Diagnostic Routine W
Diagnostic Routine W
Diagnostic Overview
Stability Control Sensor Signal Failure DTCs
Refer to Wiring Diagram Set 42 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
The RCM (Restraints Control Module) measures vehicle yaw rate, roll rate, lateral acceleration and longitudinal acceleration and sends the information to the ABS (Anti-Lock Brake System) module over a private HS-CAN (High Speed Controller Area Network). This private HS-CAN (High Speed Controller Area Network) is used only for communication between the RCM (Restraints Control Module) and the ABS (Anti-Lock Brake System) module. The yaw rate sensor, lateral and longitudinal accelerometers are contained in the RCM (Restraints Control Module).
DTC Fault Trigger Conditions
Pinpoint Test
1. CHECK FOR A HS-CAN (High Speed Controller Area Network) CONCERN WITH THE RCM (Restraints Control Module)
1. Ignition ON.
2. NOTE: The network test does not test the private HS-CAN (High Speed Controller Area Network) between the ABS (Anti-Lock Brake System) module and RCM (Restraints Control Module).
Using a scan tool, carry out the network test.
Does the RCM (Restraints Control Module) pass the network test?
2. CHECK THE RCM (Restraints Control Module) FOR DTCs (Diagnostic Trouble Codes)
1. Using a scan tool, carry out the RCM (Restraints Control Module) self-test.
Are any DTCs (Diagnostic Trouble Codes) present in the RCM (Restraints Control Module)?
3. CHECK FOR ABS (Anti-Lock Brake System) MODULE DTC (Diagnostic Trouble Code) U0151:00
1. Using a scan tool, carry out the ABS (Anti-Lock Brake System) module self-test.
Is DTC (Diagnostic Trouble Code) U0151:00 present?
4. VERIFY THE RCM (Restraints Control Module) PART NUMBER
1. Using a scan tool, retrieve and record the RCM (Restraints Control Module) part number.
2. Check the part number recorded against the number listed in the parts catalog.
Does the part number in the RCM (Restraints Control Module) match the part number listed in the parts catalog?
5. CHECK THE PRIVATE HS-CAN (High Speed Controller Area Network) CIRCUITS FOR A SHORT TO VOLTAGE
1. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
2. Disconnect RCM (Restraints Control Module) C310B.
3. Disconnect ABS (Anti-Lock Brake System) Module electrical connector.
4. Repower the SRS (Supplemental Restraint System). Do not prove out the SRS (Supplemental Restraint System) at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
5. Ignition ON.
6. Measure:
Is any voltage present?
6. CHECK THE PRIVATE HS-CAN (High Speed Controller Area Network) CIRCUITS FOR A SHORT TO GROUND
1. Ignition OFF.
2. Measure:
Are the resistances greater than 10,000 ohms?
7. CHECK THE PRIVATE HS-CAN (High Speed Controller Area Network) CIRCUITS FOR A SHORT TOGETHER
1. Measure:
Is the resistance greater than 10,000 ohms?
8. CHECK THE PRIVATE HS-CAN (High Speed Controller Area Network) CIRCUITS FOR AN OPEN
1. Measure:
Are the resistances less than 3 ohms?
9. CHECK FOR CORRECT RCM (Restraints Control Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect the RCM (Restraints Control Module) electrical connectors.
3. Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
4. Connect the RCM (Restraints Control Module) electrical connectors. Make sure they seat and latch correctly.
5. Connect the ABS (Anti-Lock Brake System) module electrical connector. Make sure it seats and latches correctly.
6. Operate the system and determine if the concern is still present.
Is the concern still present?
10. CHECK FOR CORRECT ABS (Anti-Lock Brake System) MODULE OPERATION
1. Ignition OFF.
2. Disconnect and inspect the ABS (Anti-Lock Brake System) module electrical connector.
3. Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
4. Connect the ABS (Anti-Lock Brake System) module electrical connector. Make sure it seats and latches correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
