Retrieving Codes
To retrieve stored RWAL trouble codes, perform RWAL SYSTEM CHECK. See Figure . The 10-pin diagnostic connector is located under dash, behind RWAL ECM. See Fig 1 . Stored trouble codes are flashed by BRAKE warning light. If more than one fault is present, lowest number code will flash repeatedly until it is repaired and cleared from memory. Last flash of indicated code will last longer than others, indicating code is about to repeat. See RWAL TROUBLE CODES table. See TROUBLE CODES under DIAGNOSIS & TESTING.
RWAL TROUBLE CODES
| Code | Condition/Circuit |
|---|---|
| 2 | Open Isolation Solenoid Circuit |
| 3 | Open Dump Solenoid Circuit |
| 4 | Limit Valve Reset Switch Closed |
| 5 | Excessive Dump Valve Action |
| 6 | Wheel Speed Sensor Signal Changes Rapidly |
| 7 | Shorted Isolation Solenoid Circuit |
| 8 | Shorted Dump Solenoid Circuit |
| 9 | Open Wheel Speed Sensor Circuit |
| 10 | Stoplight Switch On Constantly |
| 11 | Shorted Wheel Speed Sensor |
| 13 | RWAL ECM Malfunction |