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Honda Fit/Jazz - DTC Troubleshooting: P1888 (36-1) (L12A/L13A CVT)
Online Honda Fit/Jazz 2002-2005 Workshop repair manual used by professionals.
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Snip from the Manual
DTC Troubleshooting: P1888 (36-1)
DTC P1888: Problem in CVT 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 P1888 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.
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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 speed sensor connector.
5.Turn the ignition switch ON (II).
6.Measure the voltage between CVT speed sensor connector terminal No. 1 and body ground.
IMAGE REPLACED HERE
Is there about 5 V?
YES - Go to 7.
NO - Go to 18.
7.Turn the ignition switch OFF.
8.Disconnect PCM connector C (22P).
9.Check for continuity between CVT speed sensor connector terminal No. 2 and body ground.
IMAGE REPLACED HERE
Is there continuity?
YES - Repair short to ground in the wire between PCM connector C22 and the CVT speed sensor connector.n
NO - Go to 10.
10.Check for continuity between CVT speed sensor connector terminal No. 3 and body ground.
IMAGE REPLACED HERE
Is there continuity?
YES - Go to 11.
NO - Repair open in the wire between the CVT 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 speed sensor connector terminals No. 2 and No. 3.
IMAGE REPLACED HERE
Is there about 5 V?
YES - Go to 14.
NO - Go to 22.
14.Connect CVT speed sensor connector.
15.Measure the voltage between PCM connector terminals C22 and A23 or A24.
IMAGE REPLACED HERE
Is there about 0 V or 5 V?
YES - Go to 16.
NO - Replace the CVT speed sensor.n
16.Lift up the vehicle, and allow the wheels to rotate freely.
17.With driving the vehicle, measure the voltage between PCM connector terminals C22 and A23 or A24.
IMAGE REPLACED HERE
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 speed sensor.n
18.Measure the voltage between PCM connector terminals A21 and A23 or A24.
IMAGE REPLACED HERE
Is there 4.75-5.25 V?
YES - Repair open in the wire between PCM connector terminal A21 and the CVT speed sensor connector.n
NO - Go to 19.
19.Turn the ignition switch OFF.
20.Disconnect PCM connector A (31P).
21.Check for continuity between PCM connector terminal A21 and body ground.
IMAGE REPLACED HERE
Is there continuity?
YES - Repair short to ground in the wire between PCM connector terminal A21 and the CVT 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
22.Measure the voltage between PCM connector terminals C22 and A23 or A24.
IMAGE REPLACED HERE
Is there about 5 V?
YES - Repair open in the wire between PCM connector terminal C22 and the CVT 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
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