caution | Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal. |
note | OSS-ECU can communicate with the scan tool MB991958 even when the engine switch is in the "OFF" position. |
note | If ETACS-ECU is not active, OSS-ECU cannot communicate with the scan tool MB991958. |
caution | To prevent damage to scan tool (MB991958), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (MB991958). |
caution | To prevent damage to scan tool (MB991958), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (MB991958). |
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