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 (see GENERAL TROUBLESHOOTING INFORMATION ).
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

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

Compare the ATPP, ATPR, ATPN, ATPD, ATP2, ATP1, ATPFWD, and ATPRVS inputs with the HDS to the following table, in each gear position.

ATPP, ATPR, ATPN, ATPD, ATP2, ATP1, ATPFWD, AND ATPRVS INPUTS

	ATPP	ATPR	ATPN	ATPD	ATP2	ATP1	ATP FWD	ATP RVS
P	O	X	X	X	X	X	X	O
R	X	O	X	X	X	X	X	O
N	X	X	O	X	X	X	X	O
D	X	X	X	O	X	X	O	X
2	X	X	X	X	O	X	O	X
1	X	X	X	X	X	O	O	X
O: 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, ATP2, ATP1, ATPFWD, and ATPRVS inputs with the HDS to the table in step 3, in each gear position.
Do all shift positions remain OFF?

YES -Go to step 14.

NO -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 which did not indicate ON with the HDS.
Does the transmission range switch 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 connectors A (49P) or C (49P).

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

CONTINUITY REFERENCE CHART

	ATPP	ATPR	ATPN	ATPD	ATP2	ATP1	ATP FWD	ATP RVS
PCM	A16	C25	C26	C17	C46	C35	C18	C19
Range Switch	7	8	3	9	4	10	5	2

Is there continuity?

YES -Replace the PCM (see PCM REPLACEMENT ).

NO -Repair open in the wire between the transmission range switch 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 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 open in the wire between the transmission range switch and ground (G101), or repair poor ground (G101).