Diagnostic Aids
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The following table illustrates the ECM connector locations:
DTC P0335
| ECM Connector Location | |
|---|---|
| C2 | C1 |
| Front of Vehicle | |
- Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector. Using this kit prevents damage to the harness or component terminals.
- The ECM uses the camshaft position sensors to determine engine speed and position when there is a CKP sensor condition.
- The engine will operate with a CKP sensor condition only if the ECM has stored the learned reference position of the camshafts in memory. With a crankshaft position sensor condition other than a short to voltage in the signal circuit, the engine will go into a limp home mode after a hard restart. The ECM then calculates engine speed from one of the camshaft position sensors. During a limp home mode the following additional DTCs may set and should be ignored:
- DTC P0324 Knock Sensor (KS) Module Performance
- DTC P1011 Intake Camshaft Position Actuator Park Position Bank 1
- A short to voltage in the signal circuit of the CKP sensor will cause the engine to stall or not start and a DTC will not set.
- An intermittent condition in the CMP actuator solenoid circuits can cause a CKP DTC to set. Inspect the CMP actuator solenoid harness connections and related wiring, if you suspect this condition.
- The ECM uses a pull-up voltage of 2.5 volts on each CKP sensor circuit to reduce noise interference from electromagnetic interference (EMI). If the voltage is not present, replace the ECM.
- For an intermittent condition, refer to Intermittent Conditions .