DTC P0340 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME010200100W20

DTC P0340

Camshaft position (CMP) sensor circuit malfunction

DETECTION CONDITION

• PCM monitors input voltage from CMP sensor when the engine is running. If CMP sensor signal timing inferred from CKP sensor signal has deviated. PCM determines that CMP circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• CMP sensor malfunction
• Connector or terminal malfunction
• CMP sensor is dirty
• Short to ground circuit between CMP sensor terminal A and PCM terminal 28
• Short to ground circuit between CMP sensor terminal B and PCM terminal 2
• Short to power circuit between CMP sensor terminal A to PCM terminal 28
• Short to power circuit between CMP sensor terminal B to PCM terminal 2
• Open circuit between CMP sensor terminal A and PCM terminal 28
• Open circuit between CMP sensor terminal B and PCM terminal 2
• Improper installation of timing chain
• Both CMP sensor wires are shorted each other
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CMP SENSOR VOLTAGE
• Disconnect CMP sensor connector.
• Connect voltmeter between CMP sensor connector terminals A and B (sensor-side).
• Check the voltage in AC range while cranking the engine.
• Is there any voltage reading?
Yes
Go to step 5.
No
Go to the next step.
4
CHECK CMP CIRCUIT RESISTANCE
• Turn the ignition switch off.
• Inspect the CMP sensor.
• Is the CMP sensor normal?
Yes
Check camshaft pulley for damage. Replace pulley and go to Step 12.
No
Replace CMP sensor, then go to Step 12.
5
CHECK CMP CIRCUIT FOR SHORT TO GROUND
• Disconnect CMP sensor connector.
• Check continuity between following terminal and body ground:
- CMP sensor connector terminal A (harness-side)
- CMP sensor connector terminal B (harness-side)
• Is there continuity?
Yes
Repair or replace suspected harness, then go to Step 12.
No
Go to the next step.
6
INSPECT CMP CIRCUITS FOR SHORT CIRCUIT
• Check continuity between CMP sensor connector terminals A and B (harness-side).
• Is there continuity?
Yes
Repair or replace suspected harness, then go to Step 12.
No
Go to step 9.
7
INSPECT POOR CONNECTION OF CMP SENSOR CONNECTOR
• Verify that the CMP sensor connector is connected securely.
• Is connector normal?
Yes
Go to the next step.
No
Reconnect the connector, then go to Step 12.
8
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the ignition switch off.
• Disconnect PCM connector.
• Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 12.
No
Go to the next step.
9
INSPECT CMP CIRCUIT FOR OPEN
• Disconnect CMP sensor connector.
• Connect the PCM connector.
• Check continuity between following circuits:
- CMP sensor terminal A (harness-side) and PCM terminal 28
- CMP sensor terminal B (harness-side) and PCM terminal 2
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace suspected harness, then go to Step 12.
10
CHECK CMP SENSOR RESISTANCE
• Inspect the CMP sensor.
• Is the CMP sensor normal?
Yes
Check for poor connection (damaged, pulled-out terminals, corrosion, etc.) or bent terminal of CMP sensor connector.
• Repair if necessary, then go to the next step.
No
Replace CMP sensor and then go to the next step.
11
TIMING CHAIN INSTALLATION
• Verify timing chain installation.
• Is timing chain installed properly?
Yes
Go to the next step.
No
Reinstall timing chain, then go to the next step.
12
VERIFY TROUBLESHOOTING OF DTC P0340 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn key ON (Engine off).
• Clear the DTC from the memory using the WDS or equivalent.
• Start engine.
• Access MAF PID using the WDS or equivalent.
Note
• MAF PID should indicate above 2.70 g/s {0.356 lb/min} during this test.
• Is pending code of same DTC present?
Yes
Replace PCM, then go to the next step.
No
Go to the next step.
13
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.