Front Electronic Module (FEM) Diagnostic Trouble Code (DTC) Index
| DTC | Description | Source | Action |
|---|---|---|---|
| C1924 | VAPS Solenoid Actuator Output Circuit Short to Ground | FEM | Go To PINPOINT TEST A: DTC C1924 - VAPS SOLENOID ACTUATOR OUTPUT CIRCUIT SHORT TO GROUND |
| C1925 | VAPS Solenoid Actuator Return Circuit Failure | FEM | Go To PINPOINT TEST B: DTC C1925 - VAPS SOLENOID ACTUATOR RETURN CIRCUIT FAILURE |
| U1027 | SCP (J1850) Invalid or Missing Data for Engine rpm | PCM | GO to MODULE CONFIGURATION . |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | ABS | GO to MODULE CONFIGURATION . |
| U1059 | SCP (J1850) Invalid or Missing Data for Transmission / Transaxle /PRNDL | PCM | GO to MODULE CONFIGURATION . |
| U1218 | SCP (J1850) Invalid or Missing Data for External Lamps | ICM | GO to MODULE CONFIGURATION . |
| U1222 | SCP (J1850) Invalid or Missing Data for Interior Lamps | ICM | GO to MODULE CONFIGURATION . |
| U1227 | SCP (J1850) Invalid or Missing Data for Body Status Request | ICM | GO to MODULE CONFIGURATION . |
FRONT ELECTRONIC MODULE (FEM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| No communication with the front electronic module (FEM) | Circuit. Module. | REFER to MODULE COMMUNICATIONS NETWORK . |
| Steering system noise | Low fluid level. Fluid aeration. Steering gear. Power steering pump. Loose or damaged steering linkage. Loose or damaged suspension component(s). Steering column. Steering column boot bearing. Intermediate shaft. Loose dash boot seal. | Go To PINPOINT TEST C: STEERING SYSTEM NOISE |
| Steering is very difficult/very easy | Seized intermediate shaft U-joints. Damaged, fractured steering column bearing(s). Steering gear. Power steering pump. Power steering hoses. Binding dash boot seal. | Go To PINPOINT TEST D: STEERING IS VERY DIFFICULT/VERY EASY |
| Excessive steering wheel play | Steering gear. Steering column. Steering column intermediate shaft. Steering linkage. Ball joints. Strut bearing plate (if applicable). | Go To PINPOINT TEST E: EXCESSIVE STEERING WHEEL PLAY |
| Steering system drift/pull/wander | Tire pressure. Wheel alignment. Steering gear. Unevenly loaded vehicle. Steering column intermediate shaft. Frame alignment. | CORRECT the vehicle loading as necessary. Go To PINPOINT TEST F: STEERING SYSTEM DRIFT/PULL/WANDER |
| Feedback | Loose, worn or damaged tie -rod. | INSTALL new tie-rod ends as necessary. Refer to INNER TIE ROD . |
| Loose, worn or damaged tie -rod ends. | GO to Steering Linkage . | |
| Loose or damaged steering gear insulators or bolts. | INSTALL new steering gear insulators or bolts if necessary, or TIGHTEN the bolts as needed. | |
| Loose lower steering column shaft U-joint bolts. | INSTALL new bolts or TIGHTEN the bolts. REFER to STEERING COLUMN . | |
| Loose suspension bushings, fasteners or ball joints. | INSTALL new as necessary. REFER to FRONT in Suspension . | |
| Worn or damaged steering column bearing(s). | INSTALL new steering column bearing(s). | |
| Poor returnability/sticky steering | Binding lower steering column shaft U-joints. | INSTALL new lower steering column shaft. REFER to STEERING COLUMN . |
| Loose, worn or damaged front wheel knuckle tie-rod. | INSTALL new tie-rod ends as necessary. Refer to INNER TIE ROD . | |
| Loose, worn or damaged tie -rod ends. | GO to Steering Linkage . | |
| Suspension components. | REFER to DESCRIPTION AND OPERATION in Front in Suspension or DESCRIPTION AND OPERATION in Rear in Suspension . | |
| Binding steering column bearing(s). Binding dash boot seal. | INSTALL new steering column bearing(s). REFER to STEERING COLUMN . | |
| Shimmy | Loose, worn or damaged tie -rod end. | GO to Steering Linkage . |
| Loose, worn or damaged tie -rod. | INSTALL new tie-rod ends as necessary. Refer to INNER TIE ROD . | |
| Suspension components. | REFER to DESCRIPTION AND OPERATION in Front in Suspension or DESCRIPTION AND OPERATION in Rear in Suspension . |
SYMPTOM CHART
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Scheme 13
Turning Effort Test
Note. Make sure that the front wheels are correctly aligned and the tire pressure is correct before checking the steering effort.
- Park the vehicle on dry concrete and set the parking brake.
- Insert a thermometer into the power steering oil reservoir.
- Idle the engine for 2 to 3 minutes. Turn the steering wheel from stop-to-stop several times to warm the fluid to 50-60°C (122-140°F).
- With the engine running, attach the spring scale to the rim of the steering wheel.
- Measure the pull required to turn the steering wheel one complete revolution in each direction. Refer to Static Steering Wheel Turning Efforts in «GENERAL SPECIFICATIONS»(ref-204554-S07080207322005111200000) .