Shift Position Indicator Circuit Troubleshooting

A/T Gear Position Indicator Circuit Troubleshooting 

NOTE:  Check for CVT system DTCs. If any DTCs are present, troubleshoot those first.

CVT System 

DTC (CVT)

• 1. Shift cable adjustment check:

  - 1. Make sure the shift cable is properly adjusted .

  Is the shift cable adjusted properly?

  YES 

  The shift cable adjustment is OK. Go to step 2.

  NO 

  Adjust the shift cable , then recheck.

• 2. Gauge control module lost of communication DTC check:

  - 1. Check for DTCs in BODY ELECTRICAL with the HDS.

  DTC Description	DTC
  U0100 Gauge control module lost communication with PCM

  Is DTC U0100 indicated?

  YES 

  Go to DTC U0100 troubleshooting in the gauge control module .

  NO 

  Go to step 3.

• 3. Shift position indicator drive circuit check:

  - 1. Check the shift position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function .

  Does the shift position indicator blink while checking?

  YES 

  Go to step 4.

  NO 

  Failure of shift position indicator drive circuit in the gauge control module, replace the gauge control module .

• 4. Transmission range switch signal check 1:

  - 1. Turn the vehicle to the ON mode.

  - 2. Compare the transmission range switch signal inputs with the HDS to the following table, in each shift lever position/mode.

  Signal	Threshold						Current conditions
  	P	R	N	D	S	L	Values	Unit
  A/T P Switch	ON	OFF	OFF	OFF	OFF	OFF
  A/T R Switch	OFF	ON	OFF	OFF	OFF	OFF
  A/T N Switch	OFF	OFF	ON	OFF	OFF	OFF
  A/T D Switch	OFF	OFF	OFF	ON	OFF	OFF
  A/T S Switch	OFF	OFF	OFF	OFF	ON	OFF
  A/T L Switch	OFF	OFF	OFF	OFF	OFF	ON

  Do the transmission range switch signals match?

  YES 

  The transmission range switch signal is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If the symptom goes away, replace the original PCM .

  NO 

  Go to step 5.

• 5. Transmission range switch signal check 2:

  - 1. Compare the transmission range switch signal inputs with the HDS to the following table, in each shift lever position/mode.

  Signal	Threshold						Current conditions
  	P	R	N	D	S	L	Values	Unit
  A/T P Switch	ON	OFF	OFF	OFF	OFF	OFF
  A/T R Switch	OFF	ON	OFF	OFF	OFF	OFF
  A/T N Switch	OFF	OFF	ON	OFF	OFF	OFF
  A/T D Switch	OFF	OFF	OFF	ON	OFF	OFF
  A/T S Switch	OFF	OFF	OFF	OFF	ON	OFF
  A/T L Switch	OFF	OFF	OFF	OFF	OFF	ON

  Do all signals remain OFF?

  YES 

  Go to step 8.

  NO 

  Record the abnormal circuit, then go to step 6.

• 6. Transmission range switch check:

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Disconnect the following connector.

  Transmission range switch 10P connector

  - 3. Connect the transmission range switch 10P connector terminal that incorrectly indicates ON in step 5 to body ground with a jumper wire; refer to the following table.

  Signal	Transmission range switch 10P connector
  	Terminal number	Terminal name
  A/T P Switch	5	ATP-P
  A/T R Switch	4	ATP-R
  A/T N Switch	9	ATP-N
  A/T D Switch	3	ATP-D
  A/T S Switch	8	ATP-S
  A/T L Switch	2	ATP-L

  Courtesy of HONDA, U.S.A., INC.

  - 4. Turn the vehicle to the ON mode.

  - 5. Check the parameter(s) below that did not indicate ON with the HDS.

  Signal	Threshold						Current conditions
  	P	R	N	D	S	L	Values	Unit
  A/T P Switch	ON	OFF	OFF	OFF	OFF	OFF
  A/T R Switch	OFF	ON	OFF	OFF	OFF	OFF
  A/T N Switch	OFF	OFF	ON	OFF	OFF	OFF

  Signal	Threshold						Current conditions
  	P	R	N	D	S	L	Values	Unit
  A/T D Switch	OFF	OFF	OFF	ON	OFF	OFF
  A/T S Switch	OFF	OFF	OFF	OFF	ON	OFF
  A/T L Switch	OFF	OFF	OFF	OFF	OFF	ON

  Does the transmission range switch indicate ON?

  YES 

  Replace the transmission range switch .

  NO 

  The transmission range switch is OK. Go to step 7.

• 7. Open wire check (corresponding line):

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

  SCS Short

  - 3. Disconnect the following connector.

  PCM connector C (51P)

  - 4. Check for continuity between the transmission range switch connector terminal and the PCM terminal of the input which indicated OFF. Refer to the following table.

  	ATP-P	ATP-R	ATP-N	ATP-D	ATP-S	ATP-L
  PCM	C34	C27	C24	C25	C43	C44
  Transmission range switch	5	4	9	3	8	2

  Courtesy of HONDA, U.S.A., INC.

  Is there continuity?

  YES 

  The transmission range switch signal is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If the symptom goes away, replace the original PCM .

  NO 

  Repair an open in the wire between the corresponding transmission range switch connector terminal and the PCM.

• 8. Open wire check (PG line):

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Disconnect the following connector.

  Transmission range switch 10P connector

  - 3. Check for continuity between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	Transmission range switch 10P connector: disconnected

  Test point 1	Transmission range switch 10P connector No. 1
  Test point 2	Body ground

  Courtesy of HONDA, U.S.A., INC.

  Is there continuity?

  YES 

  The PG wire is OK, replace the transmission range switch .

  NO 

  Repair an open in the PG wire between the transmission range switch and body ground (G101), or repair poor body ground (G101).