System Tests: Notes
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:
Before performing following tests, perform preliminary inspection. See PRELIMINARY INSPECTION
under TROUBLE SHOOTING.
NOTE:
Connector Test Adapter Kit (J 35616-A) must be used whenever a diagnostic procedure requires checking or probing a terminal to prevent damage to terminal. To locate and identify connectors and terminals, see WIRING DIAGRAMS
.
NOTE:
System tests are written specifically for use with GM Tech 1 or 2 scan tools. Generic scan tool can be used, but may have limited functions.
NOTE:
Before replacing any control module, ensure all module ground and power circuits are functioning properly. For circuit identification, see GROUND DISTRIBUTION and POWER DISTRIBUTION articles in WIRING DIAGRAMS.
SYMPTOM INDEX
| Symptom | Perform Test |
|---|---|
| Power Seat Inoperative (Without RPO Code A45) | A |
| Power Seat Inoperative (With RPO Code A45) | B |
| Power Seat Does Not Move Forward/Rearward (Without RPO Code A45) | C |
| Power Seat Does Not Move Forward/Rearward (With RPO Code A45) | D |
| Power Seat Does Not Tilt Forward (Without RPO Code A45) | E |
| Power Seat Does Not Tilt Forward (With RPO Code A45) | F |
| Power Seat Does Not Tilt Rearward (Without RPO Code A45) | G |
| Power Seat Does Not Tilt Rearward (With RPO Code A45) | H |
| Power Seat Does Not Recline (Without RPO Code A45) | I |
| Power Seat Does Not Recline (With RPO Code A45) | J |
| Memory Seat Feature Inoperative | K |
| Lumbar Support Inoperative (Without RPO Code A45) | L |
| Lumbar Support Inoperative (With RPO Code A45) | M |
| Lumbar Support Inoperative (With RPO Code AC9) | N |
| Lumbar Support Does Not Move In Or Out (Without RPO Code A45) | O |
| Lumbar Support Does Not Move In Or Out (With RPO Code A45) | P |
| Lumbar Support Does Not Move Up Or Down (Without RPO Code A45) | Q |
| Lumbar Support Does Not Move Up Or Down (With RPO Code A45) | R |
| Lumbar Support Does Not Move Up Or Down (AM3 With RPO Code A45) | S |
| Lumbar Support Does Not Move Up Or Down (AM3 Without RPO Code A45) | T |
| Lumbar Massage Inoperative (Without RPO Code A45) | U |
| Lumbar Massage Inoperative (With RPO Code A45) | V |
| Heated Seat Always On | W |
| Heated Seat Inoperative | X |
| Heated Seat Inoperative - Heated Back Mode | Y |
| Heated Seat Switch Low Indicator Malfunction | Z |
| Heated Seat Switch Medium Indicator Malfunction | AA |
| Heated Seat Switch High Indicator Malfunction | AB |
| Heated Seat Switch Mode Indicator Malfunction | AC |