Honda CR-V (2006–2011) Service Manual / Transaxle / Automatic Transmission / DTC Troubleshooting / DTC P2122: Accelerator Pedal Position (APP)Sensor A (Throttle Position Sensor D) CircuitLow Voltage Input
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
1. Clear the DTC with the HDS.
2. Turn the ignition switch ON.
3. Check whether DTC P2122 is indicated in the DTCs/Freeze Data in PGM-FI Mode Menu with the HDS.
Is DTC P2122 indicated in the PGM-FI system? YES-Troubleshoot for DTC P2122 in the PGM-FI System.
NO-Go to step 4.
4. Check whether DTC P2122 is indicated in the DTCs/Freeze Data in A/T Mode Menu with the HDS.
Is DTC P2122 indicated?YES-Go to step 5.
NO-Intermittent failure, the system is OK at this time.
5. Update the A/T software in the PCM if it does nothave the latest software (see page 14-9), orsubstitute a known-good PCM.
6. Turn the ignition switch ON (II).
7. Check for DTC(s) in the DTCs/Freeze Data in A/TMode Menu with the HDS.
Is DTC P2122 indicated?YES-If the PCM was updated, substitute a known-goodPCM (see page 14-10), then recheck. If thePCM was substituted, go to step 1.
NO-Go to step 8.
8. Monitor the OBD STATUS for P2122 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED? YES-If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see page 11-219). If any other DTCs were indicated on step 7, go to the indicated DTC's troubleshooting.
NO-If the HDS indicates FAILED, check for poorconnections and loose terminals at acceleratorpedal position sensor A and the PCM. If the PCMwas updated, substitute a known-good PCM(see page 14-10), then recheck. If the PCM wassubstituted, go to step 1. If the HDS indicates NOTCOMPLETED, return to step 6 and recheck.
DTC P2123: Accelerator Pedal Position (APP)Sensor A (Throttle Position Sensor D) CircuitHigh Voltage Input
NOTE: Before you troubleshoot, record all freeze dataand any on-board snapshot, and review GeneralTroubleshooting Information (see page 14-4),1, Clear the DTC with the HDS,2, Turn the ignition switch ON (II),3. Check whether DTC P2123 is indicated in the DTCs/Freeze Data in PGM-FI Mode Menu with the HDS,Is DTC P2123indicated in the PGM-FI system?YES-Troubleshoot for DTC P2123 in the PGM-FI System.
NO-Go to step 4.
4. Check whether DTC P2123 is indicated in the DTCs/Freeze Data in A/T Mode Menu with the HDS.
Is DTC P2123 indicated? YES-Go to step 5, NO-Intermittent failure, the system is OK at this time.
5. Update the A/T software in the PCM if it does nothave the latest software (see page 14-9), orsubstitute a known-good PCM.
6, Turn the ignition switch ON (II) ,7. Check for DTC(s) in the DTCs/Freeze Data in A/TMode Menu with the HDS.
Is DTC P2123 indicated?YES-If the PCM was updated, substitute a known-goodPCM (see page 14-10), then recheck, If the PCM was substituted, go to step 1,NO-Go to step 8,8, Monitor the OBD STATUS for P2123 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED? YES-If the PCM was updated, troubleshooting is complete, If the PCM was substituted, replace the original PCM (see page 11-219). If any other DTCs were indicated on step 7, go to the indicated DTC's troubleshooting.
NO-If the HDS indicates FAILED, check for poorconnections and loose terminals at acceleratorpedal position sensor A and the PCM, If the PCMwas updated, substitute a known-good PCM(see page 14-10), then recheck. If the PCM wassubstituted, go to step 1. If the HDS indicates NOTCOMPLETED, return to step 6 and recheck,
DTC U0028: F-CAN Communication CircuitError (F-CAN Bus OFF)
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
1. Clear the DTC with the HDS.
2. Turn the ignition switch ON (II).
3. Check whether DTC U0155 is indicated in the DTCs/Freeze Data in PGM-FI Mode Menu with the HDS.
Is DTC U0155 indicated in the PGM-FI system? YES-Troubleshoot for DTC U0155 in the PGM-FI System.
NO-Go to step 4.
4. Check whether DTC U0028 is indicated in the DTCs/Freeze Data in A/T Mode Menu with the HDS.
Is DTC U0028 indicated?YES-Go to step 5.
NO-Intermittent failure, the system is OK at this time.
5. Update the A/T software in the PCM if it does nothave the latest software (see page 14-9), orsubstitute a known-good PCM.
6. Turn the ignition switch ON (II).
7. Check for DTC(s) in the DTCs/Freeze Data in A/TMode Menu with the HDS.
Is DTC U0028 indicated?YES-If the PCM was updated, substitute a known-goodPCM (see page 14-10), then recheck. If thePCM was substituted, go to step 1.
NO-Go to step 8.
8. Monitor the OBD STATUS for U0028 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED? YES-If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see page 11-219). If any other DTCs were indicated on step 7, go to the indicated DTC's troubleshooting.
NO-If the HDS indicates FAILED, check for poorconnections and loose terminals at the PCM andthe connectors on the F-CAN circuit. If the PCM wasupdated, substitute a known-good PCM (see page14-10), then recheck. If the PCM was substituted, goto step 1. If the HDS indicates NOT COMPLETED,return to step 6 and recheck.
DTC U0122: Lost Communication with VSAControl Unit
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
1. Clear the DTC with the HDS.
2. Turn the ignition switch ON (II).
3. Check that DTC U0122 recurs.
Is DTC U0122 indicated?YES-Go to step 4.
NO-Intermittent failure, the system is OK at this time.
4. Check whether any DTC is indicated in the DTCs/Freeze Data in VSA Mode Menu with the HDS.
Is any DTC indicated in the VSA? YES-Troubleshoot for the indicated DTC in the VSA system.
NO-Go to step 5.
5. Turn the ignition switch OFF.
6. Jump the SCS line with the HDS.
7. Disconnect PCM connector A (44P).
8. Disconnect the VSA modulator-control unitconnector.
9. Check for continuity between PCM connectorterminal A36 and VSA modulator-control unitconnector terminal No. 39, and between A37 andterminal No. 38.
Is there continuity?YES-Go to step 10.
NO-Go to step 14.
10. Update the A/T software in the PCM if it does nothave the latest software (see page 14-9), orsubstitute a known-good PCM.
11. Turn the ignition switch ON (II).
12. Check for DTC(s) in the DTCs/Freeze Data in A/TMode Menu with the HDS.
Is DTC U0122 indicated?YES-If the PCM was updated, substitute a known-goodPCM (see page 14-10), then recheck. If thePCM was substituted, go to step l.
NO-Go to step 13.
13. Monitor the OBD STATUS for U0122 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED? YES-If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see page 11-219). If any other DTCs were indicated on step 12, go to the indicated DTC's troubleshooting.
NO-If the HDS indicates FAILED, check for poorconnections and loose terminals at the VSAmodulator-control unit the PCM. If the PCM wasupdated, substitute a known-good PCM (see page14-10), then recheck. If the PCM was substituted, goto step 1. If the HDS indicates NOT COMPLETED,keep idling until a result comes on.
14. Check the communication line between the VSAmodulator-control unit and the gauge controlmodule with the HDS.
Is there an open or poor connection in the F-CANline between the V SA modulator-control unit and gauge control module? YES-Repair open in the wires between the VSA modulator-control unit connector and CAN communication lines.
NO-Substitute a known-good VSA modulator-control unit (see page 19-97), then recheck. If the symptom/indication goes away with a known-good VSA modulator-control unit, replace the original VSA modulator-control unit.
DTC U0155: Lost Communication with GaugeControl Module
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
1. Clear the DTC with the HDS.
2. Turn the ignition switch ON (II).
3. Check whether DTC U0155 is indicated in the DTCs/Freeze Data in PGM-FI Mode Menu with the HDS.
Is DTC U0155 indicated in the PGM-FI system? YES-Troubleshoot for DTC U0155 in the PGM-FI System.
NO-Go to step 4.
4. Check whether the DTC U0155 is indicated in theDTCs/Freeze Data in A/T Mode Menu with the HDS.
Is DTC U0155 indicated?YES-Go to step 5.
NO-Intermittent failure, the system is OK at this time.
5. Update the A/T software in the PCM if it does nothave the latest software (see page 14-9), orsubstitute a known-good PCM (see page 14-10).
6. Turn the ignition switch ON (II).
7. Check for DTC(s) in the DTCs/Freeze Data in A/TMode Menu with the HDS.
Is DTC U0155 indicated?YES-If the PCM was updated, substitute a known-goodPCM (see page 14-10), then recheck. If thePCM was substituted, go to step 1.
NO-Go to step 8.
8. Monitor the OBO STATUS for U0155 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED? YES-If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see page 11-219). If any other DTCs were indicated on step 7, go to the indicated DTC's troubleshooting.
NO-If the HDS indicates FAILED, check for poorconnections and loose terminals at the gaugecontrol module and the PCM. If the PCM wasupdated, substitute a known-good PCM (see page14-10), then recheck. If the PCM was substituted, goto step 1. If the HDS indicates NOT COMPLETED,keep idling until a result comes on.
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