2010 Cadillac Truck SRX FWD V6-3.0L Page 1004

2010 Cadillac Truck SRX FWD V6-3.0L Page 1004

switch.

瀚慖f not the specified range, replace the S87 fuel economy mode switch.

5. With the fuel economy mode switch button depressed, test for 486-538 ohm between 5 V reference voltage circuit terminal 9 and ground

circuit terminal 2 of the S87 fuel economy mode switch.

瀚慖f not the specified range, replace the S87 fuel economy mode switch.

6. Disconnect the X2 harness connector at the ECM.

7. Test for less than 5 ohm between 5 V reference voltage circuit terminal 14 of the ECM harness connector and 5 V reference voltage circuit

terminal 9 of the fuel economy mode switch harness connector.

瀚慖f greater than the specified value, repair the 5 V reference voltage circuit as necessary.

8. Test for less than 5 ohm between signal circuit terminal 29 of the ECM harness connector and signal circuit terminal 10 of the fuel economy

mode switch harness connector.

瀚慖f greater than the specified value, repair the signal circuit as necessary.

9. If all circuits test normal, replace the K20 ECM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning)for ECM replacement, setup and programming

P0016

DTC P0016, P0017, P0018, or P0019 (LF1, LFW)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0016

- Crankshaft Position - Intake Camshaft Position Not Plausible Bank 1

DTC P0017

- Crankshaft Position - Exhaust Camshaft Position Not Plausible Bank 1

DTC P0018

- Crankshaft Position - Intake Camshaft Position Not Plausible Bank 2

DTC P0019

- Crankshaft Position - Exhaust Camshaft Position Not Plausible Bank 2

Circuit/System Description

The engine control module (ECM) uses the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor pulses to monitor the

correlation between the crankshaft and the camshaft position. An improper relative position can be caused by either engine timing or improper

indexing of the camshaft drive chain.

Conditions for Running the DTC

* DTC P0335, P0336, P0338, P0340, P0341, P0345, P0346, P0365, P0366, P0390, P0391, P0641, and P0651 are not set.

* The engine is operating.

* The crankshaft and camshaft position signals are synchronized.

* The camshaft position actuator is in the parked position.

* DTC P0016, P0017, P0018, and P0019 run continuously once the above conditions are met.

Conditions for Setting the DTC