DTC P1706: Open In Transmission Range Switch Circuit

WARNING: This page is about a different car, the 2004 Honda Odyssey, 2003 Honda Odyssey, and 2002 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Record all freeze data and review General Troubleshooting Information (see 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.

Test the transmission range switch (see Transmission Range Switch Test ).
Is the switch OK?

YES - Go to step 2.

NO - Replace the transmission range switch (see Transmission Range Switch Replacement ).
Turn the ignition switch OFF.
Check for continuity between PCM connector terminals B20 and body ground, and between B22 and body ground.
Is there continuity?

YES - Go to step 4.

NO - Repair open in the wire between PCM connector terminals B20, B22, and ground (G101), or repair poor ground (G101).

Fig 1: Checking Continuity Between PCM Connector Terminals B20 & Body Ground, And Between B22 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch ON (II).
Shift to the D position.
Measure the voltage between PCM connector terminals D9 and B20 or B22.
Is there voltage?

YES - Repair open in the wire between PCM connector terminal D9 and the transmission range switch.

NO - Go to step 7.

Fig 2: Measuring Voltage Between PCM Connector Terminals D9 & B20 Or B22
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Shift to the R position.
Measure the voltage between PCM connector terminals D6 and B20 or B22.
Is there voltage?

YES - Repair open in the wire between PCM connector terminal D6 and the transmission range switch.

NO - Go to step 9.

Fig 3: Measuring Voltage Between PCM Connector Terminals D6 & B20 Or B22
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Shift to the P and N position.
Measure the voltage between PCM connector terminals B14 and B20 or B22.
Is there voltage?

YES - Repair open in the wire between PCM connector terminal B14 and the transmission range switch.

NO - Go to step 11.

Fig 4: Measuring Voltage Between PCM Connector Terminals B14 & B20 Or B22
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Shift to the D3 position.
Measure the voltage between PCM connector terminals D8 and B20 or B22.
Is there voltage?

YES - Repair open in the wire between PCM connector terminal D8 and the transmission range switch.

NO - Go to step 13.

Fig 5: Measuring Voltage Between PCM Connector Terminals D8 & B20 Or B22
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Shift to the 2 position.
Measure the voltage between PCM connector terminals D14 and B20 or B22.
Is there voltage?

YES - Repair open in the wire between PCM connector terminal D14 and the transmission range switch.

NO - Go to step 15.

Fig 6: Measuring Voltage Between PCM Connector Terminals D14 & B20 Or B22
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Shift to the 1 position.
Measure the voltage between PCM connector terminals D15 and B20 or B22.
Is there voltage?

YES - Repair open in the wire between PCM connector terminal D15 and the transmission range switch.

NO - Check for loose terminal fit in the PCM connectors If necessary, substitute a known-good PCM and recheck.

Fig 7: Measuring Voltage Between PCM Connector Terminals D15 & B20 Or B22
Courtesy of AMERICAN HONDA MOTOR CO., INC.