How to test a 2004 Honda Civic cps sensor with a voltmeter

Tiny
BGEARS
  • MEMBER
  • 2004 HONDA CIVIC
  • 170,000 MILES
Code po335 car stalling
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Thursday, March 8th, 2012 AT 10:48 PM

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Tiny
HMAC300
  • EXPERT
First take #6 fuse out from underhood box for 10 secondsto reset ecm. Start car and see if it still does it. DTC P0335: CKP SENSOR NO SIGNAL, DTC P0336: CKP SENSOR INTERMITTENT INTERRUPTION, DTC P0339: CKP SENSOR INTERMITTENT INTERRUPTI

NOTE: ? Information marked with an asterisk (*) applies to '01 03 models.
? Information marked with an asterisk (**) applies to '04 model.

1. Reset the ECM/PCM (see HOW TO RESET THE ECM/PCM ).
2. Start the engine.

Is DTC P0335 and/or P0336* (P0339)* indicated?

YES Go to step 3.
NO Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and at the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the CKP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between CKP sensor 3P connector terminal No. 3 and body ground.

Fig. 82: Measuring Voltage Between CKP Sensor 3P Connector Terminal No. 3 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO, INC.

Is there battery voltage?

YES Go to step 7.
NO Repair open in the wire between PGM FI main relay 1 and the CKP sensor.
7. Measure voltage between CKP sensor 3P connector terminal No. 1 and body ground.

Fig. 83: Measuring Voltage Between CKP Sensor 3P Connector Terminal No. 1 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO, INC.

Is there about 5 V?
YES Repair open in the wire between the ECM/PCM (A7) and the CKP sensor.
NO Go to step 11.
11. Turn the ignition switch OFF.
12. Disconnect ECM/PCM connector A (31P).
13. Check for continuity between ECM/PCM connector terminal A7 and body ground.

Fig. 86: Checking Continuity Between ECM/PCM Connector Terminal A7 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO, INC.

Is there continuity?

YES Repair short in the wire between the ECM/PCM (A7) and the CKP sensor.
NO Update the ECM/PCM if it does not have the latest software, or substitute a known good ECM/PCM, then recheck (see HOW TO SUBSTITUTE OR REPLACE THE ECM/PCM ). If the
symptom/indication goes away with a known good ECM/PCM, replace the original ECM/PCM.
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Thursday, March 8th, 2012 AT 11:35 PM

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