DTC P0340 [LF, L3]


DTC P0340	Camshaft position (CMP) sensor circuit malfunction
DETECTION CONDITION	• The PCM monitors the input voltage from the CMP sensor when the engine is running. If the PCM does not receive the input voltage from the CMP sensor while the PCM receives input signal from the CKP sensor, the PCM determines that the CMP circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. • The PENDING CODE is available if the PCM detects the above malfunction condition. • The FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• CMP sensor malfunction • Connector or terminal malfunction • The CMP sensor is dirty • Short to power circuit between CMP sensor terminal A and PCM terminal 2M • Short to power circuit between CMP sensor terminal B and PCM terminal 2J • Short to ground circuit between CMP sensor terminal A and PCM terminal 2M • Short to ground circuit between CMP sensor terminal B and PCM terminal 2J • Open circuit between CMP sensor terminal A and PCM terminal 2M • Open circuit between CMP sensor terminal B and PCM terminal 2J • CKP sensor pulse wheel malfunction • Both CMP sensor wires are shorted to each other • CKP sensor misinstallation • Timing chain misinstallation • Loose timing chain or improper valve timing due to chain jumping • Loose camshaft sprocket lock bolt • Loose crankshaft pulley lock bolt


STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY CMP SENSOR VOLTAGE • Disconnect the CMP sensor connector. • Connect voltmeter between CMP sensor connector terminals A and B (sensor-side). • Inspect the voltage in the AC range while cranking the engine. • Is there any the voltage reading?	Yes	Go to the next step.
3		No	Go to step 10.
4	INSPECT CMP SENSOR FOR POOR CONNECTION • Verify that the CMP sensor connector is connected securely. • Is the connector normal?	Yes	Go to the next step.
4		No	Reconnect the connector, then go to Step 15.
5	INSPECT CMP CIRCUIT FOR SHORT TO POWER • Turn the ignition switch to the OFF position. • Disconnect the CMP sensor connector. • Turn the ignition switch to the ON position (Engine off) • Measure the voltage at CMP sensor terminals A and B. • Is there any the voltage reading?	Yes	Repair or replace the suspected wiring harness, then go to Step 15.
5		No	Go to the next step.
6	INSPECT CMP CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between the following terminals and body ground: - CMP sensor connector terminal A (harness-side) - CMP sensor connector terminal B (harness-side) • Is there continuity?	Yes	Repair or replace the suspected wiring harness, then go to Step 15.
6		No	Go to the next step.
7	INSPECT CMP CIRCUITS FOR SHORT CIRCUIT • Inspect for continuity between CMP sensor connector terminals A and B (harness-side). • Is there continuity?	Yes	Repair or replace the suspected wiring harness, then go to Step 15.
7		No	Go to the next step.
8	INSPECT PCM FOR POOR CONNECTION • Disconnect the PCM connector. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction?	Yes	Repair the terminal, then go to Step 15.
8		No	Go to the next step.
9	INSPECT CMP CIRCUIT for an open circuit CIRCUIT • Inspect the continuity between following circuits: - The CMP sensor terminal A (harness-side) and the PCM terminal 2M (harness-side) - The CMP sensor terminal B (harness-side) and the PCM terminal 2J (harness-side) • Is there continuity?	Yes	Go to Step 11.
9		No	Repair or replace the suspected wiring harness, then go to Step 15.
10	INSPECT CMP SENSOR • Turn the ignition switch to the OFF position. • Perform the CMP sensor inspection. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [LF, L3].) • Is the CMP sensor normal?	Yes	Go to Step 15.
10		No	Replace the CMP sensor and go to step 15.
11	VERIFY CKP SENSOR INSTALLATION • Verify the CKP sensor installation. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [LF, L3].) • Is the CKP sensor installed correctly?	Yes	Go to the next step.
11		No	Reinstall the CKP sensor and go to Step 15.
12	VERIFY VALVE TIMING MECHANISM INSTALLATION • Verify the valve timing mechanism installation for following parts: - Timing chain misinstallation - Loose camshaft sprocket lock bolt - Loose crankshaft pulley lock bolt • Is the valve timing mechanism installed correctly?	Yes	L3: Go to the next step. L8, LF: Go to Step 15.
12		No	Reinstall the valve timing mechanism and go to Step 15.
13	INSPECT STOPPER PIN MECHANISM • Remove the timing chain. • Inspect the stopper pin. (See VARIABLE VALVE TIMING ACTUATOR INSPECTION [L3].) • Is the stopper pin mechanism normal?	Yes	Go to the next step.
13		No	Replace the variable valve timing actuator, then go to Step 15.
14	INSPECT ROTOR POSITION • Remove the variable valve timing actuator. (See VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [L3].) • Is the rotor position at maximum valve timing retard?	Yes	VARIABLE VALVE TIMING MECHANISM IS NORMAL Note • This DTC is detected as an intermittent concern. • An intermittent concern might be removed by the cleaning mode of the variable valve timing control function. Go to the next step.
14		No	Replace the variable valve timing actuator, then go to the next step.
15	VERIFY TROUBLESHOOTING OF DTC P0340 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Access the MAF PID using the WDS or equivalent. Note • The MAF PID should indicate 1.95 g/s {0.25 lb/min.} or above during this test • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [LF, L3].)
15		No	Go to the next step.
16	VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [LF, L3].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [LF, L3].)
16		No	Troubleshooting completed.