Symptom/Conditions: Failed starting due to battery run down. | | | | |
Diagnosis | | | | |
Step |
Operations to be carried out |
Test results | | |
1 |
CHECK ON BATTERY CONDITIONS ON VEHICLE |
All OK |
Problems encountered |
Operation |
|
When the vehicle arrives in the workshop, measure the Loads Outside of the Key (CFC) absorption following the instructions in paragraph 3.
|
If the battery is completely run down, in order to measure the CFC absorption without interrupting the continuity of the electrical circuit a 12V feeder (minimum current 5A) should be placed in parallel to the battery or to another battery (without starting the vehicle).
|
| Move on to Step 2 |
Loads Outside of the Key (CFC) absorption values that do not conform |
Selective analysis of loads by removing fuses and identification of critical loads for absorption. |
2 |
CHECK ON CONNECTIONS AND BATTERY LEADS CONTINUITY |
All OK |
Problems encountered |
Operation |
|
Check the state of the connections and the continuity of the leads between the battery and the alternator; starter motor; engine compartment junction unit; bodyshell earth; engine earth. |
Move on to Step 3 |
State of connections and continuity of battery leads do not conform. |
Replacement/tightening of leads. |
3 |
CHECK ON CONDITIONS OF REMOVED BATTERY |
All OK |
Problems encountered |
Operation |
|
Disconnect the battery from the vehicle and carry out the fault diagnosis of the state and conditions following the instructions in SN 55.21.07. |
- |
- Battery efficient |
No operation, refit the batteryin the vehicle and move on to Step 4. |
Battery efficient, needs recharging |
Recharge the battery and carry out the final check (as described in SN 55.21.07 - paragraph 3 - Recharging methods) refit the battery in the vehicle and move on to Step 4. | | | |
Charge / Retest |
Recharge the battery and carry out a new fault diagnosis (as described in SN 55.21.07 - paragraph 1 - Fault diagnosis of operating conditions or battery faulty) and move on to Step 4. | | | |
Replace the battery |
Replace the battery with another one with the same specifications and move on to Step 4. | | | |
Cell short |
Replace the battery with another one with the same specifications and move on to Step 4. | | | |
4 |
CFC ABSORPTION MEASUREMENT |
All OK |
Problems encountered |
Operation |
|
Measure the CFC absorption (following the instructions in paragraph 3) after each of the 5 - 10 repetitions of the following sequence: Key On - Key Off, door opening and closing |
Move on to Step 5 |
CFC absorption values do not conform |
Selective analysis of loads by removing fuses and identification of critical loads for absorption. |
5 |
ALTERNATOR OPERATION CHECK |
All OK |
Problems encountered |
Operation |
|
Alternator supply check (according to instructions in paragraph 2) |
Move on to Step 6 |
Alternator supply does not conform. |
Replace alternator |
6 |
ENGINE WARMING UP |
All OK |
Problems encountered |
Operation |
|
Keep the engine idling, at operating temperature, for 20 minutes |
Move on to Step 7 |
- |
- |
7 |
CFC ABSORPTION MEASUREMENT |
All OK |
Problems encountered |
Operation |
|
Measure the CFC absorption (following the instructions in paragraph 3) after each of the 5 - 10 repetitions of the following sequence: Key On - Key Off, carried out with the following loads activated:
- radio;
- interior lighting;
- doors open;
- air conditioning manually activated (with fans at maximum speed). |
Vehicles not equipped with CAN:
End of diagnosis |
CFC absorption values do not conform. |
Selective analysis of loads by removing fuses and identification of critical loads for absorption. |
Vehicles equipped with CAN:
Move on to Step 8 | | | | |
8 |
CHECK ON SLEEP MODE STATUS - (ONLY FOR VEHICLES EQUIPPED WITH CAN) |
All OK |
Problems encountered |
Operation |
|
Check using CAN ANALYZER on EXAMINER starting from release 7.0 of CAN Sleep Mode status.
Do not carry out any operations on the vehicle after the launch.
No nodes should be activated about 5 minutes after the last Key Off. |
End of diagnosis |
Values do not conform. |
Make a note of the figures and contact Te.Se.O. |