PROGRAMMING
| WARNING | Deactivate air bag system before performing any service operation. See appropriate AIR BAG DEACTIVATION PROCEDURES article in RESTRAINTS. DO NOT apply electrical power to any component on steering column without first deactivating air bag system. Air bag may deploy. |
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See appropriate COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
POWERTRAIN CONTROL MODULE (PCM)
To program PCM, see SELF-DIAGNOSTICS article in FAULT ISOLATION in ENGINE PERFORMANCE.
Disconnect Battery
Note. On many OBD-II systems, PCM will retain memory for an extended period of time with battery disconnected. Memory may be retained for several days.
Disconnecting PCM power or battery ground will clear all PCM memory including DTCs, freeze frame, failure records, adaptive learning and system monitors.
Warm-Up Cycles
If fault that caused DTC to set is repaired, PCM will begin to count warm-up cycles. After 40 consecutive warm-up cycles with no further faults, PCM will automatically clear DTC from memory.
SYSTEM TESTS
| WARNING | Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article in ACCESSORIES & EQUIPMENT. |
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
Note. The following tests assume that engine and battery are operating normally and are at normal operating temperature, battery is fully charged, there are no engine problems that would cause a no-start condition, and no diagnostic trouble codes are present.
| Symptom | Perform Test |
|---|---|
| Starter Solenoid Does Not Click | A |
| Starter Solenoid Clicks, Engine Does Not Crank | B |
| Engine Cranks Slowly | C |
| Starter Noise Diagnosis | D |
SYMPTOM INDEX