Reverse Lock System Circuit Troubleshooting

Check whether the OBD II scan tool indicates P1705 or P1706.
Does the OBD II scan tool indicate either code?
1. YES - Perform the troubleshooting flowchart for the indicated code(s).
2. NO - Go to step 2.
Turn the ignition switch OFF.
Shift the shift lever into the P position while pushing the shift lock release.
Turn the ignition switch ON (II).
Press the brake pedal, and do not press the accelerator pedal.
Shift the shift lever out of the P position to check that the shift lock solenoid operates.
Does the shift lever shift out of the P position?
1. YES - Go to step 7.
2. NO - Perform the troubleshooting flowchart for the Shift Lock System Circuit. See Shift Lock System Circuit Troubleshooting .
Turn the ignition switch OFF.
Remove the shift lock relay.
Check for continuity between the No. 1 and No. 4 terminals of the shift lock relay while connecting the battery positive terminal to the No. 5 terminal of the shift lock relay, and connecting the negative terminal to the No. 3 terminal.

Fig 1: Identifying Shift Lock Relay
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there no continuity when connecting the battery terminals, and continuity when disconnecting the battery terminals?
1. YES - Go to step 10.
2. NO - Replace the shift lock relay.
Shift the shift lever into the N position.
Check the continuity between the No. 4 terminal of the shift lock relay socket and body ground.

Fig 2: Checking Continuity Between No. 4 Terminal, Shift Lock Relay Socket & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Go to step 12.
2. NO - Repair open in the wire between the No. 4 terminal of the shift lock relay and the transmission range switch.
Shift the shift lever out of the N position.
Check for continuity between the No. 4 terminal of the shift lock relay socket and body ground.

Fig 3: Checking Continuity Between No. 4 Terminal Shift Lock Relay Socket & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Repair short to ground in the wire between the No. 4 terminal of the shift lock relay and the transmission range switch.
2. NO - Go to step 14.
Check for continuity between the No. 1 terminal of the shift lock relay socket and the No. 2 terminal of the shift lock solenoid connector.

Fig 4: Checking Continuity Between No. 1 Terminal, Shift Lock Relay Socket & No. 2 Terminal, Shift Lock Solenoid Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Check for loose terminal fit in the connectors. Repair the reverse lock mechanism.
2. NO - Repair open in the wire between the No. 1 terminal of the shift lock relay and the shift lock solenoid connector.