CAUTION:: This system operates using fluid pressure up to 12 400 kPa (1800 psi). Some malfunctions can cause this pressure to be trapped in the system. Use caution when loosening pipe fittings on a system that does not work or personal injury can result.
CAUTION:: Do not disassemble the actuator. Always service the actuator as a unit. The actuator contains a large spring under tension. Disassembling the actuator allows the spring to expand with great force, which can result in personal injury.
CAUTION:: If the parking brake applies due to an electrical system failure, activate the parking brake by pulling out the parking brake switch before exiting the vehicle. Failure to do so can result in the parking brake releasing when the electrical system is repaired. This can allow the vehicle to move and cause personal injury.
| • | Turn the ignition switch to the OFF position and disconnect the parking brake control module (PBCM) connector before welding on the vehicle with an electric welder. |
| • | Do not use a fast charger for starting the engine. |
| • | Disconnect the negative battery cable when fast charging. |
| • | Never disconnect the battery from the vehicle electrical system while the engine is running. |
| • | Ensure that all of the wiring harness connectors are securely connected. |
| • | Always note the routing, position, mounting and location of all of the components, wiring, connectors, clips, brackets, brake pipes, etc., when servicing the EHPB system. Pressure sensor wiring, routing and retention are especially important in order to help prevent false signals due to electrical noise picked up by the wiring. Proper system operation can only be achieved if the system is restored to the original equipment condition. |
The above mentioned items do not cover every possibility, but must be followed when working on the EHPB system. Become familiar with the EHPB system, and how the EHPB system relates to the vehicle's other components when servicing the vehicle.
