DTC Troubleshooting: P1885 (34-1)

DTC P1885:  Problem in CVT Drive Pulley Speed Sensor Circuit

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

1.Check whether the DTC for throttle position sensor (TPS) is indicated.

Is the DTC for TPS indicated?


YES - Perform the TPS troubleshooting, and recheck for DTC P1885 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 drive pulley speed sensor connector.

5.Turn the ignition switch ON (II).

6.Measure the voltage between CVT drive 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 drive pulley speed sensor connector terminal No. 2 and body ground.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector C7 and the CVT drive pulley speed sensor connector.n


NO - Go to 10.

10.Check for continuity between CVT drive 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 drive 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 drive 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 drive pulley speed sensor connector.

15.Measure the voltage between PCM connector terminals C7 and A23 or A24.

 

Is there about 0 V or 5 V?


YES - Go to 16.


NO - Replace the CVT  drive 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 C7 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  drive pulley speed sensor.n

19.Measure the voltage between PCM connector terminals A20 and A23 or A24.

 

Is there 4.75-5.25 V?


YES - Repair open in the wire between PCM connector terminal A20 and the CVT drive 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 A20 and body ground.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector terminal A20 and the CVT drive 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 C7 and A23 or A24.

 

Is there about 5 V?


YES - Repair open in the wire between PCM connector terminal C7 and the CVT drive 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