Diagnostic Aids
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- A condition with the charging system may cause this DTC to set. Refer to Charging System Test in Engine Electrical.
- For an intermittent condition, refer to Intermittent Conditions .
DTC P1660
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Is DTC P0560 set? | Go to DTC P0560 in Engine Electrical | Go to Step 3 |
| 3 | Observe the Output Driver Data List with a scan tool. Do any parameters indicate a fault present? |
Go to Step 4 | Go to Step 5 |
| 4 | Test for a short to voltage on the control circuit of the component that indicated a fault. Refer to Testing for a Short to Voltage
in Wiring Systems. Did you find and correct the condition? |
Go to Step 6 | Go to Step 5 |
| 5 | Replace the powertrain control module (PCM). Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 6 | - |
| 6 |
|
Go to Step 2 | Go to Step 7 |
| 7 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |