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DTC P0340 [L3]

BME010200300218

DTC P0340 | Camshaft position (CMP) sensor circuit malfunction
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DETECTION CONDITION | • PCM monitors input voltage from CMP sensor when engine is running. If PCM does not receive input voltage from CMP sensor while PCM receives input signal from CKP sensor, PCM determines that CMP circuit has malfunction. Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is available if 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 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
• Both CMP sensor wires short each other
• CKP sensor pulse wheel malfunction
• CKP sensor misinstallation
• Timing chain misinstallation
• Loose timing chain or improper valve timing
• Loose camshaft sprocket lock bolt
• Loose crankshaft pulley lock bolt
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to available Service Information. • If 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 the next step.
No | Go to step 10.
4 | 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 13.
5 | INSPECT CMP CIRCUIT FOR SHORT TO POWER • Turn the ignition switch off. • Disconnect CMP sensor connector. • Turn the ignition switch to the ON position (Engine off) • Measure voltage at CMP sensor terminals A and B
• Is there any voltage reading?
Yes
Repair or replace suspected harness, then go to Step 13.
No | Go to the next step.
6 | INSPECT CMP CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between following terminal and body ground:

  - CMP sensor connector terminal A (wiring harness-side)
  - CMP sensor connector terminal B (wiring harness-side)

• Is there continuity?
Yes
Repair or replace suspected harness, then go to Step 13.
No | Go to the next step.
7 | INSPECT CMP CIRCUITS FOR SHORTS • Inspect for continuity between CMP sensor connector terminals A and B (wiring harness-side). • Is there continuity? | Yes | Repair or replace suspected harness, then go to Step 13.
No | Go to the next step.
8 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Disconnect PCM connector. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there malfunction? | Yes | Repair terminal, then go to Step 13.
No | Go to the next step.
9 | INSPECT CMP CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between following circuits:

  - CMP sensor terminal A (wiring harness-side) and PCM terminal 2M (wiring harness-side)
  - CMP sensor terminal B (wiring harness-side) and PCM terminal 2J (wiring harness-side)

• Is there continuity?
Yes
Go to Step 11.
No | Repair or replace suspected harness, then go to Step 13.
10 | INSPECT CMP SENSOR • Turn the ignition switch off. • Perform CMP sensor inspection. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L3].) • Is CMP sensor normal? | Yes | Go to the Step 13.
No | Replace CMP sensor, then go to Step 13.
11 | VERIFY CKP SENSOR INSTALLATION • Verify CKP sensor installation. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3].) • Is CKP sensor installed correctly? | Yes | Go to the next step.
No | Reinstall CKP sensor and go to Step 13.
12 | VERIFY VALVE TIMING MECHANISM INSTALLATION • Verify valve timing mechanism installation for following parts:

  - Timing chain misinstallation
  - Loose camshaft sprocket lock bolt
  - Loose crankshaft pulley lock bolt

• Is valve timing mechanism installed correctly?
Yes

Go to the next step.

No | Reinstall valve timing mechanism and go to the next step.
13 | VERIFY TROUBLESHOOTING OF DTC P0340 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the ignition switch to the ON position (Engine off). • Clear DTC from PCM memory using WDS or equivalent. • Start engine.
• Access MAF PID using WDS or equivalent.

  Note

  • MAF PID should indicate 1.95 g/s {0.25 lb/min.} or above during this test

• Is same DTC present?
Yes
Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to the next step.
14 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3].)
No | Troubleshooting completed.