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HOMESERVICE MANUALSFORD2010FOCUS S, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - PINPOINT TEST KN: VARIABLE SPEED ELECTRIC COOLING FAN THROUGH PINPOINT TEST Z: INTERMITTENT - (EXCEPT DIESEL & HYBRID)PINPOINT TEST Z: INTERMITTENTINTRODUCTION
2010 Ford Focus S, Standard

Pinpoint Test Z: Intermittent: Introduction

2010 Ford Focus S, StandardSECTION Introduction
WARNING: CROWN VICTORIA POLICE INTERCEPTOR VEHICLES EQUIPPED WITH FIRE SUPPRESSION SYSTEM, REFER TO APPROPRIATE FIRE SUPPRESSION ARTICLE FOR IMPORTANT SAFETY WARNINGS . FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.

This pinpoint test is intended to diagnose and isolate intermittent concerns for all electronic engine control (EEC) subsystems.

This chart is used to determine which test to run for the suspect circuit. Parameter identifiers (PIDs) corresponding to each circuit are listed. Some circuits do not have an associated PID or the PID may not be available and has to be measured with a digital multimeter (DMM). More specific information on the PID can be found in Section 6. If the vehicle has a coil pack system with a no start condition, carry out the ignition test.

PCM PIDS/SIGNALS REFERENCE CHART

PCM/PIDS/SIGNALS Associated Circuit Test Type
APP1 APPS Input
APP2 APPS Input
APP3 APPS Input
BPP/BOO BPP Input
BPA BPS Input
Use DMM CD A-J (primary) Output
CAC_T CACT Input
CAC_V CACT Input
CHT CHT Input
CKP CKP Input
CMP CMP Input
CPP/PNP CPP Input
DPFEGR DPFE Input
ECT ECT Input
EGRMC1 EGRMC1 Output
EGRMC2 EGRMC2 Output
EGRMC3 EGRMC3 Output
EGRMC4 EGRMC4 Output
EGRMDSD EGRMC Output
EGRVR EGRVR Output
EOT EOT Input
EVAPCV CV Output
FANDC VDF Output
FANSS FANSS Input
FANVAR FCV Input
FLI FLI Input
FP FP Output
FP M FPM Input
FRP FRP Input
FRT FRT Input
FTP FTP Input
HFC HFC Output
IAC IAC Output
IAT IAT Input
IAT2 IAT 2 Input
IMRC IMRC Output
IMRC1M IMRCM Input
IMTV IMTV1 Output
KNOCK_1 KS1 Input
KNOCK_2 KS2 Input
LFC LFC Output
MAF, MAF V MAF Input
MAP V MAP Input
O2S11 HO2S11 Input
O2S12 HO2S12 Input
O2S13 HO2S13 Input
O2S21 HO2S21 Input
O2S22 HO2S22 Input
OSS OSS Input
PSP PSP Input
PSP_V PSP Input
PTO PTO Input
TACM (+) TACM (+) Output
TACM (-) TACM (-) Output
TIP_PRS_BOOST TCBP Input
TIP_PRS_V TCBP Input
TP1 TP1 Input
TP2 TP2 Input
TP TP Input
TURBO_BP1_STAT TCBY Output
TURBO_BP2_STAT TCBY2 Output
TURBO_WGATE TCWRVS Output
TWGATE_STAT TCWRVS Output
VCT1 VCT1 Output
VCT2 VCT2 Output
VPWR VPWR Input
Use DMM VREF Output
Use DMM VSO Output
VSS VSS+ Input
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.