEM checks that circuit or function. Procedures in this manual verify if the DTC is a hard code at the beginning of each test. When the fault is not a hard code, an intermittent test must be performed.

NOTE: If the DRBIII(R) displays faults for multiple components (i.e. ECT, MAF, IAT sensors) identify and check the shared circuits for possible problems before continuing (i.e. sensor grounds or 5-volt supply circuits). Refer to the appropriate schematic to identify shared circuits.

INTERMITTENT CODE
A DTC that is not current every time the ECM/SKREEM checks the circuit or function is an intermittent code. Most intermittent DTCs are caused by wiring or connector problems. Problems that come and go like this are the most difficult to diagnose; they must be looked for under specific conditions that cause them. The following checks may assist you in identifying a possible intermittent problem.

- Visually inspect the related wire harness connectors. Look for broken, bent, pushed out or corroded terminals.
- Visually inspect the related wire harness. Look for chafed, pierced or partially broken wire.
- Refer to hotlines or technical service bulletins that may apply.

NOTE: Electromagnetic (radio) interference can cause an intermittent system malfunction. This interference can interrupt communication between the ignition key transponder and the SKREEM.