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MODEL SELECTION INDEX
MY 2005 VZ Series - Service Information
Section 5B5 ABS – GEN III V8
1 General Information
1.1 Definition of Wheel Slip
Longitudinal Wheel Slip
Lateral Wheel Slip
Limitation of the Conventional Braking System
1.2 Definition of ABS Active Braking
Antilock Braking System
2 Component Description and Operation
2.1 Component Location
Vehicles with Independent Rear Suspension (IRS)
Vehicles with Solid Rear Axle
2.2 Electronic Control Unit
Electronic Control Unit Inputs
Electronic Control Unit Outputs
Electronic Control Unit Self-test Initialisation Sequence
2.3 Hydraulic Modulator Assembly
Hydraulic Circuit Components
2.4 Wheel Speed Sensors
Wheel Speed Sensor Principles of Operation
Front Wheel Speed Sensor
Rear Wheel Speed Sensor – Vehicles with IRS
Rear Wheel Speed Sensor – Vehicles with Solid Rear Axle
Testing Wheel Speed Sensor Using an Oscilloscope
2.5 Stop Lamp Switch-A
3 System Operation
3.1 Non-ABS Braking
Non-ABS Braking Operation
Condition Description
Normal Braking Hydraulic Circuit
3.2 Antilock Braking System
ABS Phase – Maintaining Pressure
Condition Description
Control Action
ABS Phase Hydraulic Circuit – Maintaining Pressure
ABS Phase – Reducing Pressure
Condition Description
Control Action
ABS Phase Hydraulic Circuit – Reducing Pressure
ABS Phase – Increasing Pressure
Condition Description
Control Action
ABS Phase Hydraulic Circuit – Increasing Pressure
4 Wiring Diagram and Connector Chart
4.1 Wiring Diagram
4.2 Connector Chart
4.3 Connector Information
Electronic Control Unit – A37
Front and Rear Wheel Speed Sensor – B52L, B52R, B76L and B76
5 Diagnostics
5.1 Diagnostic General Descriptions
Diagnostic Trouble Code Tables
Diagnostic Trouble Codes
Status of DTCs
Action Taken When a DTC Sets
Conditions for Clearing DTCs
6 ABS Diagnostic Starting Point
6.1 Basic Requirements
Basic Knowledge Required
Basic Diagnostic Tools Required
6.2 Diagnostic Precautions
6.3 Preliminary Checks
6.4 Diagnostic System Check
Description
Test Description
7 Intermittent Faults
7.1 Intermittent Fault Diagnostic Table
Description
8 Diagnostic Trouble Codes
8.1 DTC List
8.2 DTC 21, 23, 25, 27, 31, 33, 35 or 37 – Wheel Speed Senso
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 21, 23, 25, 27, 31, 33, 35 or 37 Diagnostic Table
8.3 DTC 28 – Wheel Speed Frequency Error
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 28 Diagnostic Table
8.4 DTC 41, 42, 45, 46, 55 or 56 - Hydraulic Modulator Solenoid Valve Circuit
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 41, 42, 45, 46, 55 or 56 Diagnostic Table
8.5 DTC 61 – Hydraulic Modulator Pump Motor Circuit
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 61 Diagnostic Table
8.6 DTC 63 – ECU Internal Solenoid Valve Relay Circuit
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 63 Diagnostic Table
8.7 DTC 67 – Brake Switch Circuit
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 67 Diagnostic Table
8.8 DTC 71 – ECU Internal Fault
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 71 Diagnostic Table
8.9 DTC 85 – Battery Voltage Out of Range
DTC Description
Circuit Description
Additional Information
Conditions for Running the DTC
Conditions for Setting the DTC
Action Taken When the DTC Sets
Conditions for Clearing the DTC
Test Description
DTC 85 Diagnostic Table
9 Service Operations
9.1 Safety and Precautionary Measures
9.2 ABS Brake Bleeding Procedure
9.3 Electronic Control Unit / Hydraulic Modulator Assembly
Remove
Disassemble
Inspect
Reassemble
Reinstall
9.4 Front Wheel Speed Sensor
9.5 Front Wheel Speed Sensor Lead
Remove
Reinstall
9.6 Rear Wheel Speed Sensor – Vehicles With IRS
Remove
Reinstall
9.7 Rear Wheel Speed Sensor – Vehicles With Solid Rear Axle
Remove
Reinstall
9.8 Front Wheel Speed Sensor Pulse Ring
9.9 Rear Wheel Speed Sensor Pulse Ring – Vehicles With IRS
9.10 Rear Wheel Speed Sensor Pulse Ring – Vehicles With Soli
10 Specifications
11 Torque Wrench Specifications
12 Special Tools
