I have here the diagnostic procedures for the problem.
DTCS P1381 & P1382 - CYLINDER POSITION - (CYP) SENSOR
NOTE: DTC P1381 indicates intermittent interruption in CYP sensor circuit. DTC P1382 indicates no signal in CYP sensor circuit.
1. Perform PCM reset procedure. Start engine. If DTCs P1381 and/or P1382 are not present, system is okay at this time. Failure is intermittent. Check for poor connections or loose wires between CYP connector and PCM connectors. If DTCs P1381 and/or P1382 are present, turn ignition off. Disconnect distributor connector.
2. On Accord (F22B1 engine), measure resistance between sensor terminals No. 4 (CYPP) and No. 5 (CYPM). See Fig. 12 . On Accord (F22B2 engine) and Prelude, measure resistance between sensor terminals No. 2 (CYPP) and No. 4 (CYPM). See Fig. 13 . On Accord, resistance should be 800-1500 ohms. On Prelude, resistance should be 500-1000 ohms.
3. If resistance is not as specified, replace distributor. If resistance is as specified, check for continuity between ground and CYP sensor terminals No. 2 and 4 (Accord F22B1) or terminals No. 4 and 5 (Accord F22B2 and Prelude) individually. See Fig. 12 or Fig. 13 . If continuity exists, replace distributor.
4. If continuity exists, reconnect distributor connector. Disconnect PCM connector "C". See Fig. 4 . Measure resistance between PCM connector terminals C4 and C14 If resistance is not 800-1500 ohms, repair open in appropriate wire(s). See WIRING DIAGRAMS section.
5. If resistance is 800-1500 ohms, check for continuity between ground and PCM connector terminals C4. If continuity exists, repair short in appropriate wire(s). If continuity does not exist, substitute a known-good PCM and recheck. If symptom or problem goes away, replace original PCM.
Tuesday, October 10th, 2017 AT 5:08 PM