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Home › Acura › 2003 › RSX Base, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Performance System Self-Diagnostics › Diagnostic Tests › DTC P0340 Or DTC P0344

DTC P0340 Or DTC P0344

Code Definition

  1. Perform ECM/PCM reset procedure. See ECM/PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Start engine. If DTCs P0340 or P0344 reset, go to next step. If none of listed DTCs reset, problem is intermittent. System is functioning properly at this time. Check for poor connection(s) or loose wire(s) between Camshaft Position (CMP) sensor 3-pin harness connector and Gray ECM/PCM 31-pin "A" harness connector.
  2. Turn ignition switch off. Disconnect CMP sensor 3-pin harness connector. Turn ignition switch on. Measure voltage between ground and CMP sensor 3-pin harness connector terminal No. 3 (Black/Yellow wire). See Fig 1 . If battery voltage is present, go to next step. If battery voltage is not present, check No. 4 ACG fuse (10-amp) in under-dash fuse/relay box. If fuse is okay, repair open in Black/Yellow wire between CMP sensor 3-pin harness connector terminal No. 3 and No. 4 ACG fuse (10-amp) in under-dash fuse/relay box.
    Fig 1: Identifying CMP Sensor 3-Pin Harness Connector
    G00110160Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Measure voltage between ground and CMP sensor 3-pin harness connector terminal No. 1 (Blue/White wire). If about 5 volts is present, go to next step. If about 5 volts is not present, go to step  6 .
  4. Measure voltage between CMP sensor 3-pin harness connector terminals No. 2 (Brown/Yellow wire) and 3 (Black/Yellow wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open in Brown/Yellow wire between CMP sensor 3-pin harness connector terminal No. 2 and ground terminal G101.
  5. Substitute known-good CMP sensor and recheck. If DTCs P0340 or P0344 reset, update ECM/PCM or substitute with known-good ECM/PCM. If symptom or indication goes away, replace original ECM/PCM. If DTCs P0340 or P0344 do not reset, replace original CMP sensor. See appropriate procedure under IGNITION SYSTEM in REMOVAL & INSTALLATION article.
  6. Measure voltage between ground and Gray ECM/PCM 31-pin "A" harness connector terminal No. 25 (Blue/White wire). If about 5 volts is not present, go to next step. If about 5 volts is present, repair open in Blue/White wire between Gray ECM/PCM 31-pin "A" harness connector terminal No. 25 and CMP sensor 3-pin harness connector terminal No. 1.
  7. Turn ignition switch off. Disconnect Gray ECM/PCM 31-pin "A" harness connector. Check for continuity between ground and Gray ECM/PCM 31-pin "A" harness connector terminal No. 25 (Blue/White wire). If continuity is present, repair short in Blue/White wire between Gray ECM/PCM 31-pin "A" harness connector terminal No. 25 and CMP sensor 3-pin harness connector terminal No. 1. If continuity is not present, update ECM/PCM or substitute with known-good ECM/PCM. If symptom or indication goes away, replace original ECM/PCM.
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