AD30.30-S-5000A | Cruise control (CC) diagnosis troubleshooting | 24.4.97 |
ENGINE 111.948 /978, 601 in MODEL 638
with CODE (MD0) Cruise control for manual transmission
with CODE (MD9) Cruise control for automatic transmission
| Connection and use of testing equipment | ||
| Cruise control (CC) diagnosis previous knowledge | ||
Troubleshooting | |||
Complaint | Possible cause | Note | Remedy/test procedure |
Cruise control does not operate at all | Voltage supply Cruise control switch S123 Clutch pedal switch S105 Cruise control actuator motor M35 Cruise control control module A1 | ||
"ACCEL. SET" pushbutton does not operate | Cruise control switch S123 Cruise control actuator motor M35 Vehicle speed signal Cruise control control module A1 | ||
"DECEL. SET" pushbutton does not operate | Cruise control switch S123 Cruise control actuator motor M35 Vehicle speed signal Cruise control control module A1 | ||
"Resume" pushbutton does not operate | Cruise control switch S123 Cruise control actuator motor M35 Vehicle speed signal Cruise control control module A1 | ||
"Off" pushbutton does not operate | Cruise control switch S123 Cruise control actuator motor M35 Cruise control control module A1 | ||
Cruise control occasionally does not operate, cannot be switched on, switches off when driving or jerks | Cruise control actuator motor M35 Vehicle speed signal Cruise control control module A1 | ||
Cruise control surges by 5 to 7 km/h over entire speed range | Cruise control actuator motor M35 Cruise control control module A1 | The complaint is clearly perceptible if vehicle speed has been increased with the pushbutton switch. The vehicle continues accelerating by about 5 to 7 km/h after the switch is released, speed decreases again and the variation in speed then occurs continuously. | |
Cruise control continues operating although clutch pedal switch depressed (only on models with manual transmission) | Clutch pedal switch S105 | ||
Vehicle accelerates about 10 km/h beyond the set speed; in addition jerking may occur at high speeds or cruise control switches off | Cruise control control module A1 |
Referenced documents
- ad0000s1000az Connection and use of testing equipment
- ad3030s2000a Cruise control (CC) diagnosis previous knowledge
- ad3030s600001a Cruise control test of electrical system voltage supply
- ad3030s600002a Cruise control test of electrical system cruise control switch
- ad3030s600002b Cruise control test of electrical system cruise control switch
- ad3030s600002c Cruise control test of electrical system cruise control switch
- ad3030s600002d Cruise control test of electrical system cruise control switch
- ad3030s600002e Cruise control test of electrical system cruise control switch
- ad3030s600003a Cruise control test of electrical system actuator motor
- ad3030s600004a Cruise control test of electrical system clutch pedal switch
- ad3030s600005a Cruise control test of electrical system vehicle speed signal
- ad3030s600006a Cruise control test of electrical system cruise control control module
- ad3030s600006b Cruise control test of electrical system cruise control control module
- ad3030s600006c Cruise control test of electrical system cruise control control module
- ad3030s600006d Cruise control test of electrical system cruise control control module
- ad3030s600006e Cruise control test of electrical system cruise control control module