Battery Drain Diagnostic Flow Chart - keywords adaptor column draw harness interface IPOD lamp light lights lock manual parasitic program shift shifter steering transmission wheel
| Subject: | Battery Drain Diagnostic Flow Chart |
| Models: | 2004-2008 Cadillac XLR and XLR V-Series |
| 2005-2008 Chevrolet Corvette and Z06-Series |
This PI was superseded to update flow chart. Please discard PIC4580A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment that their vehicle's battery will be dead at times. It is important prior to diagnostics to understand when and where the customer has a concern. Further it is important to question the customer on driving habits and acknowledge any electrical device or accessory the customer may have installed that requires the vehicles battery power for use. The diagnostic information below may assist a technician to isolate a few key areas of battery drain on these vehicles.
Recommendation/Instructions:
Step | Action | Values | Yes | No |
Please read the following bulletins/PIs before continuing with the diagnostics: | ||||
Bulletins # 07-06-03-001B (2005-2007 model years only) , #02-06-03-010A (2004-2005 model years only) | ||||
PI # - PIC3454A (2004-2007 Model Years Only) | ||||
PIs # - (Corvette only) PIC4188E (2005-2008 models years) and PIC4426A (2005-2008 model years) | ||||
PIs # - (XLR only 2004-2008 model years) PIC4474A | ||||
1 | Perform a Parasitic Draw Test per document ID#1617480 | -- | Go To Step 2 | Go To Step 25 |
Was there a Draw Present (acceptable draw is 10-20 mA) | ||||
See PIC#3589C, doc ID#1963820 for more information on proper procedures to perform a parasitic draw test on this vehicle. Leave multi-meter on the car for the remainder of the test. | ||||
2 | What level of current draw does the car have after 20 minutes of sitting? | 0-10 mA | Invalid Test Setup | |
10-20 mA | Normal Condition | |||
Go to Step 25 | ||||
20-60 mA | Go To Step 3 | |||
60-200 mA | Go To Step 10 | |||
200+mA | Go To Step 18 | |||
3 | Remove the ECM/TCM fuse 11 from the UBEC | -- | Go To Step 4 | Go To Step 10 |
Was the Draw Eliminated? | ||||
4 | Re-Install the ECM/TCM fuse 11 into the UBEC. | -- | Go To Step 6 | Go To Step 5 |
Remove the RCDLR C1 to isolate the RCDLR. | ||||
Was the Draw Eliminated? | ||||
5 | Continue with Parasitic Draw Diagnosis on the ECM/TCM Circuits | -- | -- | -- |
6 | Reconnect C1 to the RCDLR | -- | Go To Step 7 | Go To Step 8 |
Insure that there are no inputs coming into the RCDLR causing the module to continue to stay awake. | ||||
Where any active inputs found? | ||||
7 | Diagnose and correct the concern found on this vehicle. | -- | Go To Step 1 | -- |
8 | Reconnect the RCDLR | -- | Go To Step 25 | Go To Step 9 |
Reprogram the RCDLR per bulletin #07-06-03-001B | ||||
Was the draw eliminated? | ||||
9 | Replace the RCDLR | -- | Go To Step 1 | -- |
10 | Remove the BATT5/BCM fuse #7 from the UBEC. | -- | Go To Step 12 | Go To Step 11 |
Was the Draw Eliminated? | ||||
11 | Continue with Normal Parasitic Draw Diagnostics on BCM and circuits powered by BCM fuse block | -- | -- | -- |
12 | Re-Install the BATT5/BCM fuse #7 into the UBEC. | -- | Go To Step 13 | Go To Step 18 |
Remove the Onstar fuse from the BCM fuse block. | ||||
Was the draw eliminated? | ||||
13 | Re-Install the Onstar fuse into the BCM fuse block. | -- | Go To Step 15 | Go To Step 14 |
Disconnect the VCIM C1 from the VCIM. | ||||
Was the draw eliminated? | ||||
14 | Continue with Diagnostics on Circuits powered by Onstar Fuses | -- | -- | -- |
15 | Reconnect the VCIM C1 to the VCIM | -- | Go To Step 17 | Go To Step 16 |
Verify that there are no active inputs causing the VCIM to continue to stay awake. | ||||
Where there any? | ||||
16 | Replace the VCIM | -- | Go To Step 1 | -- |
17 | Diagnose and correct the concern found on this vehicle | -- | Go To Step 25 | -- |
18 | Remove the CTSY/LAMP fuse from the IBEC | -- | Go To Step 20 | Go to Step 19 |
Was the draw eliminated? | ||||
19 | Continue with Diagnostics on BCM fuse. | -- | -- | -- |
20 | Check for unwanted ground on CKT 1732. | -- | Go To Step 21 | Go To Step 22 |
BCM connector C4, Terminals D5 and E5 | ||||
BCM Connector C3, Terminal A3 | ||||
Was a problem found? | ||||
(The BCM monitors this circuit while in sleep mode, and even a small load or partial ground on this circuit can drop the signal voltage to below 4v, which wakes up the BCM. See ESI doc ID#1631200 and ID#1847612 for more information.) | ||||
21 | Diagnose and correct the concern found on this vehicle | -- | -- | -- |
22 | Check to see if this vehicle is equipped with a Garage Door Opener switch. | -- | Go To Step 23 | Go To Step 24 |
If so, were any of the switches found to be sticking? | ||||
23 | Replace Sunshade Assembly | -- | Go To Step 1 | -- |
24 | Continue with Diagnostics on Interior Lights Fuse | -- | -- | -- |
25 | Test the battery with the MidTronics tester, and follow the instructions provided. | -- | -- | -- |
Once the vehicle has been repaired and the battery recharged, return to customer. | ||||
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
