The customer’s complaint is that the vehicle does not start with the Stop / Start (MSA) system. The instrument cluster may be displaying the MSA icon.
Poor or weak battery.
- Using the AssistPlus, carry out a Quick Test and ensure the MSA system is fault free. For example, there should be no faults stored relating to the brake vacuum sensor or neutral gear position sensor.
- Select SERVICE FUNCTIONS from the main page.
- Select BATTERY CHARGE STATUS
- Determine battery state of charge. If it is low, recharge the battery fully.
- Disconnect the IBS sensor (at the battery negative post) for at least 10 seconds and then reconnect it. This starts the initial measuring of the battery voltage again.
- Wait 1.5 hours and then recheck the battery state of charge.
- If the battery is sufficiently charged (75% or over) and the ambient conditions are correct (over 3ºC or 37ºF) the MSA should now work.
- If the battery charge status is not available (battery charge condition cannot be determined), disconnect the IBS sensor for at least 10 seconds and then reconnect it. Leave for 1.5 hours and determine the battery state of charge. If it is too low then charge and repeat as above.
- If battery charge is still not detected, replace the IBS sensor/battery negative lead.
- Once the battery state of charge can be determined and as long as it is sufficiently charged (75% or over) then the MSA should work okay.