DTC P0706: Open in Transmission Range Switch Circuit

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review 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, ATPL, ATPFWD, and ATPRVS inputs with the HDS to the following table, in each shift lever position.

ATPP, ATPR, ATPN, ATPD, ATPL, ATPFWD AND ATPRVS INPUTS REFERENCE CHART

	ATP P	ATP R	ATP N	ATP D	ATP L	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
L	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, ATPL, 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 did not indicate 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.

TRANSMISSION RANGE SWITCH CONNECTOR TERMINAL REFERENCE CHART

	ATP P	ATP R	ATP N	ATP D	ATP L	ATP FWD	ATP RVS
PCM	A16	C25	C26	C17	C46	C18	C19
Transmission range switch	9	8	2	7	6	1	5

Is there continuity?

YES -Update the PCM if it does not have the latest software (see PCM UPDATE ). If the PCM was updated, 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. 10 and body ground.

Fig 1: Checking For Continuity Between Transmission Range Switch Connector Terminal No. 10 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 ENGINE WIRE HARNESS (ENGINE SECTION) (D) ), or repair poor body ground (G101).