SMU - Revised Diagnostic Tables for DTCs P0342 and P0343

Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?

--

Go to Step 2

Go to A Powertrain On Board Diagnostic (OBD) System Check

2

1. Install a scan tool.
2. Idle the engine.
3. Monitor the CAM signal input - High to Low transition in the Engine Data List 1 using the scan tool.

Does the scan tool parameter increment?

--

Go to Step 3

Go to Step 4

1. Turn ON the ignition leaving the engine OFF.
2. Review the Freeze Frame and/or Failure Records data for this DTC and observe the parameters.
3. Turn OFF the ignition for 15 seconds.
4. Idle the engine.
5. Operate the vehicle within the conditions required for this diagnostic to run, and as close to the conditions recorded in Freeze Frame/Failure Records as possible. Special operating conditions that you need to meet before the PCM will run this diagnostic, where applicable, are listed in Conditions for Setting the DTC.
6. Select the Diagnostic Trouble Code (DTC) option, the Specific DTC option, then enter the DTC number using the scan tool.

Does the scan tool indicate that this diagnostic failed this ignition?

--

Go to Step 4

Go to Diagnostic Aids

4

1. Disconnect both PCM connectors. Refer to PCM/TAC Module Replacement.
2. Jumper the Camshaft Position sensor ground circuit at the PCM connector C1 (sensor side) to a known good ground.
3. Jumper the Camshaft Position sensor ignition feed circuit at the PCM connector C2 (sensor side) to B+ using a fused jumper wire. Refer to Using Fused Jumper Wires in Wiring Systems.
4. Probe the Camshaft Position sensor signal circuit with one lead of the DMM J 39200 and connect the other lead to a ground.
5. Select the duty cycle option on the DMM J 39200.
6. Crank the engine.

Does the DMM display a duty cycle within the specified range?

45-55%

Go to Step 17

Go to Step 5

5

1. Turn OFF the ignition.
2. Reconnect the PCM connectors. Refer to PCM/TAC Module Replacement.
3. Remove the intake manifold in order to gain access to the Camshaft Position sensor. Refer to Intake Manifold Replacement in Engine Mechanical-5.7L.
4. Disconnect the Camshaft Position sensor electrical connector.
5. Turn ON the ignition leaving the engine OFF.
6. Measure the voltage from the Camshaft Position sensor B+ supply circuit to the battery ground using the DMM J 39200 .

Does the DMM display the specified voltage?

B+

Go to Step 6

Go to Step 8

6

Measure the voltage from the Camshaft Position sensor B+supply circuit to the Camshaft Position sensor ground circuit using the DMM J 39200.

Does the DMM display the specified voltage?

B+

Go to Step 9

Go to Step 7

Test for an open in the Camshaft Position sensor ground circuit. Refer to Testing for Continuity in Wiring Systems.

Did you find an open ground circuit?

--

Go to Step 13

Go to Step 17

Test for an open or a short to ground in the Camshaft Position sensor B+ reference circuit. Refer to Testing for Continuity in Wiring Systems.

Did you find the circuit open or shorted to a ground?

--

Go to Step 12

Go to Step 17

9

1. Turn ON the ignition leaving the engine OFF.
2. Measure the voltage at the Camshaft Position sensor signal circuit to ground using the DMM J 39200.

Is the voltage less than the specified value?

1V

Go to Step 10

Go to Step 14

10

Probe the CMP signal circuit using the test light J 34142-B connected to battery voltage.

Does the test lamp illuminate?

--

Go to Step 15

Go to Step 11

1. Turn OFF the ignition.
2. Disconnect the PCM connector C1 located on the same side as the manufacturer's logo. Refer to PCM/TAC Module Replacement.
3. Test the continuity of the signal circuit from the sensor harness connector to the PCM using the DMM J 39200. Refer to Testing for Continuity in Wiring Systems.

Is the resistance less than the specified value?

2ohms

Go to Step 18

Go to Step 16

Repair the open or short to ground in the Camshaft Position sensor B+reference circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?

--

Go to Step 20

--

Repair the open in the Camshaft Position sensor ground circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?

--

Go to Step 20

--

Repair the short to voltage in the Camshaft Position sensor signal circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?

--

Go to Step 20

--

Repair the short to ground in the Camshaft Position sensor signal circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?

--

Go to Step 20

--

Repair the open in the Camshaft Position sensor signal circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?

--

Go to Step 20

--

1. Inspect for poor connections at the PCM. Refer to Testing for Intermittent and Poor Connections in Wiring Systems.
2. If you find a poor connection, repair as necessary. Refer to Repairing Connector Terminals in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 20

Go to Step 19

Replace the Camshaft Position sensor. Refer to Camshaft Position (CMP) Sensor Replacement.

Is the action complete?

--

Go to Step 20

--

Important: Program the replacement PCM. Refer to PCM/TAC Module Replacement.

Replace the PCM.

Is the action complete?

--

Go to Step 20

--

1. Select the Diagnostic Trouble Code (DTC) option and the Clear DTC Information option using the scan tool.
2. Idle the engine at the normal operating temperature.
3. Select the Diagnostic Trouble Code (DTC) option and the Specific DTC option, then enter the DTC number using the scan tool.
4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text, if applicable.

Does the scan tool indicate that this test ran and passed?

--

Go to Step 21

Go to Step 2

Select the Capture Info option and the Review Info option using the scan tool.

Does the scan tool display any DTCs that you have not diagnosed?

--

Go to applicable DTC Table

System OK