C0550
DTC C0550CIRCUIT DESCRIPTION
Each control module runs a program to detect internal memory faults. No external circuits are involved. If a memory fault is detected, that control module may set DTC C0550.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC C0550 Electronic Control Unit (ECU) Performance
CONDITIONS FOR RUNNING THE DTC
- The control module has power and ground.
- The ignition is ON.
CONDITIONS FOR SETTING THE DTC
DTC C0550 will set if either of the following conditions occur:
- The control module detects an internal write malfunction.
- The control module detects an internal checksum malfunction.
ACTION TAKEN WHEN THE DTC SETS
If equipped, the following module specific actions may occur:
- The ABS indicator turns ON.
- The BRAKE Warning indicator turns ON.
- The SERVICE 4WD indicator turns ON and the system will be disabled.
- The SERVICE RIDE SYS or SERVICE RIDE CONTROL message is displayed.
- The SERVICE SUSPENSION SYS message is displayed.
- The TCS indicator turns ON.
CONDITIONS FOR CLEARING THE DTC
- A current DTC clears when the malfunction is no longer present.
- A history DTC clears when the ignition is cycled 100 times without a repeat of the malfunction.
DIAGNOSTIC AIDS
- DTC C0550 may be stored as a history DTC without affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.
- If DTC C0550 is retrieved as both a current and history DTC, replace the module that set the DTC.
TEST
