CHECK AT ECU TERMINAL


Use special tool power plant ECU check harness (MB991987), check the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> terminal voltage.
1.Remove the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> (Refer to GROUP 13B - Engine-ECU, engine-A-M/T-ECU ) <135, 4A9> or (Refer to GROUP 13C - Engine-ECU ) <4G1>

2.Connect special tool MB991987 between engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> and harness connector.
3.Measure the voltages between the check connector terminals of special tool MB991987 and earth terminals No.75 or 76.


Terminal No.
 Check item
 Check condition
 Normal condition
89
 Cruise control switch power supply
 Ignition switch: "ON"
 All switches: Released
 4.7 - 5.0 V
"ON/OFF" switch: Pressed
 0 - 0.5 V
"CANCEL" switch: Pressed
 1.0 - 1.8 V
"COAST/SET" switch: Pressed
 2.3 - 3.0 V
"ACC/RES" switch: Pressed
 3.5 - 4.2 V
113
 Clutch switch <M/T>
 Ignition switch: "ON"
 Release the clutch pedal.
 1 V or less
Depress the clutch pedal.
 10 V or more