Your Vehicle: 2001 Ford Escort ZX2 L4-2.0L DOHC VIN 3
 
Vehicle » Powertrain Management » Computers and Control Systems » Testing and Inspection » Pinpoint Tests » TA: Park/Neutral Position (PNP)/Clutch Pedal Position (CPP) Switches - Pinpoint Test  
 
 
  TA: Park/Neutral Position (PNP)/Clutch Pedal Position (CPP) Switches - Pinpoint Test  
 

TA: Park/Neutral Position (PNP)/Clutch Pedal Position (CPP) Switches

TA: Introduction See: TA: Park/Neutral Position (PNP)/Clutch Pedal Position (CPP) Switches - Introduction

TA1 CHECK CPP OR PNP SWITCH FUNCTION

P0704, P1709
Note: During KOEO Self-Test, clutch pedal must be down or gearshift lever in NEUTRAL.

  • Key off.
  • Connect scan tool.
  • Key on, engine off.
  • Access CPP/PNP PID and observe PID cycling ON/OFF with clutch pedal up, then down or gear shift lever in gear, then NEUTRAL.

Does reading change from ON to OFF?
Yes

  • Fault intermittent DISCONNECT PCM. INSPECT both ends of the

connector for damaged or pushed out pins, corrosion, loose wires. REPAIR as
necessary. If OK, REPLACE PCM (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM) See: Programming and Relearning\Flash Electrically Eraseable Programmable Read Only Memory - Flash EEPROM).

No

  • GO to TA2

.

TA2 CHECK CPP OR PNP SWITCH RESISTANCE

  • Key off.
  • Locate the CPP switch or the PNP switch near the transmission shift linkage.
  • Inspect switch and bracket for damage, bent or broken conditions. Repair as required.
  • Disconnect CPP or PNP harness connector.
  • Measure the CPP or PNP switch resistance with the clutch pedal down.

Is the resistance less than 5.0 ohms?
Yes

  • GO to TA3

.

No

  • REPLACE the CPP or PNP switch.

TA3 CHECK CPP/PNP CIRCUIT FOR OPEN IN HARNESS

Note: Refer to the PCM connector pin numbers in the beginning of this pinpoint test.

  • Disconnect scan tool.
  • Disconnect PCM.
  • Measure resistance of the (CPP/PNP) circuit between PCM harness connector pin and CPP or PNP switch harness connector.
  • Where applicable, measure resistance of the SIG RTN circuit between PCM harness connector pin and CPP or PNP switch harness connector.

Are both resistances less than 5.0 ohms?
Yes

  • GO to TA4

.

No

  • REPAIR open circuit.

TA4 CHECK CPP OR PNP CIRCUIT FOR SHORT TO SIG RTN OR CHASSIS GROUND IN HARNESS

  • Measure resistance between CPP and SIG RTN circuits at the PCM harness connector.
  • Measure resistance of CPP circuit between PCM harness connector pin and chassis ground.

Are both resistances greater than 10,000 ohms?
Yes

No

  • REPAIR short circuit.

TA5 CHECK CPP/PNP SWITCH FUNCTION

P0704, P1705, P1709
Note: During Self Test, clutch pedal must be down and gearshift lever in NEUTRAL.

  • Key off.
  • Connect scan tool.
  • Key on, engine off.
  • Look for CPP/PNP PID cycling ON/OFF with:
  • Transmission in NEUTRAL, then shift into gear and the clutch pedal up.
  • Transmission in GEAR and the clutch pedal up then down.

Does reading change from ON to OFF for both switches?

  

Yes

  • Fault intermittent DISCONNECT PCM. INSPECT both ends of the

connector for damaged or pushed out pins, corrosion and loose wires. REPAIR
as necessary. If OK, REPLACE PCM (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM) See: Programming and Relearning\Flash Electrically Eraseable Programmable Read Only Memory - Flash EEPROM).

No

  • GO to TA6

.

TA6 CHECK CPP/PNP SWITCHES RESISTANCE

  • The CPP switch is near the clutch pedal and the PNP switch is near the transmission shift linkage.
  • Inspect both switches and brackets for damage. Repair as required.
  • Disconnect CPP and PNP harness connector.
  • Measure CPP switch resistance with the clutch pedal down.
  • Measure PNP switch resistance with the shift lever in NEUTRAL.

Is the resistance less than 5.0 ohms for both switches?
Yes

  • GO to TA7

.

No

  • REPLACE damaged CPP or PNP switch.

TA7 CHECK CPP/PNP CIRCUIT FOR OPEN IN HARNESS

Note: Refer to the PCM connector pin numbers in the beginning of this pinpoint test.

  • Disconnect scan tool.
  • Disconnect PCM.
  • Measure resistance of the SIG RTN circuit between PCM harness connector pin and CPP or PNP switch harness connector.
  • Measure resistance of the CPP/PNP circuit between PCM harness connector pin and CPP or PNP switch harness connector.

Are both resistances less than 5.0 ohms?
Yes

  • GO to TA8

.

No

  • REPAIR open circuit.

TA8 CHECK CPP/PNP CIRCUIT FOR SHORT TO SIG RTN OR CHASSIS GROUND IN HARNESS

  • Measure resistance between CPP/PNP and SIG RTN circuits at the PCM harness connector.
  • Measure resistance of CPP/PNP circuit between the PCM harness connector pin and chassis ground.

Are both resistances greater than 10,000 ohms?
Yes

No

  • REPAIR short circuit.