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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls - 2.6L & 3.2L - Diagnosis (DTC P0172 - P0446)) >> Diagnostic Trouble Codes >> DTC P0335 >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

The numbers below refer to the step numbers on the diagnostic table.

  1. 4:  This step tests for a short to voltage in a CKP sensor circuit between the ECM connector and the CKP connector when the key is off.
  2. 5:  This step tests for a short to voltage in a CKP sensor circuit and an ignition circuit between the ECM connector and the CKP connector.
DTC P0335

Step Action Values Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Engine Control Module (ECM) Connector End Views  or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check-Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 Attempt to start the engine.
Does the engine start and run?		 - Go to Step 3  Go to Step 4 
3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Does the DTC fail this ignition?		 - Go to Step 4  Go to Intermittent Conditions
4 
  1. Turn OFF the ignition.
  2. Disconnect the crankshaft position (CKP) sensor harness connector.
  3. Measure the voltage between a known good ground and each of the CKP sensor circuits at the controller side of the CKP harness connector.
Is the voltage more than the specified value?		 3 V Go to Step 12  Go to Step 5 
5 
  1. Turn ON the ignition, with the engine OFF.
  2. Connect the DMM to a known good ground and each of the CKP sensor circuits at the controller side of the CKP harness connector.
Is the voltage more than the specified value?		 3 V Go to Step 12  Go to Step 6 
6 Measure the resistance from the high circuit of the CKP sensor and the low circuit of the CKP sensor at the component side of the CKP harness connector with a DMM.
Is the resistance within the specified range?		 700-1100 ohm Go to Step 7  Go to Step 16 
7 Measure the resistance from the high circuit of the CKP sensor and the shielded ground circuit of the CKP sensor at the component side of the CKP harness connector with a DMM.
Does the DMM display the specified value?		 OL Go to Step 8  Go to Step 16 
8 Measure the resistance from the low circuit of the CKP sensor and the shielded ground circuit of the CKP sensor at the component side of the CKP harness connector with a DMM.
Does the DMM display the specified value?		 OL Go to Step 9  Go to Step 16 
9
  1. Connect the CKP sensor connector.
  2. Disconnect the engine control module (ECM) harness connector.
  3. Measure the resistance from the high circuit of the CKP sensor and the low circuit of the CKP sensor with a DMM.
Is the resistance within the specified range?		 700-1100 ohm Go to Step 10  Go to Step 14 
10 Measure the resistance from the high circuit of the CKP sensor and the shielded ground circuit of the CKP sensor with a DMM.
Does the DMM display the specified value?		 OL Go to Step 11  Go to Step 15 
11 Measure the resistance from the low circuit of the CKP sensor and the shielded ground circuit of the CKP sensor with a DMM.
Does the DMM display the specified value?		 OL Go to Step 20  Go to Step 15 
12
  1. Connect the CKP sensor connector.
  2. Disconnect the ECM harness connector.
  3. Measure the voltage between a good ground and each of the CKP sensor circuits at the ECM harness connector.
Is the voltage more than specified value?		 3 V Go to Step 13  Go to Step 20 
13 Repair the short to voltage in the affected CKP sensor circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 22  -
14 Repair the following conditions in the affected CKP sensor circuit:
  • An open
  • A high resistance
  • Circuits shorted together

Did you complete the repair?		 - Go to Step 22  -
15 Repair the short to ground in the affected CKP sensor circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 22  -
16 Inspect for poor connections at the CKP sensor harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 22  Go to Step 17 
17
IMPORTANT: If the sensor harness is damaged in any way, DO NOT repair the harness.
  1. Remove the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement and Diagnostic Aids.
  2. Inspect the CKP sensor and its harness for the following conditions:
    • Physical damage
    • Excessive play or looseness
    • Improper installation
    • Foreign material pressing between the CKP sensor and the reluctor ring.
    • Electromagnetic interference in the CKP sensor circuits
    • Excessive air gap between the CKP sensor and the reluctor ring
Did you find and correct the condition?		 - Go to Step 22  Go to Step 18 
18 Inspect the reluctor ring for the following conditions:
  • Physical damage
  • Improper installation
  • Excessive end play or looseness

Refer to Crankshaft and Bearings Removal in Engine Mechanical.
Did you find and correct the condition?		 - Go to Step 22  Go to Step 19 
19 Replace the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement .
Did you complete the replacement?		 - Go to Step 22  -
20 Inspect for poor connections at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. - Go to Step 22  Go to Step 21 
21 Replace the ECM. Refer to Engine Control Module (ECM) Replacement .
Did you complete the replacement?		 - Go to Step 22  -
22
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 - Go to Step 2  Go to Step 23 
23 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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