PCM INSPECTION [YF (2.0L Zetec)]


id0140d4802500

Note
• The PCM terminal voltage can vary with the conditions when measuring, and deterioration over time on the vehicle, causing false diagnosis. Therefore a comprehensive determination of where malfunctions are occurring is required for input/output system, or PCM.

1. Disconnect the negative battery cable.

2. Remove the PCM.

3. Connect the powertrain control module (PCM) electrical connector.

4. Connect the negative battery cable.

5. Connect the negative (-) lead of the circuit tester to the body ground.

6. Measure the voltage at each PCM terminal using the (digital) circuit tester.

• If the output voltage is unusual despite normal input voltage, inspect the related systems. If they are normal, replace the PCM.

Terminal Voltage Table (Reference)

Terminal

Signal name

Connected to

Measurement condition

Value (Approx.)

Inspection item

1
-
-
-
-
-
2
-
-
-
-
-
3
-
-
-
-
-
4
-
-
-
-
-
5
-
-
-
-
-
6
-
-
-
-
-
7
-
-
-
-
-
8
-
-
-
-
-
9
-
-
-
-
-
10
-
-
-
-
-
11
-
-
-
-
-
12
-
-
-
-
-
13
FEPS
-
KOEO
0.5-0.6 (V)
• Related wiring harness
14
-
-
-
-
-
15
-
-
-
-
-
16
-
-
-
-
-
17
HFC
Fan control relay (high)
Cooling fan on
1.0 or less (V)
• Fan control relay (high)
• Related wiring harness
Cooling fan off
B+ (V)
18
-
-
-
-
-
19
PATSOUT
Immobilizer system (output)
KOEO
1.0 (V)
• Immobilizer system
• Related wiring harness
20
INJ3
Injector No.3
KOEO
0 (ms)
• Injector No.3
• Related wiring harness
Hot idle
2.5-3.0 (ms)
21
CKP (+)
CKP sensor
KOEO
0 (Hz)
• CKP sensor
• Related wiring harness
Hot idle
470-550 (Hz)
22
-
-
-
-
-
23
-
-
-
-
-
24
-
-
-
-
-
25
-
-
-
-
-
26
CDA
Ignition coil No.1, No.4
KOEO
B+ (V)
• Ignition coil No.1, No.4
• Related wiring harness
27
PATSTART
Starter relay
KOEO
1.0 or less (V)
• Starter relay
• Related wiring harness
28
VSO
-
Drive vehicle (48km/h {30mph})
65 (Hz)
• Related wiring harness
Drive vehicle (89km/h {55mph})
125 (Hz)
29
TCS
O/D OFF switch
While pressing the O/D OFF switch
B+ (V)
• O/D OFF switch
• Related wiring harness
Except above
1.0 or less (V)
30
-
-
-
-
-
31
PSP V/PSP
PSP switch
KOEO
1.0 or less (V)
• PSP switch
• Related wiring harness
Hot idle, Steering wheel turned.
B+ (V)
32
-
-
-
-
-
33
-
-
-
-
-
34
-
-
-
-
-
35
O2S12
HO2S
KOEO
1.0 or less (V)
• HO2S
• Related wiring harness
Hot idle
Downstream HO2S will stay close to a constant voltage when the catalyst monitor is off (positive value only). When the catalyst monitor is on, HO2S will switch rich to lean above and below 0.450 V and never be a negative.
36
-
-
-
-
-
37
TFT
TFT sensor
TFT 110-210°C{230-410°F}
0.5-2.0 (V)
• TFT sensor
• Related wiring harness
38
CHTV/CHT
Cylinder head temperature sensor
Cylinder head temperature 194°C{381°F}
0.67 or 3.7 (V)
• Cylinder head temperature sensor
• Related wiring harness
39
IAT
IAT sensor
IAT 50-120°C
{122-248°F}
1.7-3.5 (V)
• IAT sensor
• Related wiring harness
40
FPM
Fuel pump relay
KOEO
1.0 or less (V)
• Fuel pump relay
• Related wiring harness
Hot idle
B+ (V)
41
ACCS
A/C unit
KOEO
1.0 or less (V)
• A/C unit
• Related wiring harness
Hot idle, A/C on
B+ (V)
42
-
-
-
-
-
43
MFC
Fan control relay (medium)
KOEO
1.0 or less (V)
• Fan control relay (medium)
• Related wiring harness
Cooling fan on
B+ (V)
44
-
-
-
-
-
45
-
-
-
-
-
46
-
-
-
-
-
47
-
-
-
-
-
48
-
-
-
-
-
49
-
-
-
-
-
50
-
-
-
-
-
51
-
-
-
-
-
52
CDB
Ignition coil No.2, No.3
KOEO
B+ (V)
• Ignition coil No.2, No.3
• Related wiring harness
53
PATSIN
Immobilizer system
KOEO
B+ (V)
• Immobilizer system
• Related wiring harness
54
FP
Fuel pump relay
KOEO
B+ (V)
• Fuel pump relay
• Related wiring harness
Hot idle
1.0 or less (V)
55
-
-
-
-
-
56
EVAPPDC
Vapor magnet valve
KOEO
0 (Hz)
• Vapor magnet valve
• Related wiring harness
Hot idle
0-10 (Hz)
57
KS
KS
KOEO
1.0 or less (V)
• KS
• Related wiring harness
58
VSS
VSS
Drive vehicle (48km/h {30mph})
65 (Hz)
• VSS
• Related wiring harness
Drive vehicle (89km/h {55mph})
125 (Hz)
59
GLI
Generator
KOEO
10 (V)
• Generator
• Related wiring harness
60
O2S11
HO2S
KOEO
10 (V)
• HO2S
• Related wiring harness
KOER
HO2S should switch from rich to lean at least once every 3 s. HO2S voltage should toggle above and below 0.450 V and never be a negative value.Valid HO2S switching only occurs during closed loop fuel control.
61
-
-
-
-
-
62
FTP V/FTP
Fuel tank pressure sensor
KOEO
2.6 (V)
• Fuel tank pressure sensor
• Related wiring harness
63
-
-
-
-
-
64
TR V/TR
TR switch
P, N position
4.4 (V)
• TR switch
• Related wiring harness
D range
2.1 (V)
65
DPFEGR
D.P.F. EGR sensor
KOEO
0.95-1.05 (V)
• D.P.F. EGR sensor
• Related wiring harness
Drive vehicle
0.95-4.65 (V)
66
-
-
-
-
-
67
EVAPC V
Canister vent solenoid
KOEO
0 (Hz)
• Canister vent solenoid
• Related wiring harness
Hot idle
0-10 (Hz)
68
LFC
Fan control module (low)
Cooling fan off
B+ (V)
• Fan control module (low)
• Related wiring harness
Cooling fan on
1.0 or less (V)
69
WAC
A/C relay
A/C off
B+ (V)
• A/C relay
• Related wiring harness
A/C on
1.0 or less (V)
70
INJ1
Injector No.1
KOEO
0 (ms)
• Injector No.1
• Related wiring harness
Hot idle
2.5-3.0 (ms)
71
VPWR
Main relay, battery
KOEO
B+ (V)
• Main relay
• Battery
• Related wiring harness
72
-
-
-
-
-
73
-
-
-
-
-
74
-
-
-
-
-
75
-
-
-
-
-
76
-
-
-
-
-
77
-
-
-
-
-
78
-
-
-
-
-
79
EGRVR
EGR control valve
Duty ratio: 0%
B+ (V)
• EGR control valve
• Related wiring harness
Duty ratio: 36%
11.8 (V)
Duty ratio: 51%
11 (V)
80
-
-
-
-
-
81
EPC
-
KOEO
7.5 (V)
• Related wiring harness
Hot idle
8.4 (V)
82
-
-
-
-
-
83
IAC
IAC valve
Duty ratio: 0%
B+ (V)
• IAC valve
• Related wiring harness
Duty ratio: 26%
11.5 (V)
Duty ratio: 40-55%
7.5-10 (V)
Duty ratio: 40-60%
7-10 (V)
84
-
-
-
-
-
85
CID
CMP sensor
KOEO
0 (Hz)
• CMP sensor
• Related wiring harness
Hot idle
5-7 (Hz)
86
ACP V/ACP
Refrigerant pressure switch
Refrigerant pressure switch off
B+ (V)
• Refrigerant pressure switch
• Related wiring harness
Refrigerant pressure switch on
1.0 or less (V)
87
-
-
-
-
-
88
MAF V
MAF sensor
KOEO
0 (V)
• MAF sensor
• Related wiring harness
Hot idle
0.6-0.9 (V)
89
TP V
TP sensor
KOEO
0.53-1.27 (V)
• TP sensor
• Related wiring harness
Drive vehicle (48km/h {30mph})
1.0-1.3 (V)
Drive vehicle (89km/h {55mph})
1.3-2.0 (V)
90
VREF (Constant voltage power supply)
Fuel tank pressure sensor, TP sensor, D.P.F. EGR sensor
KOEO
5.0 (V)
• Fuel tank pressure sensor
• TP sensor
• D.P.F. EGR sensor
• Related wiring harness
91
-
-
-
-
-
92
BPP
Brake switch
When brake pedal is depressed
B+ (V)
• Brake switch
• Related wiring harness
When brake pedal is not depressed
1.0 or less (V)
93
HTR11
HO2S heater
Hot idle
0.1 (V)
• HO2S heater
• Related wiring harness
94
-
-
-
-
-
95
INJ4
Injector No.4
KOEO
0 (ms)
• Injector No.4
• Related wiring harness
Hot idle
2.5-3.0 (ms)
96
INJ2
Injector No.2
KOEO
0 (ms)
• Injector No.2
• Related wiring harness
Hot idle
2.5-3.0 (ms)
97
-
-
-
-
-
98
-
-
-
-
-
99
-
-
-
-
-
100
HTR12
HO2S heater
Hot idle
0.2 (V)
• HO2S heater
• Related wiring harness
101
-
-
-
-
-
102
-
-
-
-
-
103
-
-
-
-
-
104
-
-
-
-
-