DTC P0715, P0717, P0718 [LA4AX-EL (CD4E)]

id0502a3806200

DTC P0715

Turbine shaft speed (TSS) sensor malfunction

DTC P0717

Turbine shaft speed (TSS) sensor signal is not input.

DTC P0718

Turbine shaft speed (TSS) sensor intermittent signal input

DETECTION CONDITION

• P0715: PCM detects insufficient TSS sensor signal while driving
• P0717: PCM detects that TSS sensor is not input while driving
• P0718: PCM detects intermittent TSS sensor signal input while driving

POSSIBLE CAUSE

• TSS sensor malfunction.
• Short to ground in wiring harness between TSS sensor terminal A (wiring harness-side) and PCM terminal 59 (wiring harness-side).
• Short to power supply in wiring harness between TSS sensor terminal A (wiring harness-side) and PCM terminal 34 (YF (2.0L Zetec) (2.0L Zetec))/59 (AJ (3.0L Duratec) (3.0L Duratec)) (wiring harness-side).
• Short to power supply in wiring harness between TSS sensor terminal B (wiring harness-side) and PCM terminal 23 (YF (2.0L Zetec) (2.0L Zetec))/3 (AJ (3.0L Duratec) (3.0L Duratec)) (wiring harness-side).
• Open circuit in wiring harness between TSS sensor terminal A (wiring harness-side) and PCM terminal 59 (wiring harness-side).
• Open circuit in wiring harness between TSS sensor terminal B (wiring harness-side) and body ground.
• Damaged connectors between TSS sensor and PCM.
• PCM malfunction.

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related Service Bulletins and or/on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT TSS SENSOR CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch to the LOCK position.
• Disconnect the TSS sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion)
• Is the connection normal?
Yes
Go to the next step.
No
Repair or replace connector and/or terminal, then go to Step 9.
4

INSPECT TSS SENSOR CIRCUIT FOR SHORT TO GROUND

• Inspect for continuity between TSS sensor connector A (wiring harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 9.
No
Go to the next step.
5

INSPECT PCM CONNECTOR FOR POOR CONNECTION

• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is the connection normal?
Yes
Go to the next step.
No
Repair or replace the connector and/or terminals, then go to Step 9.
6

INSPECT TSS SENSOR CIRCUIT FOR OPEN CIRCUIT

• Inspect the following TSS sensor terminals (wiring harness-side) and PCM terminals (wiring harness-side):
YF (2.0L Zetec) (2.0L Zetec)
- A and 34
- B and 23
AJ (3.0L Duratec) (3.0L Duratec)
- A and 59
- B and 3
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 9.
7

INSPECT TSS SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY

• Turn the ignition switch to the ON position (engine off).
• Inspect the voltage at TSS sensor terminals A and B (wiring harness-side).
• Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 9.
8

INSPECT TSS SENSOR

• Inspect the TSS sensor.
• Is TSS sensor normal?
Yes
Go to the next step.
No
Replace the TSS sensor, then go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P0715, P0717 OR P0718 COMPLETED
• Make sure to reconnect all the disconnected connectors.
• Clear the DTC from memory using the WDS or equivalent.
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
10
VERIFY DTCS
• Are except DTC P0715, P0717 and P0718 output?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.