DTC P0706: Open in Transmission Range Switch Circuit

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the GENERAL TROUBLESHOOTING INFORMATION
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

Make sure the shift cable is adjusted properly (see SHIFT CABLE ADJUSTMENT ).
Turn the ignition switch to ON (II).

Compare the ATPP, ATPR, ATPN, ATPD, ATPS, ATPFWD, and ATPRVS inputs with the HDS to the following table, in each shift lever position.

	ATPP	ATPR	ATPN	ATPD	ATPS	ATP FWD	ATP RVS
P	◦	X	X	X	X	X	X
R	X	◦	X	X	X	X	◦
N	X	X	◦	X	X	X	X
D	X	X	X	◦	X	◦	X
S	X	X	X	X	◦	◦	X
◦: ON X: OFF

Do the transmission range switch signals match?

YES -Intermittent failure, the system is OK at this time.

NO -Go to step 4.

Compare the ATPP, ATPR, ATPN, ATPD, ATPS, ATPFWD, and ATPRVS inputs with the HDS to the table in step 3, in each shift lever position.
Do all signals remain OFF?

YES -Go to step 14.

NO -Record the input that incorrectly indicated ON, then go to step 5.
Turn the ignition switch to LOCK (0).
Disconnect the transmission range switch connector.
Connect the transmission range switch connector terminal which did not indicate ON in step 4 to body ground with a jumper wire.
Turn the ignition switch to ON (II).
Check the transmission range switch signal that did not indicate ON with the HDS.
Does the transmission range switch signal indicate ON?

YES -Replace the transmission range switch (see TRANSMISSION RANGE SWITCH REPLACEMENT ).

NO -Go to step 10.
Turn the ignition switch to LOCK (0).
Jump the SCS line with the HDS.
Disconnect PCM connector A (49P) or C (49P).

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

	ATP P	ATP R	ATP N	ATP D	ATP S	ATP FWD	ATP RVS
PCM	A16	C25	C26	C17	C46	C18	C19
Transmission range switch	7	8	4	9	10	5	1

Is there continuity?

YES -Replace the PCM (see PCM REPLACEMENT ).

NO -Repair an open in the wire between the corresponding transmission range switch connector terminal and the PCM.

Turn the ignition switch to LOCK (0).
Disconnect the transmission range switch connector.
Check for continuity between transmission range switch connector terminal No. 6 and body ground.

Fig 1: Checking For Continuity Between Transmission Range Switch Connector Terminal No. 6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Replace the transmission range switch (see TRANSMISSION RANGE SWITCH REPLACEMENT ).

NO -Repair an open in the wire between the transmission range switch and body ground (G101) (see CONNECTOR TO FUSE/RELAY BOX INDEX ), or repair poor body ground (G101).