Main Diagnostics Check
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T01 - | Customer Complaints | |
| Operating Instructions: | ||
| Record customer complaint for later evaluation. | ||
| Yes: go to test step T02 | No: go to test step T01 | |
| T02 - | ||
| Operating Instructions: | Nominal value: Standby message: Audio signal on for 0.5 seconds | |
| - Switch ignition off and then on again | ||
| - Engage reverse gear | ||
| Yes: go to test step T09 | No: go to test step T03 | |
| T03 - | ||
| Operating Instructions: | Actual value: Low audio error signal | |
| - Ignition ON | ||
| - Engage reverse gear | ||
| Yes: go to test step T18 | No: go to test step T04 | |
| T04 - | ||
| Operating Instructions: | Nominal value: Function of reversing lamp OK? | |
| - Ignition ON | ||
| - Engage reverse gear | ||
| - Check function of reversion lamp | ||
| Yes: go to test step T05 | No: Repair function of reversing lamp. Then go to test step T02 |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T05 - | ||
| Operating Instructions: | Nominal value: Cable connections OK | |
| - Reverse gear disengaged | ||
| - Ignition off | ||
| - Cable connection of red line (park pilot system) to reversing lamp OK? | ||
| - Cable connection of brown line (park pilot system) to grounding point OK? | ||
| Yes: go to test step T06 | No: Connect line and go to test step T02 | |
| T06 - | ||
| Operating Instructions: | Nominal value: Plug connection OK? | |
| - Reverse gear disengaged | ||
| - Ignition off | ||
| - Wiring harness plug (park pilot system) to control unit connected? | ||
| Yes: go to test step T07 | No: Connect control unit and go to test step T02 |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T07 - | ||
| Operating Instructions: | Nominal value: Loudspeaker connected OK? | |
| - Reverse gear disengaged | ||
| - Ignition off | ||
| - Wiring harness plug for loudspeaker (park pilot system) connected? | ||
| Yes: go to test step T08 | No: Connect loudspeaker and go to test step T02 | |
| T08 - | ||
| Operating Instructions: | Nominal value: Wiring harness OK | |
| - Reverse gear disengaged | ||
| - Ignition off | ||
| - Check wiring harness for control unit (park pilot system) and ensure functionality? | ||
| Yes: Replace control unit | No: Repair or replace wiring harness (park pilot system). Then go to test step T02. | |
| T09 - | ||
| Operating Instructions: | Actual value: Continuous low audio error signal | |
| - Ignition ON | ||
| - Engage reverse gear | ||
| Yes: go to test step T23 | No: go to test step T10 |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T10 - | ||
| Operating Instructions: | Nominal value: Distance warning over loudspeaker (park pilot system). | |
| - Ignition ON | ||
| - Engage reverse gear | ||
| - Check whether park pilot system emits a distance warning. | ||
| Yes: go to test step T13 | No: go to test step T11 | |
| T11 - | ||
| Operating Instructions: | Nominal value: Distance warning over loudspeaker (park pilot system). | |
| - Ignition ON | ||
| - Engage reverse gear | ||
| - Place obstacle in measuring range | ||
| - Check whether park pilot system emits a distance warning. | ||
| Yes - result: System OK | No: go to test step T12 | |
| T12 - | ||
| Operating Instructions: | Actual value: At ground | |
| - Check whether line No. 4 (see "System Wiring Harness - Park Pilot") is present at ground. | ||
| Yes: Insulate line. Then go to test step T02. | No: Check and ensure battery voltage. Then go to test step T02. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T13 - | ||
| Operating Instructions: | Actual value: Object present | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Check whether there is an object in the distance of less than 3 m in the measuring range behind the vehicle. | ||
| Yes: Remove object and go to test step T02 | No: go to test step T14 | |
| T14 - | ||
| Operating Instructions: | Nominal value: Vehicle-specific resistance value for coding plug OK. | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Check whether the correct (vehicle-specific) coding plug is connected. | ||
| Yes: insert checked coding plug, then go to test step T15. | No: insert new coding plug, then go to test step T02. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T15 - | ||
| Operating Instructions: | Nominal value: Positions of ultrasonic sensors OK. | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Check whether the ultrasonic sensors remain correctly in the position when installing them. | ||
| Yes: go to test step T16. | No: Correct positions of ultrasonic sensors (if necessary, rework new rear panelling). Then go to test step T02. | |
| T16 - | ||
| Operating Instructions: | Nominal value: Ultrasonic sensors engaged correctly. | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Check whether the engaging tabs of the ultrasonic sensors have been engaged correctly. | ||
| Yes: go to test step T17. | No: Engage ultrasonic sensors correctly. Then go to test step T02. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T17 - | ||
| Operating Instructions: | Nominal value: Correctly fit decoupling rings on the ultrasonic sensors. | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Check whether the decoupling rings on the ultrasonic sensors have been fitted correctly. | ||
| Yes: go to test step T23 | No: Correctly fit decoupling rings. Then go to test step T02. | |
| T18 - | ||
| Operating Instructions: | Actual value: Continuous low audio error signal | |
| - Ignition ON | ||
| - Engage reverse gear | ||
| Yes: go to test step T19. | No: go to test step T20. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T19 - | ||
| Operating Instructions: | Actual value: Vehicle-specific coding plug OK. | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Check whether the correct (vehicle-specific) coding plug is connected and has not be confused with a fuse. | ||
| Yes: Insert checked coding plug, check system wiring harness of park pilot for short circuits and ensure functionality. Then go to test step T02. | No: Insert new coding plug (genuine Aftersales part). Then go to test step T02. | |
| T20 - | ||
| Operating Instructions: | Nominal value: Vehicle-specific coding plug is inserted. | |
| - Check whether the correct (vehicle-specific) coding plug is connected. | ||
| Yes: go to test step T21. | No: Insert new coding plug (genuine Aftersales part). Then go to test step T02. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T21 - | ||
| Operating Instructions: | Nominal value: Resistance value OK. | |
| - Check (re-measure) whether the resistance value of the (vehicle-specific) coding plug is OK. | ||
| Yes: go to test step T22. | No: Insert new coding plug (genuine Aftersales part). Then go to test step T02. | |
| T22 - | ||
| Operating Instructions: | Nominal value: System wiring harness for park pilot OK. | |
| - Check system wiring harness for park pilot and ensure functionality. | ||
| Yes - result: Replace control unit. | No: Repair or replace wiring harness (park pilot system). Then go to test step T02. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T23 - | ||
| Operating Instructions: | Nominal value: Then an intermittent audio signal of 3 seconds is emitted. | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Disconnect vehicle-specific coding plug from plug device. | ||
| - Ensure that there is no object in the distance of less than 3 m in the measuring range behind the vehicle. | ||
| - Switch on ignition | ||
| - Engage reverse gear | ||
| - Wait for end of start sequence for check (3 sec continuous audio signal, 1 sec pause). | ||
| Yes: go to test step T24. | No: see section "Fault diagnosis". Evaluate sensor fault diagnosis and replace defective ultrasonic sensors or sensor cables. Then go to test step T02. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T24 - | ||
| Operating Instructions: | Nominal value: Vehicle-specific resistance value for coding plug OK. | |
| - Check whether the correct (vehicle-specific) coding plug is connected and the resistance value is OK. | ||
| Yes: go to test step T25. | No: Insert new vehicle-specific coding plug (genuine Aftersales part). Then go to test step T02. |
| Test Step | Test / Operating Instructions | |
|---|---|---|
| T25 - | ||
| Operating Instructions: | Nominal value: Intermittent audio signal of 3 sec | |
| - Ignition off | ||
| - Reverse gear disengaged | ||
| - Disconnect plug adapter at sensor line wiring harness | ||
| - Insert vehicle-specific coding plug. | ||
| - Ignition ON | ||
| - Engage reverse gear. After 3 sec, ignition off and reverse gear disengaged | ||
| - Disconnect vehicle-specific coding plug | ||
| - Ignition ON | ||
| - Engage reverse gear | ||
| Yes: go to test step T26. | No: Replace sensor line wiring harness. Then go to test step T02. | |
| T26 - | ||
| Operating Instructions: | Nominal value: Battery voltage larger than 10 volt OK. | |
| - Check whether battery voltage is greater than 10 volt. | ||
| Yes - result: Replace control unit (park pilot system). Then go to test step T02. | No: Ensure battery voltage is 12 volt. Then go to test step T02. |