DTC Troubleshooting: P1886 (35-1)

DTC P1886:  Problem in CVT Driven Pulley Speed Sensor Circuit

NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.

1.Check whether the DTC for manifold absolute pressure (MAP) sensor is indicated.

Is the DTC for MAP sensor indicated?


YES - Perform the MAP sensor troubleshooting, and recheck for DTC P1886 after troubleshooting.


NO - Go to 2.


2.Turn the ignition switch OFF.

3.Check for continuity between PCM connector terminal A23 and body ground, and between terminal A24 and body ground.

 

Is there continuity?


YES - Go to 4.


NO - Repair open in the wire PCM connector terminals A23 and A24, and ground (G101), or repair poor ground ( G101).n


4.Disconnect CVT driven pulley speed sensor connector.

5.Turn the ignition switch ON (II).

6.Measure the voltage between CVT driven pulley speed sensor connector terminal No. 1 and body ground.

 

Is there about 5 V?


YES - Go to 7.


NO - Go to 19.


7.Turn the ignition switch OFF.

8.Disconnect PCM connector C (22P).

9.Check for continuity between CVT driven pulley speed sensor connector terminal No. 2 and body ground.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector C15 and the CVT driven pulley speed sensor connector.n


NO - Go to 10.

10.Check for continuity between CVT driven pulley speed sensor connector terminal No. 3 and body ground.

 

Is there continuity?


YES - Go to 11.


NO - Repair open in the wire between the CVT driven pulley speed sensor connector terminal No. 3 and ground (G101), or repair poor ground ( G101).n


11.Reconnect PCM connector C (22P).

12.Turn the ignition switch ON (II).

13.Measure the voltage between CVT driven pulley speed sensor connector terminals No. 2 and No. 3.

 

Is there about 5 V?


YES - Go to 14.


NO - Go to 23.

14.Connect CVT driven pulley speed sensor connector.

15.Measure the voltage between PCM connector terminals C15 and A23 or A24.

 

Is there about 0 V or 5 V?


YES - Go to 16.


NO - Replace the   CVT   driven   pulley   speed   sensor.n


16.Shift to [P] position.

17.Start the engine, and let it idle.

18.With engine idling, measure the voltage between PCM connector terminals C15 and A23 or A24.

 

Is there 1.5-3.5 V?


YES - Update the PCM if it does not have the latest software, or subsutitute a known-good PCM, then recheck. If the symptom/ indication goes away with a known-good PCM, replace the original  PCM.n


NO - Replace the   CVT   driven   pulley   speed   sensor.n

19.Measure the voltage between PCM connector terminals A21 and A23 or A24.

 

Is there 4.75-5.25 V?


YES - Repair open in the wire between PCM connector terminal A21 and the CVT driven pulley speed sensor connector.n


NO - Go to 20.


20.Turn the ignition switch OFF.

21.Disconnect PCM connector A (31P).

22.Check for continuity between PCM connector terminal A21 and body ground.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector terminal A21 and the CVT driven pulley speed sensor connector.n


NO - Update the PCM if it does not have the latest software, or subsutitute a known-good PCM, then recheck. If the symptom/ indication goes away with a known-good PCM, replace the original  PCM.n

23.Measure the voltage between PCM connector terminals C15 and A23 or A24.

 

Is there about 5 V?


YES - Repair open in the wire between PCM connector terminal C15 and the CVT driven pulley speed sensor connector.n


NO - Update the PCM if it does not have the latest software, or subsutitute a known-good PCM, then recheck. If the symptom/ indication goes away with a known-good PCM, replace the original  PCM.n