DTC Troubleshooting: P0812 (62-2) (A/T)

DTC Troubleshooting: P0812 (62-2)

DTC P0812:

Open in Transmission Range Switch ATP RVS Switch Circuit

NOTE:

Record all freeze data and review General Troubleshooting Information before you troubleshoot.
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1.	Turn the ignition switch ON (II).

2.	Shift the shift lever into the [R] position, and verify the A/T R SWITCH signal with the PGM Tester or HDS in the A/T data list. Is the A/T R SWITCH ON? YES - Go to 3. NO - Inspect the end of the selector control shaft, adjust the shift cable, then recheck.n

3.	Check the REVERSE SWITCH signal with the PGM Tester or HDS. Is the REVERSE SWITCH ON? YES - Intermittent failure, the system is OK at this time.n NO - Go to 4.

4.	Turn the ignition switch OFF.

5.	Check for continuity between PCM connector terminals A8 and body ground, and between A9 and body ground. Is there continuity? YES - Go to 6. NO - Repair open in the wires between PCM connector terminals A8, A9, and ground (G101), and repair poor ground (G101).n

6.	Turn the ignition switch ON (II).

7.	Shift to the [R] position.

Measure the voltage between PCM connector terminals C12 and A8 or A9.

Is there voltage?

YES - Go to 9.

NO - Check for loose or poor connections at PCM connector terminal C12. If the connections are OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.n

9.	Turn the ignition switch OFF.

10.	Disconnect the transmission range switch connector.

11.

Check for continuity between the No. 1 and No. 10 terminals at the transmission range switch. The shift position must be [R].

Is there continuity?

YES - Repair open in the wire between PCM connector terminal C12 and the transmission range switch.n

NO - Replace the transmission range switch. After replacing the switch, go to 12, and check that the repair has been completed.

12.	Clear the DTC in CLEAR MENU with Honda PGM Tester or HDS.

13.	Test-drive the vehicle for several minutes under the same conditions as those indicated by the freeze data.

14.	Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0812. Did the result pass? YES - The problem has been corrected.n NO - Return to step 1 and recheck.n