DTC Troubleshooting: P1708
DTC P1708: Neutral Position Sensor B Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P1708 Neutral Position Sensor B Circuit High Voltage
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P1708 Neutral Position Sensor B Circuit High Voltage
    

Is DTC P1708 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the neutral position sensor and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
DTC check:

DTC check
?1.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0852 Neutral Position Sensor A Circuit High Voltage
    
P1708 Neutral Position Sensor B Circuit High Voltage
    

Are DTC P0852 and P1708 indicated at the same time?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 5.
3.
Determine possible failure area (neutral position sensor, others):

Determine possible failure area (neutral position sensor, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Neutral position sensor 4P connector

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Neutral position sensor 4P connector: disconnected
Test point 1
Neutral position sensor 4P connector (female terminals) No. 1:
Test point 2
Neutral position sensor 4P connector (female terminals) No. 2:


Is there about 5.0 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Open wire check (SG NSS line):

Open wire check (SG NSS line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector No. 1 (96P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Neutral position sensor 4P connector: disconnected
 
PCM connector No. 1 (96P): disconnected
Test point 1
Neutral position sensor 4P connector (female terminals) No. 2:
Test point 2
PCM connector No. 1 (96P) No. 84


Is there continuity?

     
YES
     
     
     
The SG NSS wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P1708 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the SG NSS wire between PCM connector No. 1 terminal No. 84 and the neutral position sensor.?
5.
Shorted wire check (NSS2 line to power):

Shorted wire check (NSS2 line to power)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connectors.
PCM connector No. 1 (96P)
Neutral position sensor 4P connector

?4.
Turn the vehicle to the ON mode.

?5.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
PCM connector No. 1 (96P): disconnected
 
Neutral position sensor 4P connector: disconnected
Test point 1
Neutral position sensor 4P connector (female terminals) No. 4:
Test point 2
Body ground


Is there any voltage?

     
YES
     
     
     
Repair a short to power in the NSS2 wire between PCM connector No. 1 terminal No. 28 and the neutral position sensor.?
     
NO
     
     
     
Go to step 6.
6.
Open wire check (NSS2 line):

Open wire check (NSS2 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
PCM connector No. 1 (96P): disconnected
 
Neutral position sensor 4P connector: disconnected
Test point 1
Neutral position sensor 4P connector (female terminals) No. 4:
Test point 2
PCM connector No. 1 (96P) No. 28


Is there continuity?

     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
Repair an open in the NSS2 wire between PCM connector No. 1 terminal No. 28 and the neutral position sensor.?
7.
PCM check:

PCM check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Reconnect the following connector.
PCM connector No. 1 (96P)

?3.
Connect terminals A and B with a jumper wire.
Terminal A
Neutral position sensor 4P connector (female terminals) No. 2:
Terminal B
Neutral position sensor 4P connector (female terminals) No. 4:


?4.
Turn the vehicle to the ON mode.

?5.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
NEUTRAL POSITION SENSOR 2
    

Is about 0 V indicated?

     
YES
     
     
     
     
NO
     
     
     
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P1708 goes away and the PCM was substituted, replace the original PCM.?