Engine Controls - Reference Values - (Hybrid): Diagnosis Ford Escape I facelift 2

Reference Value Symptom Chart

The Reference Value Symptom Chart provides guidance in selecting the appropriate parameter identification (PID) or measured signal related to the fault area. Select a symptom from the symptom chart along with the category number and go to the PID/Measured Signal Chart. For multiple symptoms, select the symptom that is most evident.

Symptom Chart

SYMPTOM CHART

Typical Diagnostic Reference Values

Note. The footnotes are referenced throughout the Typical Diagnostic Reference Value Charts. A letter in parentheses next to a value indicates supplemental information is applicable.

The Typical Diagnostic Reference Value Charts do not display fault parameter identifications (PIDs). These are PIDs which indicate a hard fault with the circuit. They display a value of YES or NO and are PIDs ending with an F.

The Typical Diagnostic Reference Value Charts do not display limited operating strategy (LOS) PIDs. These are PIDs which indicate what LOS mode that vehicle is in. They display a value of YES or NO.

Reference values may vary 20%, depending on operating conditions and other factors. RPM values are axle and tire dependent.

For the downstream heated exhaust gas oxygen (HO2S12) sensor, greater activity results when the catalyst monitor is active.

Refer to ACRONYMS AND DEFINITIONS for technical terms applicable to Ford Motor Company products.

Refer to PARAMETER IDENTIFICATION (PID) , for PID descriptions.

1. A/C on.
2. Cooling fan on (single, low or high speed).
3. The heated exhaust gas oxygen sensors (HO2S) should switch from rich to lean at least once every 3 seconds. The HO2S voltage should toggle above and below 0.450 DCV and never be a negative value. Valid HO2S switching only occurs during closed loop fuel control.
4. The downstream HO2S stays close to a constant voltage when the catalyst monitor is off (positive value only). When the catalyst monitor is on, HO2S switches rich to lean above and below 0.450 DCV and never be a negative value.
5. Brake pedal applied.
6. Ignition key in START position.
7. Value is dependent upon ambient air temperature and may fall outside of range.
8. Gear selector in PARK position.
9. Traction battery power off requested.
10. Transaxle control module (TCM) requesting powertrain malfunction indicator (wrench) on.
11. TCM requesting hazard indicator on.
12. Powertrain control module (PCM) requesting generator motor shutdown.
13. PCM requesting traction motor shutdown.
14. Engine must be running or cranking.
15. Heater on.
16. Engine speed between 900 and 1,200 RPM.
17. Gear selector in DRIVE position.

Scheme 172

PCM SENSORS /INPUTS

PCM ACTUATORS /OUTPUTS

OTHER

Scheme 173

Scheme 174

TCM INPUTS

TCM OUTPUTS

OTHER

TBCM OUTPUTS