DTC P0340: CMP Sensor A No Signal (2004-2005 models); DTC P0344: CMP Sensor A Circuit Intermittent Interruption (2004-2005 models); DTC P1361: CMP (TDC) Sensor A Circuit Intermittent Interruption (2000-2003 models); DTC P1362: CMP (TDC) Sensor A No Signal (2000-2003 models)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Honda S2000, 2004 Honda S2000, 2003 Honda S2000, 2002 Honda S2000, and 2001 Honda S2000. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Information marked with an asterisk (*) applies to 2004-2005 models.
Information marked with double asterisk (**) applies to 2000-2003 models.
Before you troubleshoot, record all freeze data and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Reset the ECM (see HOW TO RESET THE ECM ).
Start the engine.
Is DTC P0344* (P1361)** or P0340* (P1362)** indicated?
1. YES - Go to step 3.
2. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at CMP (TDC) sensor A and at the ECM.
Turn the ignition switch OFF.
Disconnect CMP (TDC) sensor A 2P connector.
At the sensor side, measure resistance between CMP (TDC) sensor 2P connector terminals No. 1 and No. 2.

Fig 1: Measuring Resistance Between CMP (TDC) Sensor 2P Connector Terminals No. 1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 1,850-2,450 Ω?
1. YES - Go to step 6.
2. NO - Replace CMP (TDC) sensor A (see COMPONENT LOCATION INDEX ).
At the sensor side, check for continuity to body ground on both terminals individually.

Fig 2: Checking Continuity Body Ground Both Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Replace CMP (TDC) sensor A (see COMPONENT LOCATION INDEX ).
2. NO - Go to step 7.
Reconnect CMP (TDC) sensor A 2P connector.
Disconnect ECM connector C (31P).
Measure resistance between ECM connector terminals C20 and C21.

Fig 3: Measuring Resistance Between ECM Connector Terminals C20 And C21
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 1,850-2,450 Ω?
1. YES - Go to step 10.
2. NO - Repair open or short in the faulty sensor wire(s).
Check for continuity between body ground and ECM connector terminal C20.

Fig 4: Checking Continuity Between Body Ground And ECM Connector Terminal C20
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Repair short to body ground in the faulty sensor wire(s).
2. NO - Substitute a known-good ECM (see HOW TO SUBSTITUTE THE ECM FOR TESTING PURPOSES ) and recheck. If the symptom/indication goes away, replace the original ECM (see ECM REPLACEMENT ).