PCM INSPECTION [MZ-CD 1.6 (Y6)]

id0140b2802500

Not Using the M-MDS

Примечание

•  The PCM terminal voltage can vary with conditions when measuring and changes due to age deterioration on the vehicle, causing false diagnosis. Therefore a comprehensive inspection of the input and output systems, and the PCM is necessary to determine where the malfunction occurs.

PCM terminal voltage table (Reference)

Terminal	Signal name	Connected to	Measurement condition		Voltage (V)	Inspection item(s)
101	Fuel injector No.1 control signal ”high”	Fuel injector No.1	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.1 •  Related wiring harness
102	Fuel injector No.4 control signal ”high”	Fuel injector No.4	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.4 •  Related wiring harness
103	Fuel temperature sensor ground	Fuel temperature sensor	Under any condition		1.0 or less	•  Fuel temperature sensor •  Related wiring harness
104	Variable boost control signal	Variable boost control solenoid valve	(See Inspection Using An Oscilloscope (Reference).)			•  Variable boost control solenoid valve •  Related wiring harness
105	Sensor ground	Air bypass valve position sensor*2, intake throttle valve position sensor	Under any condition		1.0 or less	•  Related wiring harness
106	—	—	—		—	—
107	Generator command	Generator	(See Inspection Using An Oscilloscope (Reference).)			•  Generator •  Related wiring harness
108	Starter control signal	Starter relay	Under any condition		1.0 or less	•  Starter relay •  Related wiring harness
109	Fuel injector No.3 control signal ”high”	Fuel injector No.3	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.3 •  Related wiring harness
110	Fuel injector No.2 control signal ”high”	Fuel injector No.2	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.2 •  Related wiring harness
111	—	—	—		—	—
112	A/C control signal	A/C relay	Under any condition		1.0 or less	•  A/C relay •  Related wiring harness
113	—	—	—		—	—
114*2	—	—	—		—	—
114*1	Catalyst exhaust gas temperature sensor ground	Catalyst exhaust gas temperature sensor	Under any condition		1.0 or less	•  Catalyst exhaust gas temperature sensor •  Related wiring harness
115	—	—	—		—	—
116	—	—	—		—	—
117	Fuel injector No.4 control signal ”low”	Fuel injector No.4	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.4 •  Related wiring harness
118	Fuel injector No.1 control signal ”low”	Fuel injector No.1	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.1 •  Related wiring harness
119*2	—	—	—		—	—
119*1	Diesel particulate filter differential pressure sensor ground	Diesel particulate filter differential pressure sensor	Under any condition		1.0 or less	•  Diesel particulate filter differential pressure sensor •  Related wiring harness
120	—	—	—		—	—
121	EGR valve position sensor ground	EGR valve position sensor	Under any condition		1.0 or less	•  EGR valve position sensor •  Related wiring harness
122	—	—	—		—	—
123	—	—	—		—	—
124	MAF sensor signal	MAF sensor	KOEO		Approx. 8.2	•  MAF sensor •  Related wiring harness
			KOER	Idle	Approx. 10
				2,000 rpm	Approx. 11.5
125	Fuel injector No.3 control signal ”low”	Fuel injector No.3	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.3 •  Related wiring harness
126	Fuel injector No.2 control signal ”low”	Fuel injector No.2	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel injector No.2 •  Related wiring harness
127	—	—	—		—	—
128	—	—	—		—	—
129	EGR valve position sensor signal	EGR valve position sensor	KOEO		Approx. 0.86	•  EGR valve •  Related wiring harness
			KOER	Idle	Approx. 2.8
				2,000 rpm
130	—	—	—		—	—
131	—	—	—		—	—
132	Glow time feed back input signal state	Glow plug relay	KOEO		Approx. 11	•  Glow plug relay •  Related wiring harness
			KOER	Idle	1.0 or less
				2,000 rpm
201	EGR valve position sensor supply	EGR valve position sensor	KOEO/KOER		Approx. 5	•  EGR valve •  Related wiring harness
202	Fuel pressure sensor supply	Fuel pressure sensor	KOEO/KOER		Approx. 5	•  Fuel pressure sensor •  Related wiring harness
203	Fuel pressure sensor ground	Fuel pressure sensor	Under any condition		1.0 or less	•  Fuel pressure sensor •  Related wiring harness
204	MAP sensor ground	MAP sensor	Under any condition		1.0 or less	•  MAP sensor •  Related wiring harness
205	MAP sensor supply	MAP sensor	KOEO/KOER		Approx. 5	•  MAP sensor •  Related wiring harness
206	Constant voltage (Vref)	CMP sensor, intake throttle valve position sensor, air bypass valve position sensor*2	KOEO/KOER		Approx. 5	•  Related wiring harness
207*2	—	—	—		—	—
207*1	Diesel particulate filter differential pressure sensor supply	Diesel particulate filter differential pressure sensor	KOEO/KOER		Approx. 5	•  Diesel particulate filter differential pressure sensor •  Related wiring harness
208	—	—	—		—	—
209	—	—	—		—	—
210	Glow plug control signal	Glow plug relay	Engine switch off		B+	•  Glow plug relay •  Related wiring harness
			KOEO		Approx. 9.7
			KOER	Idle	Approx. 10.7
				2,000 rpm
211	IAT sensor No.2 ground	IAT sensor No.2	Under any condition		1.0 or less	•  IAT sensor No.2 •  Related wiring harness
212	Fuel metering valve control signal	Fuel metering valve	(See Inspection Using An Oscilloscope (Reference).)			•  Fuel metering valve •  Related wiring harness
213	Generator state signal	Generator	KOEO		1.0 or less	•  Generator •  Related wiring harness
			KOER	Idle	Approx. 2.6
				2,000 rpm	Approx. 1.2
214	—	—	—		—	—
215	—	—	—		—	—
216	—	—	—		—	—
217	—	—	—		—	—
218	CKP sensor supply	CKP sensor	KOEO/KOER		Approx. 5	•  CKP sensor •  Related wiring harness
219	Fuel pressure sensor signal	Fuel pressure sensor	KOEO		Approx. 0.5	•  Fuel pressure sensor •  Related wiring harness
			KOER	Idle	Approx. 1.0
				2,000 rpm	Approx. 1.6
220*2	—	—	—		—	—
220*1	Catalyst exhaust gas temperature sensor signal	Catalyst exhaust gas temperature sensor	Exhaust gas temperature:100°C {212 °F}		Approx. 4.83	•  Catalyst exhaust gas temperature sensor •  Related wiring harness
			Exhaust gas temperature:150°C {302 °F}		Approx. 4.51
			Exhaust gas temperature:200°C {392 °F}		Approx. 3.98
			Exhaust gas temperature:250°C {482 °F}		Approx. 3.22
			Exhaust gas temperature:300°C {572°F}		Approx. 2.43
			Exhaust gas temperature:350°C {662 °F}		Approx. 1.74
			Exhaust gas temperature:400°C {752 °F}		Approx. 1.24
			Exhaust gas temperature:450°C {842 °F}		Approx. 0.89
			Exhaust gas temperature:500°C {932 °F}		Approx. 0.64
			Exhaust gas temperature:550°C {1,022 °F}		Approx. 0.47
			Exhaust gas temperature:600°C {1,112 °F}		Approx. 0.36
			Exhaust gas temperature:650°C {1,202 °F}		Approx. 0.27
			Exhaust gas temperature:700°C {1,292 °F}		Approx. 0.21
221	—	—	—		—	—
222	Intake throttle valve position sensor signal	Intake throttle valve position sensor	—		—	•  Intake throttle valve •  Related wiring harness
223	—	—	—		—	—
224	—	—	—		—	—
225	—	—	—		—	—
226	—	—	—		—	—
227	EGR valve servo motor control signal (plus)	EGR valve servo motor	(See Inspection Using An Oscilloscope (Reference).)			•  EGR valve •  Related wiring harness
228	EGR valve servo motor control signal (minus)	EGR valve servo motor	Under any condition		1.0 or less	•  EGR valve •  Related wiring harness
229	MAF/IAT sensor ground	MAF/IAT sensor	Under any condition		1.0 or less	•  MAF/IAT sensor •  Related wiring harness
230	ECT sensor signal	ECT sensor	Engine coolant temperature:30°C {86°F}		Approx. 2.6	•  ECT sensor •  Related wiring harness
			Engine coolant temperature:70°C {158°F}		Approx. 1.1
231	IAT sensor signal	IAT sensor	Intake air temperature:29°C {84.2°F}		Approx. 2.2	•  IAT sensor •  Related wiring harness
			Intake air temperature:33°C {91.4°F}		Approx. 1.8
232	Fuel temperature sensor signal	Fuel temperature sensor	Fuel temperature:43°C {109.4°F}		Approx. 1.49	•  Fuel temperature sensor •  Related wiring harness
			Fuel temperature:47°C {116.6°F}		Approx. 1.37
233*2	—	—	—		—	—
233*1	Air bypass valve position sensor signal	Air bypass valve position sensor	—		—	•  Air bypass valve •  Related wiring harness
234	MAP sensor signal	MAP sensor	KOEO		Approx. 2.4	•  MAP sensor •  Related wiring harness
			KOER	MAP: 103 kPa {773 mmHg, 30 inHg}	Approx. 2.43
				MAP: 150 kPa {1125 mmHg, 44 inHg}	Approx. 3.3
235	—	—	—		—	—
236	Power supply	PCM control relay	KOEO/KOER		B+	•  PCM control relay •  Related wiring harness
237	CMP sensor ground	CMP sensor	Under any condition		1.0 or less	•  CMP sensor •  Related wiring harness
238	CKP sensor signal	CKP sensor	(See Inspection Using An Oscilloscope (Reference).)			•  CKP sensor •  Related wiring harness
239	CKP sensor ground	CKP sensor	Under any condition		1.0 or less	•  CKP sensor •  Related wiring harness
240	CMP sensor signal	CMP sensor	(See Inspection Using An Oscilloscope (Reference).)			•  CMP sensor •  Related wiring harness
241	Power supply	PCM control relay	Engine switch is off		B+	•  PCM control relay •  Related wiring harness
			KOEO		1.0 or less
			KOER	Idle
				2,000 rpm
242	IAT sensor No.2 signal	IAT sensor No.2	—		—	•  IAT sensor No.2 •  Related wiring harness
243	—	—	—		—	—
244	ECT sensor ground	ECT sensor	Under any condition		1.0 or less	•  ECT sensor •  Related wiring harness
245	—	—	—		—	—
246	Diesel particulate filter differential pressure sensor signal	Diesel particulate filter differential pressure sensor	Diesel particulate filter differential pressure:0 kPa {0 kgf/cm2, 0 psi}		Approx. 0.50	•  Diesel particulate filter differential pressure sensor •  Related wiring harness
			Diesel particulate filter differential pressure:5 kPa {0.051 kgf/cm2, 0.73 psi}		Approx. 0.77
			Diesel particulate filter differential pressure:10 kPa {0.102 kgf/cm2, 1.45 psi}		Approx. 1.03
			Diesel particulate filter differential pressure:15 kPa {0.153 kgf/cm2, 2.18 psi}		Approx. 1.30
			Diesel particulate filter differential pressure:20 kPa {0.204 kgf/cm2, 2.90 psi}		Approx. 1.57
			Diesel particulate filter differential pressure:25 kPa {0.255 kgf/cm2, 3.63 psi}		Approx. 1.83
			Diesel particulate filter differential pressure:30 kPa {0.306 kgf/cm2, 4.35 psi}		Approx. 2.10
			Diesel particulate filter differential pressure:35 kPa {0.357 kgf/cm2, 5.08 psi}		Approx. 2.37
			Diesel particulate filter differential pressure:40 kPa {0.408 kgf/cm2, 5.80 psi}		Approx. 2.63
			Diesel particulate filter differential pressure:45 kPa {0.459 kgf/cm2, 6.53 psi}		Approx. 2.90
			Diesel particulate filter differential pressure:50 kPa {0.510 kgf/cm2, 7.25 psi}		Approx. 3.17
			Diesel particulate filter differential pressure:55 kPa {0.561 kgf/cm2, 7.98 psi}		Approx. 3.43
			Diesel particulate filter differential pressure:60 kPa {0.612 kgf/cm2, 8.70 psi}		Approx. 3.70
			Diesel particulate filter differential pressure:65 kPa {0.663 kgf/cm2, 9.43 psi}		Approx. 3.97
			Diesel particulate filter differential pressure:70 kPa {0.714 kgf/cm2, 10.2 psi}		Approx. 4.23
			Diesel particulate filter differential pressure:75 kPa {0.765 kgf/cm2, 10.9 psi}		Approx. 4.50
247	Intake throttle valve actuator control signal	Intke throttle valve actuator	—		—	•  Intake throttle valve •  Related wiring harness
248*2	—	—	—		—	—
248*1	Air bypass valve actuator control signal	Air bypass valve actuator	—		—	•  Air bypass valve •  Related wiring harness
301	Controller area network (high)	Controller area network (high)	Because this terminal is for CAN, determination by terminal voltage is not possible.			•  Related wiring harness
302	K-line	DLC-2	Because this terminal is for K-line, determination by terminal voltage is not possible.			•  Related wiring harness
303	Fan state signal	A/C switch	Under any condition		1.0 or less	•  A/C switch •  Related wiring harness
304	—	—	—		—	—
305	—	—	—		—	—
306	—	—	—		—	—
307	Ground	Body ground	Under any condition		1.0 or less	•  Related wiring harness
308	Ground	Body ground	Under any condition		1.0 or less	•  Related wiring harness
309	Controller area network (low)	Controller area network (low)	Because this terminal is for CAN, determination by terminal voltage is not possible.			•  Related wiring harness
310	APP state signal	APP sensor	APP is fully opened		1.0 or less	•  APP sensor •  Related wiring harness
			APP is fully closed		Approx. 7.2
311	IG1 signal	engine switch	KOEO/KOER		B+	•  engine switch •  Related wiring harness
312	—	—	—		—	—
313	Oil pressure signal	Oil pressure switch	KOEO		1.0 or less	•  Oil pressure switch •  Related wiring harness
			KOER		B+
314	—	—	—		—	—
315	A/C compressor pressure signal	Refrigerant pressure sensor	Under any condition		1.0 or less	•  Refrigerant pressure sensor •  Related wiring harness
316	—	—	—		—	—
317	Brake state signal	Brake switch	KOEO/KOER	Brake pedal depressed	B+	•  Brake switch •  Related wiring harness
				Brake pedal released	1.0 or less
318	Fan control unit	Fan control unit	KOEO/KOER	The A/C is operating	Approx. 5	•  Fan control unit •  Related wiring harness
				The A/C is not operating	B+
319	—	—	—		—	—
320	—	—	—		—	—
321	—	—	—		—	—
322	—	—	—		—	—
323	—	—	—		—	—
324	—	—	—		—	—
326	—	—	—		—	—
327	—	—	—		—	—
328	—	—	—		—	—
329	—	—	—		—	—
330	—	—	—		—	—
331	Power supply	PCM control relay	KOEO/KOER		B+	•  PCM control relay •  Related wiring harness
332	Ground	Body ground	Under any condition		1.0 or less	•  Related wiring harness

Inspection Using An Oscilloscope (Reference)

Fuel inject control signal (high)

am3zzw00001035

PCM terminals

•  No. 1: 101 (+)—Body ground (–)

•  No. 2: 110 (+)—Body ground (–)

•  No. 3: 109 (+)—Body ground (–)

•  No. 4: 102 (+)—Body ground (–)

Oscilloscope setting

•  5 V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Variable boost control signal

am3zzw00001036

PCM terminals

•  104 (+)—Body ground (–)

Oscilloscope setting

•  2.5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Generator command

am3zzw00001037

PCM terminals

•  107 (+)—Body ground (–)

Oscilloscope setting

•  5 mV/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Fuel inject control signal (low)

am3zzw00001038

PCM terminals

•  No. 1: 118 (+)—Body ground (–)

•  No. 2: 126 (+)—Body ground (–)

•  No. 3: 125 (+)—Body ground (–)

•  No. 4: 117 (+)—Body ground (–)

Oscilloscope setting

•  5 V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Fuel metering valve control signal

am3zzw00001039

PCM terminals

•  212 (+)—Body ground (–)

Oscilloscope setting

•  2 V/DIV (Y), 2 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

EGR valve actuator control signal

am3zzw00001040

PCM terminals

•  227 (+)—Body ground (–)

Oscilloscope setting

•  2.5 V/DIV (Y), 200 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

CKP sensor signal

am3zzw00001041

PCM terminals

•  238 (+)—Body ground (–)

Oscilloscope setting

•  1 V/DIV (Y), 400 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

CMP sensor signal

am3zzw00001042

PCM terminals

•  240 (+)—Body ground (–)

Oscilloscope setting

•  1.5 V/DIV (Y), 10 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Using the M-MDS (reference)

―  CMP sensor (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZ-CD 1.6 (Y6)].)

―  Main relay (See ПРОВЕРКА РЕЛЕ.)

Примечание

•  The PID/DATA MONITOR function monitors the calculated value of the input/output signals in the PCM. Therefore, an output device malfunction is not directly indicated as a malfunction of the monitored value for the output device. If a monitored value of an output device is out of specification, inspect the monitored value of the input device related to the output control.

•  The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows.

―  ALTF, CABVP, EGR_TV, EGRDC, FUN_DUTY, FP, GPC, ST_EN_RLY, VBCV

PID monitor table