Fastener Tightening Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Intermediate Steering Shaft Pinch Bolt | 34 N.m | 25 lb ft |
| Outer Tie Rod Nut | 60 N.m | 44 lb ft |
| Steering Gear Bolts | 110 N.m | 81 lb ft |
Fastener Tightening Specifications
Scheme 1
Scheme 2
| Callout | Component Name |
|---|---|
| 1 | Inflatable Restraint Steering Wheel Module Coil |
| 2 | Ignition Lock Cylinder Control Actuator (MN5) |
| 3 | Power Steering Control Module (PSCM) |
| 4 | Ignition Switch |
Power Steering Control Module (PSCM) C1 Connector Part Information 7123-4123-30 2-Way F (BK) Pin Wire Color Circuit No. Function + RD 642 Battery Positive Voltage - BK 350 Ground
Power Steering Control Module (PSCM) C2 Connector Part Information 776195-6 6-Way F (GY) Pin Wire Color Circuit No. Function 1-3 - - Not Used 4 PU 1807 Class 2 Serial Data 5 PU 1807 Class 2 Serial Data 6 PK 1539 Ignition 1 Voltage
Power Steering Control Module (PSCM) C3 Connector Part Information 7123-4123-30 2-Way F (BU) Pin Wire Color Circuit No. Function + RD 5 Motor Control - BK 5 Motor Control
| IMPORTANT | The following steps must be completed before using the symptom tables. |
- Perform the «Diagnostic System Check - Vehicle»(ref-196940-S27536559152005101000000) in Vehicle DTC Information before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control module can communicate via the serial data link. The electric power steering (EPS) assembly has not been damaged from a collision or air bag deployment.
- Review the system operation in order to familiarize yourself with the system functions. Refer to «Power Steering System Description and Operation»(ref-196975-S05408842342005101000000) .
Torque Sensor
The PSCM uses a torque sensor as it's main input for determining the amount of steering assist. The steering column has an input shaft, from the steering wheel to the torque sensor, and an output shaft, from the torque sensor to the steering shaft coupler. The input and output shafts are separated by a torsion bar, where the torque sensor is located. The sensor consists of a compensation coil, detecting coil and 3 detecting rings. These detecting rings have toothed edges that face each other. Detecting ring 1 is fixed to the output shaft, detecting rings 2 and 3 are fixed top the input shaft. The detecting coil is positioned around the toothed edges of detecting rings 1 and 2. As torque is applied to the steering column shaft the alignment of the teeth between detecting rings 1 and 2 changes, which causes the detecting coil signal voltage to change. The PSCM recognizes this change in signal voltage as steering column shaft torque. The compensation coil is used to compensate for changes in electrical circuit impedance due to circuit temperature changes from the electrical current and voltage levels as well as ambient temperatures for accurate torque detection.