Engine Controls - Reference Values (Except Diesel & Hybrid) (Section 6): Diagnosis

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 the most evident.

Symptom Chart

Symptom Occurs During	Symptom	Category Number
Startup	No start/Normal crank	1
	Hard start/Long crank	2
	Stall after start	3
	Diesels/Runs on	4
Idle	MIL	4	5
	Stalls/Quits	6
	Slow	7
	Slow return	8
	Rolling	9
	Fast	10
	Rough	11
	Misses	12
	Backfires	13
Acceleration	Stalls/Quits	13	6
	Misses	12
	Bucks/Jerks	14
	Backfires	13
	Hesitation	15
	Lack/Loss of power	16
	Surge	17
	Spark knock	18
	Cooling system temperature	19
	Poor fuel economy	20
	Emissions compliance	21
Cruise	Stalls/Quits	21	6
	Misses	12
	Bucks/Jerks	14
	Backfires	13
	Lack/Loss of power	16
	Surge	17
	Spark knock	18
	Cooling system temperature	19
	Poor fuel economy	20
	Emissions compliance	21
Deceleration	Stalls/Quits	21	6
	Backfires	13
Transmission Operation: (Automatic)	Shift/engagement concerns	13	22
	No overdrive	23

Typical Diagnostic Reference Values

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

An attempt is made to provide as much information as possible; some vehicles may not display all input and output signals.

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 FAULT or NO FAULT and are PIDs ending with the letter F.

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

Values are taken at an altitude of approximately 189 meters (620 ft) above sea level with the engine at normal operating temperature and accessories off.

Refer to the INTRODUCTION -- ESCAPE article, Acronyms and Definitions for technical terms applicable to Ford Motor Company products.

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

For detailed transmission diagnostics, refer to the appropriate Service Information . Transmission signals may be referred to in either alpha or numeric form. For example, 1=A, 2=B, 3=C.

A/C on.
Cooling fan on (single, low or high speed).
Heated oxygen sensors (HO2S) should switch from rich to lean at least once every 3 seconds. HO2S voltage should toggle above and below 0.450 DCV and never be a negative value. Valid HO2S switching occurs only during closed loop fuel control operation.
Downstream oxygen sensors stay close to a constant voltage when the catalyst monitor is off (positive value only). When the catalyst monitor is on, the HO2S switches from rich to lean above and below 0.450 DCV and should never be a negative value. For downstream oxygen sensors (12, 22) greater activity results when the catalyst monitor is active.
Brake pedal applied.
The electric vapor management valve (VMV) commanded current varies from 0 mA - 1000 mA depending on the powertrain control module (PCM) command to purge the evaporative emission (EVAP) system.
While pressing the transmission control switch (TCS) or switching to manual drive mode.
Value depends on fuel tank level. Typical operating range is 15% (empty) to 90% (full).
Value is not useful under this condition.
The normal operation value is from -1.5 to 3.5 degrees.

Scheme 112

Scheme 112: 1.6L 4V Fiesta

Sensors/Inputs	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Sensors/Inputs	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
BOO1	B2	OFF	ON (E)	OFF	OFF	ON/OFF
FPM	B4	59.21	59.21	59.21	59.21	%
CPP_BOT	B7	NO	NO	NO	NO	YES/NO
ACP_V	B28	1.30	1.12	1.18	1.18	VOLTS
BOO2	B29	OFF	ON (E)	OFF	OFF	ON/OFF
ECT	E15	1.00/55 (131)	0.45/85 (185)	0.44/86 (186.8)	0.43/87 (188.6)	VOLTS/DEG C (DEG F)
O2S12	E20	(I)	(D)	(D)	(D)	VOLTS
O2S11	E21	(I)	Switching (C)	Switching (C)	Switching (C)	VOLTS
IAT	E26	0.45/40 (104)	0.96/18 (64.4)	0.98/17 (62.6)	1.02/16 (60.8)	VOLTS/DEG C (DEG F)
MAF	E37	0.01	0.59	1.34	1.86	VOLTS
APP1 [APP_D]	E44	1.96	1.96	1.96	1.96	%
ACP_PRESS	PID	100.34/691.81	77.43/533.86	84.53/582.81	84.53/582.81	PSI/kPa
APP	PID	0	0	0	0	%
APP2 [APP_E]	PID	8.06	8.23	8.23	8.23	%
BARO	PID	14.35/156.11/99.00	14.35/156.11/99.00	14.35/156.11/99.00	14.35/156.11/99.00	PSI/Hz/kPa
B+	PID	12.7	13-14	13-14	13-14	VOLTS
CPP	PID	NO	NO	NO	NO	YES/NO
EVAP_ACTIVE	PID	OFF	OFF	OFF	OFF	ON/OFF
EVAP_EVAL	PID	NO	NO	NO	NO	YES/NO
EVAP_SWITCH	PID	OPEN	OPEN	OPEN	OPEN	OPEN/CLOSED
FLI	PID	70.19	57.25	66.66	67.84	%
FTP_INF	PID	0	0.09/-0.62	0.11/-0.75	0.18/-1.24	PSI/kPa
LOAD	PID	0 (I)	24.70	35.68	62.35	%
MP_LRN	PID	YES	YES	YES	YES	YES/NO
OUTDR_TMP	PID	23 (73.4)	13 (55.4)	14 (57.2)	14 (57.2)	DEG C (DEG F)
O2SHTR_EVAL	PID	YES	YES	YES	YES	YES/NO
O2S_EVAL	PID	YES	YES	YES	YES	YES/NO
RPM	PID	0	755	1809	3334	RPM
SYNC	PID	NO	YES	YES	YES	YES/NO
THROTTLE_CMD	PID	5.49	0.78	1.96	5.88	%
TP REL	PID	5.09	0.39	1.56	5.88	VOLTS
TP1_ADP_CLSD	PID	0.49	0.49	0.49	0.49	VOLTS
TP1_ADP_LIMP	PID	0.81	0.81	0.81	0.81	VOLTS
TP1_ADP_MINAIR	PID	0.49	0.49	0.49	0.49	VOLTS
TP2_ADP_CLSD	PID	4.49	4.49	4.49	4.49	VOLTS
TP2_ADP_LIMP	PID	4.18	4.18	4.18	4.18	VOLTS
TPMODE	PID	CT	CT	PT	PT	CLOSED/PART/WIDE OPEN THROTTLE
VCT_EXH_DIF1	PID	0	0	0	2.25	%
VCT_INT_ACT1	PID	139.87	139.87	139.87	136.12	DEG
VCT_INT_DIF1	PID	0	0	0	2.62	DEG
VSS	PID	0	0	48 km/h (30 MPH)	89 km/h (55 MPH)	Km/h / MPH

SENSORS/INPUTS - 1.6L 4V FIESTA

Actuators/Outputs	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Actuators/Outputs	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
EVAPCP	E23	0	17.25	33.72	67.05	%
HTR12	E35	OFF	ON	ON	ON	ON/OFF
LFC	B13	OFF	OFF	OFF	OFF	ON/OFF
HTR11	E47	OFF	ON	ON	ON	ON/OFF
FUELPW_CYL1-4	PID	10.74	2.96	2.23	2.23	MILLISECOND
FUELSYS	PID	OPEN LOOP	CLOSED LOOP	CLOSED LOOP	CLOSED LOOP	OPEN/CLOSED LOOP
HFC	PID	OFF	OFF	OFF	OFF	ON/OFF
LONGFT1	PID	(I)	20 TO +20	20 TO +20	20 TO +20	%
MAP_DMD	PID	14.49/99.9	4.78/32.95	6.99/48.19	11.33/78.11	PSI/kPa
PATSENABL	PID	ENABLED	ENABLED	ENABLED	ENABLED	ENABLED/DISABLED
SHRTFT1	PID	(I)	10 TO +10	10 TO +10	10 TO +10	%
SPARKADV	PID	24	6.5	1.5	12	DEG
VCT_EXH_ACT1	PID	120.75	121.12	121.12	79.50	DEG
VCT_EXH_DC1	PID	12.50	11.32	11.32	40.03	%
VCT_EXH_DSD1	PID	0.37	0	0	42.37	DEG
VCT_INT_DC1	PID	12.50	11.32	11.32	43.66	%
VCT_INT_DSD1	PID	0	0	0	1.87	DEG

ACTUATORS/OUTPUTS - 1.6L 4V FIESTA

Other	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Other	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
VPWR	B8/11/12	12.52	13-14	13-14	13-14	VOLTS
VREF	B16, T27, T29	5	5	5	5	VOLTS

OTHER - 1.6L 4V FIESTA

Scheme 113

Scheme 113: 2.0L 4V Focus

Sensors/Inputs	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Sensors/Inputs	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
FPM	B12	100	100	100	100	%
BOO2	B16	OFF	ON (E)	OFF	OFF	ON/OFF
HTRCM12	B20	0	0	0	0	Amps
APP2	B26	0.38/7.45	0.38/7.45	0.55/16.86	0.71/12.94	VOLTS/%
BOO1	B30	OFF	ON (E)	OFF	OFF	ON/OFF
ACP_PRESS	B31	693.81 (100.63)	673.82 (97.73)	577.84 (83.81)	527.86 (76.56)	KPa (PSI)
ACP_V	B31	1.21	1.19	1.07	1.02	VOLTS
AAT	B35	13 (55.4)	12 (53.6)	14 (57.2)	13 (55.4)	DEG C (DEG F)
AAT_V	B35	1.47	1.50	1.45	1.48	VOLTS
O2S12	B48	0.46 (I)	0.71 (D)	0.59 (D)	0.53 (D)	VOLTS
APP1	B52	0.76/14.9	0.76/14.9	1.08/21.56	1.42/28.23	VOLTS/%
FTP	B59	0.62/527.86 (110.2)	2.48/-0.20 (-0.03)	2.65/0 (0.00)	2.33/-0.48 (-0.07)	VOLTS/kPa (PSI)
FLP	E7	516.34 (74.89)	425.88 (61.77)	416.85 (60.46)	452.36 (65.61)	KPa (PSI)
IAT	E10	1.97/33 (91.4)	2.35/25 (77)	2.90/14 (57.2)	2.90/14 (57.2)	VOLTS/DEG C (DEG F)
ECT	E12	108 (226.4)	101 (213.8)	92 (197.6)	94 (201.2)	DEG C (DEG F)
FRP	E40	0.62/759.8 (110.20)	0.82/1929.4 (279.85)	1.67/6868.2 (996.15)	1.87/8067.9 (1170.15)	VOLTS/kPa (PSI)
MAF	E55	0	1.66	7.42	9.97	VOLTS
MAF_HZ	E55	0.68	1.57	3.03	3.43	KHz
VCT_INT_ACT1	E67	0	0.12	0.06	0.18	DEG
VCT_EXH_ACT1	E71	0	0	10	32.62	DEG
O2S11_CUR	E89	(I)	Switching	Switching	Switching	MA/uA
APP	PID	0	0	10	20.5	%
APP_MAXDIFF	PID	0	0.06	0	0	DEG
APP_MODE	PID	NO PEDAL	NO PEDAL	PART PEDAL	PART PEDAL	NO PEDAL/PART PEDAL
BARO	PID	3.93/98.93 (14.35)/156.11/397.44	3.92/98.93 (14.35)/156.11/397.44	3.93/98.93 (14.35)/156.11/397.44	3.92/98.93 (14.35)/156.11/397.44	VOLTS/kPa (PSI)/Hz/in-H 2 O
BRKOVR_ACTION	PID	0	0	0	0	NUMERIC VALUE
BRKOVRD_POSS	PID	30	30	30	30	NUMERIC VALUE
B+	PID	12.7	13-14	13-14	13-14	VOLTS
DECHOKE	PID	YES	NO	NO	NO	YES/NO
DIST_BRKOVERD	PID	154.4 (95.96)	135.9 (84.47)	111.9 (69.56)	113.4 (70.49)	Km (Miles)
DIST_TOT_VEH	PID	0 (0)	0 (0)	0 (0)	0 (0)	Km (Miles)
ETC_TRIM	PID	0.15 (J)	0.14 (J)	0.01 (J)	0.01 (J)	DEG
FLI	PID	100	100	100	100	%
FRP_DSD	PID	369.90 (53.65)	1989.48 (288.55)	7158.13 (1038.2)	8797.71 (1276)	KPa (PSI)
GEAR	PID	1	1	5	6	GEAR
LOAD	PID	0 (I)	26.27	68.62	83.13	%
MAP	PID	0	0	0	0	VOLTS
MISFIRE	PID	NO	NO	NO	NO	YES/NO
MP_LRN	PID	YES	YES	YES	YES	YES/NO
O2S11_IMPED	PID	4.93	1.00	1.01	1.00	VOLTS
O2_DS1_ERR	PID	0	0.04	0.03	0.15	VOLTS
RPM	PID	0	675.5	1601.2	2525.2	RPM
SYNC	PID	NO	YES	YES	YES	YES/NO
TP1_LRN_TRIM	PID	9.37	9.37	9.37	9.37	DEG
TP2_LRN_TRIM	PID	9.50	9.37	9.37	9.37	DEG
VSS	PID	0	0	48 km/h (30 MPH)	89 km/h (55 MPH)	Km/h / MPH

SENSORS/INPUTS - 2.0L 4V FOCUS

Actuators/Outputs	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Actuators/Outputs	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
HTR12	B20	OFF	ON	ON	ON	ON/OFF
EVAPCV	B44	0	0	0	0	%
FP	B45	1.99	34.75	34.90	36.20	%
FTP_H2O	B59	0.137	1.206	0.207	2.068	In-H 2 O
HTR11	E72	OFF	ON	ON	ON	ON/OFF
O2S11_HTR	E72	0	32.94	27.84	24.70	%
EVAPCP	E91	0	19.26	98.84	67.07	%
ETC [TAC_PCT]	PID	8.62	0.78	13.33	11.37	%
EVAPSOAK	PID	YES	YES	YES	YES	YES/NO
EVAP020C	PID	NO	NO	NO	NO	YES/NO
FANDC	PID	0	28.62	0	0	%
FAN_DSD	PID	0	28.63	0	0	%
FUELSYS	PID	OPEN LOOP	CLOSED LOOP	CLOSED LOOP	CLOSED LOOP	OPEN/CLOSED LOOP
F_VCV	PID	0	8.50	19.07	26.44	%-VARYING
GRILL_A_CMD	PID	0	50.98	0	0	%
GRILL_A_INF	PID	0	50.19	0	0	%
GRILL_CMDCAL	PID	NO	NO	NO	NO	YES/NO
LONGFT1	PID	(I)	20 TO +20	20 TO +20	20 TO +20	%
PATSENABL	PID	ENABLED	ENABLED	ENABLED	ENABLED	ENABLED/DISABLED
RO2FT1	PID	0	1.47	1.51	0.98	%
SHRTFT1	PID	(I)	10 TO +10	10 TO +10	10 TO +10	%
SPARKADV	PID	10	20	48	49.75	%
VCT_EXH_DC1	PID	0	0	43.28	43.93	%
VCT_EXH_DIF1	PID	0	0	0.68	0.31	DEG
VCT_EXH_DSD	PID	0	0	10.75	32.93	DEG
VCT_INT_DC1	PID	0	0	0	0	%
VCT_INT_DIF1	PID	0	0	0.31	0.12	DEG
VCT_INTK_DSD	PID	0	0	0	0	DEG

ACTUATORS/OUTPUTS - 2.0L 4V FOCUS

Other	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Other	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
VREF	B52/B66/E18/E63	5	5	5	5	VOLTS
VPWR	B5/B6	12.52	13-14	13-14	13-14	VOLTS

OTHER - 2.0L 4V FOCUS

Scheme 114

Scheme 114: 2.0L 4V Transit Connect

Sensors/Inputs	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Sensors/Inputs	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
BOO1	B13	OFF	ON (E)	OFF	OFF	ON/OFF
APP1	B28	0.87	0.83	1.56	2.03	VOLTS
APP2	B29	0.39	0.39	0.49	0.92	VOLTS
ACP_PRESS	B31	1.49/62.35	1.42/57.42	0.89/24.5	0.82/20.3	VOLTS/PSI
FPM	B32	0	100	100	100	%
MAF	B40	0	0.6	1.57	1.76	VOLTS
BOO2	B46	OFF	ON (E)	OFF	OFF	ON/OFF
IAT	B47	1.27/62 (143.6)	1.79/49 (120.2)	3.42/16 (60.8)	4.04/2 (35.6)	VOLTS/DEG C (DEG F)
FTP	B65	2.6/0	2.54/-0.01	2.54/-0.01	2.54/-0.01	VOLTS/PSI
O2S11	E11	(I)	Switching (C)	Switching (C)	Switching (C)	VOLTS
CHT	E15	3.27/105 (221)	3.51/97 (206.6)	3.9/84 (183.2)	3.78/88 (190.4)	VOLTS/DEG C (DEG F)
MAP	E40	4.02/98.93/14.35/29.2	1.25/30.95/4.49/9.2	2.52/61.98/8.99/17.8	2.32/51.98/7.54/15.4	VOLTS/kPa/PSI/inHg
HTRCM11	E52	0	1.65	1.65	1.48	AMPS
O2S12	T16	(I)	(D)	(D)	(D)	VOLTS
HTRCM12	T18	0	615	615	622	MA
TFT (A/T)	T19	43 (109.4)	45 (113)	45 (113)	44 (111.2)	DEG C (DEG F)
TFTV (A/T)	T19	2.08	1.99	1.99	2.05	VOLTS
PSP	T29	OFF	OFF	OFF	OFF	ON/OFF
TCC (A/T)	T30	0	0	0	99.61	%
TSS_SRC (A/T)	T37	0	690	1025	1840	RPM
APP	PID	0	0	18	23.5	%
APP_MAXDIFF	PID	0	0	0	0.06	DEG
BARO	PID	14.35/155.2	14.35/155.2	14.35/155.2	14.35/155.2	PSI/Hz
B+	PID	12.7	13-14	13-14	13-14	VOLTS
CPP/PNP	PID	NEUTRAL	NEUTRAL	DRIVE	DRIVE	MODE
DECHOKE	PID	YES	NO	NO	NO	YES/NO
ETC_TRIM	PID	0.35 (J)	0.35 (J)	0.3 (J)	0.36 (J)	DEG
GEAR	PID	3	3	4	4	GEAR
GENMON	PID	0	25.2	29.88	23.62	%
LOAD	PID	0 (I)	27.45	29.41	44.31	%
MISFIRE	PID	NO	NO	NO	NO	YES/NO
MP_LRN	PID	NO	NO	NO	NO	YES/NO
O2BANK1	PID	VARIES	VARIES	VARIES	VARIES	RICH/LEAN
RPM	PID	0	698.3	1918	1807	RPM
SYNC	PID	NO	YES	YES	YES	YES/NO
TR (A/T)	PID	PARK	PARK	OVERDRIVE	OVERDRIVE	MODE
VSS	PID	0	0	48 km/h (30 MPH)	89 km/h (55 MPH)	Km/h / MPH

SENSORS/INPUTS - 2.0L 4V TRANSIT CONNECT

Actuators/Outputs	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Actuators/Outputs	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
FP	B19	OFF	ON	ON	ON	ON/OFF
EVAPCV	B20	0/OFF	0/OFF	0/OFF	0/OFF	%/ON/OFF
EVMV	B55	0/OFF	633/VARYING	500-900 (F)/OFF	500-900 (F)/OFF	MA/OFF- VARYING
HTR11	E52	OFF	ON	ON	ON	ON/OFF
SSA (SS1) (A/T)	T11	OFF	ON	ON	ON	ON/OFF
HTR12	T18	OFF	ON	ON	ON	ON/OFF
SSB (SS2) (A/T)	T23	OFF	OFF	OFF	ON	ON/OFF
EGRPCT	PID	0	0.78	54.51	40	%
EGR_STEP	PID	0	1	29	21	POSITION
EVAP020C	PID	NO	NO	NO	NO	YES/NO
EVAPSOAK	PID	NO	YES	YES	YES	YES/NO
FUELSYS	PID	OPEN LOOP	CLOSED LOOP	CLOSED LOOP	CLOSED LOOP	OPEN/CLOSED LOOP
HFC	PID	OFF	ON (B)	OFF	OFF	ON/OFF
LFC	PID	OFF	ON (B)	OFF	OFF	ON/OFF
LONGFT1	PID	(I)	20 TO +20	20 TO +20	20 TO +20	%
PATSENABL	PID	ENABLED	ENABLED	ENABLED	ENABLED	ENABLED/DISABLED
SHRTFT1	PID	(I)	10 TO +10	10 TO +10	10 TO +10	%
SPARKADV	PID	10	10.25	39	27.25	DEG

ACTUATORS/OUTPUTS - 2.0L 4V TRANSIT CONNECT

Other	PCM Pin/PID only	Measured/PID Values				Units Measured/PID
Other	PCM Pin/PID only	KOEO	Hot Idle	48 KM/H (30 MPH)	89 KM/H (55 MPH)	Units Measured/PID
VREF	B52, E63, T10	5	5	5	5	VOLTS
VPWR	B67/68	12.52	13-14	13-14	13-14	VOLTS

OTHER - 2.0L 4V TRANSIT CONNECT

Engine Controls - Reference Values (Except Diesel & Hybrid) (Section 6): Diagnosis Ford Explorer V

Reference Value Symptom Chart

Symptom Chart

Typical Diagnostic Reference Values

Scheme 112

Scheme 113

Scheme 114

More articles — Engine Controls - Reference Values (Except Diesel & Hybrid) (Section 6)

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