DTC Troubleshooting: P0715 (15-1)

DTC P0715:  Problem in Input Shaft (Mainshaft) Speed Sensor Circuit

KU, KU-H, KN, KM, KT, KP, KW, FO, MA, PH, IN, and KZ Models


NOTE: Record all freeze data before you troubleshoot.

1.Check the fuel and emissions system problem is indicated by the DTC.

Is there any fuel and emissions DTC?


YES - Perform the troubleshooting flowchart for the indicated code(s). Recheck for code P0715 after troubleshooting.n


NO - Go to 2.


2.Turn the ignition switch OFF.

3.Disconnect the battery negative terminal.

4.Disconnect PCM connector A (31P).

5.Check for continuity between PCM connector terminals A23 and body ground, and between A24 and body ground.

 

Is there continuity?


YES - Go to 6.


NO - Repair open in the wires between PCM connector terminals A23 and ground ( G101), between A24 and ground (G101), and repair poor ground (G101).n

6.Connect PCM connector A (31P).

7.Connect the battery negative terminal.

8.Disconnect the input shaft (mainshaft) speed sensor connector.

9.Turn the ignition switch ON (II).

10.Measure the voltage between the No. 1 terminal of the input shaft (mainshaft) speed sensor connector and body ground.

 

Is there about 5 V?


YES - Go to 11.


NO - Go to 24.


11.Turn the ignition switch OFF.

12.Disconnect input shaft (mainshaft) speed sensor connector.

13.Check for continuity between the No. 2 terminal of the input shaft (mainshaft) speed sensor connector and body ground.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector terminal C7 and input shaft (mainshaft) speed sensor connector.n


NO - Go to 14.


14.Disconnect the battery negative terminal.

15.Disconnect PCM connector C (22P).

16.Check for continuity between the No. 3 terminal of the input shaft (mainshaft) speed sensor connector and PCM connector terminal C7.

 

Is there continuity?


YES - Go to 17.


NO - Repair open in the wire between the input shaft (mainshaft) speed sensor connector and PCM connector terminal C7.n


17.Connect the battery negative terminal.

18.Turn the ignition switch ON (II).

19.Measure the voltage between the No. 2 and No. 3 terminals of the input shaft (mainshaft) speed sensor connector.

 

Is there about 5 V?


YES - Go to 20.


NO - Go to 29.


20.Connect the input shaft (mainshaft) speed sensor connector.

21.Measure the voltage between PCM connector terminals C7 and A23 or A24.

 

Is the voltage 0 V or about 5 V?


YES - Go to 22.


NO - Replace the input shaft (mainshaft) speed sensor.n


22.Shift to P position. Start the engine, and run it at idle.

23.With engine idling, measure the voltage between PCM connector terminals C7 and A23 or A24.

 

Is there 1.5-3.5 V?


YES - Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good  PCM and recheck.n


NO - Replace the inpurt shaft (mainshaft) speed sensor.n


24.Measure the voltage between PCM connector terminals A20 and A23 or A24.

 

Is there 4.75-5.25 V?


YES - Repair open in the wire between PCM connector terminal A20 and the input shaft (mainshaft) speed sensor connector.n


NO - Go to 25.


25.Turn the ignition switch OFF.

26.Disconnect the battery negative terminal.

27.Disconnect PCM connector A (31P).

28.Check for continuity between PCM connector A20 and body ground.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector terminal A20 and the input shaft (mainshaft) speed sensor connector.n


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


29.Measure the voltage between PCM connector terminals C7 and A23 or A24.

 

Is there about 5 V?


YES - Repair open or short in the wire between PCM connector C7 and the input shaft (mainshaft) speed sensor connector.n


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