|
|
4.Referring to the check sheet, insert the micromini probe into the check harness connector
and measure the voltage.
| note |
- You may find it convenient to pull out the engine-ECU to make it easier to reach
the connector terminals.
- The checks can be carried out off the order given in the chart.
|
| caution |
Short-circuiting the positive (+) probe between
a connector terminal and earth could damage the vehicle wiring, the sensor, engine-ECU or all
of them. Be careful to prevent this!
|
|
|
|
5.If voltmeter shows any division from standard value, check the corresponding sensor,
actuator and related electrical wiring, then repair or replace.
|
Terminal No.
|
Inspection Item
|
Check condition (Engine condition)
|
Normal condition
|
1
|
Oil feeder control valve
|
Engine: Idling operation after warm-up
|
System voltage
|
Engine: 5,000 r/min
|
1 V or less → 4.0 - 10 V*1(After a
few seconds pass)
|
2
|
No. 1 injector
|
Engine: While engine is idling after
having warmed up, suddenly depress the accelerator pedal.
|
From 9 - 14 V*1, it is
slightly reduced temporarily.
|
3
|
No. 2 injector
|
18
|
No. 3 injector
|
19
|
No. 4 injector
|
50
|
No. 5 injector
|
51
|
No. 6 injector
|
4
|
Ignition coil No. 1
|
Engine: 3,000 r/min
|
0.3 - 3.0 V*1
|
5
|
Ignition coil No. 2
|
20
|
Ignition coil No. 3
|
21
|
Ignition coil No. 4
|
52
|
Ignition coil No. 5
|
53
|
Ignition coil No. 6
|
6
|
Starter active signal
|
Engine: Cranking
|
System voltage
|
Engine: Idling
|
1.0 V or less
|
7
|
Engine oil pressure switch (for MIVEC)
|
Engine: Idling operation after warm-up
|
1.0 V or less
|
Engine: 5,000 r/min
|
System voltage
|
8
|
Crank angle sensor
|
Engine: Cranking
|
0.4 - 4.0 V*1
|
Engine: Idle operation
|
2.0 - 3.0 V*1
|
9
|
Sensor impressed voltage
|
Ignition switch: ON
|
4.9 - 5.1 V
|
10
|
Throttle position sensor (main)
|
- Remove the intake air hose at the throttle
body.
- Disconnect the connector of the electronic-controlled throttle valve.
- With the special tool test harness (MB991658) bridge only the mating terminals of
No. 3, No. 4, No. 5, and No. 6 of the disconnected connectors.
- Ignition switch: ON (engine stopped)
|
Fully close the throttle valve with your finger.
|
0.3 - 0.7 V
|
Fully open the throttle valve with your finger.
|
4.0 V or more
|
11
|
Throttle position sensor (sub)
|
- Remove the intake air hose at the throttle
body.
- Disconnect the connector of the electronic-controlled throttle valve.
- With the special tool test harness (MB991658) bridge only the mating terminals of
No. 3, No. 4, No. 5, and No. 6 of the disconnected connectors.
- Ignition switch: ON (engine stopped)
|
Fully close the throttle valve with your finger.
|
4.0 V or more
|
Fully open the throttle valve with your finger.
|
1.0 V or less
|
12
|
Applied voltage to the throttle position sensor
|
Ignition switch: ON
|
4.9 - 5.1 V
|
14
|
Camshaft position sensor
|
Engine: Cranking
|
0.4 - 4.0 V*1
|
Engine: Idle operation
|
2.5 - 3.9 V*1
|
15
|
Throttle valve control servo (+)
|
- Ignition switch: ON
- Accelerator pedal: fully opened → fully closed
|
Decreases slightly (Approximately 2 V) from the battery voltage
|
16
|
Throttle valve control servo(-)
|
- Ignition switch: ON
- Accelerator pedal: fully closed → fully opened
|
Decreases slightly (Approximately 2 V) from the battery voltage
|
26
|
Engine coolant temperature sensor
|
Ignition switch: ON
|
When engine coolant temperature is -20°C
|
3.9 - 4.5 V
|
When engine coolant temperature is 0°C
|
3.2 - 3.8 V
|
When engine coolant temperature is 20°C
|
2.3 - 2.9 V
|
When engine coolant temperature is 40°C
|
1.3 - 1.9 V
|
When engine coolant temperature is 60°C
|
0.7 - 1.3 V
|
When engine coolant temperature is 80°C
|
0.3 - 0.9 V
|
31
|
Exhaust gas recirculation valve (A) <Except vehicles for Russia>
|
Ignition switch: OFF → ON
|
To initialize, energize exhaust gas recirculation
valve for three seconds and de-energize it
|
32
|
Exhaust gas recirculation valve (B) <Except vehicles for Russia>
|
47
|
Exhaust gas recirculation valve (C) <Except vehicles for Russia>
|
48
|
Exhaust gas recirculation valve (D) <Except vehicles for Russia>
|
33
|
Right bank oxygen sensor (front) heater
|
Engine: Idling operation after warm-up (after 15 seconds
has elapsed)
|
9 - 11 V*1
|
Under the high load operation
|
9 - 11 V*1 → System voltage
|
34
|
Left bank oxygen sensor (front) heater
|
Engine: Idling operation after warm-up (after 15 seconds
has elapsed)
|
9 - 11 V*1
|
Under the high load operation
|
9 - 11 V*1 → System voltage
|
35
|
Left bank oxygen sensor (rear) heater
|
Engine: Idling operation after warm-up (after 15 seconds
has elapsed)
|
1.0 V or less
|
Under the high load operation
|
System voltage
|
36
|
Engine oil pressure switch (for warning lamp)
|
Ignition switch: ON
|
1.0 V or less
|
Engine: Idle operation
|
System voltage
|
37
|
Purge control solenoid valve
|
Ignition switch: ON
|
System voltage
|
Engine: 3,000 r/min after warm-up (when 3 minute has
elapsed)
|
Voltage decreases
|
38
|
Left bank oxygen sensor (front)
|
Engine: Maintain 2,500 r/min after warm-up
|
0.5 <=> 1.4 V (repeat the alteration)
|
39
|
Left bank oxygen sensor (front) offset voltage
|
Ignition switch: ON
|
0.4 - 0.6 V
|
40
|
Left bank oxygen sensor (rear)
|
- Transmission: 2nd
- The engine speed is maintained to 3,500 r/min or more during an accelerated driving with
the throttle full-open
|
1.0 - 1.5 V
|
41
|
Left bank oxygen sensor (rear) offset voltage
|
Ignition switch: ON
|
0.4 - 0.6 V
|
44
|
Applied voltage to the manifold absolute pressure sensor
|
Ignition switch: ON
|
4.9 - 5.1 V
|
45
|
Manifold absolute pressure sensor
|
Ignition switch: ON
|
At 0 m altitude
|
3.8 - 4.2 V
|
At 600 m altitude
|
3.5 - 3.9 V
|
At 1,200 m altitude
|
3.3 - 3.7 V
|
At 1,800 m altitude
|
3.0 - 3.4 V
|
Engine: Idle operation after warm-up
|
0.6 - 1.4 V
|
Engine: While the engine is idling after warm-up, quickly
depress the accelerator pedal
|
Varies depending on the negative pressure at the inlet manifold
|
49
|
Right bank oxygen sensor (rear) heater
|
Engine: Idling operation after warm-up (after 15 seconds
has elapsed)
|
1.0 V or less
|
Under the high load operation
|
System voltage
|
54
|
Right bank oxygen sensor (front)
|
Engine: Maintain 2,500 r/min after warm-up
|
0.5 <=> 1.4 V (repeat the alteration)
|
55
|
Right bank oxygen sensor (front) offset voltage
|
Ignition switch: ON
|
0.4 - 0.6 V
|
56
|
Right bank oxygen sensor (rear)
|
- Transmission: 2nd
- The engine speed is maintained to 3,500 r/min or more during an accelerated driving with
the throttle full-open
|
1.0 - 1.5 V
|
57
|
Right bank oxygen sensor (rear) offset voltage
|
Ignition switch: ON
|
0.4 - 0.6 V
|
58
|
Power steering fluid pressure switch
|
Engine: Idling after warm-up
|
When steering wheel is stationary
|
System voltage
|
Steering wheel: Operated
|
1 V or less
|
60
|
Alternator G terminal
|
- Engine: Idle operation after warm-up
- Radiator fan: Non-operation
- Head lamp switch: OFF → ON
- Stop lamp: OFF → ON
- Rear defogger switch: OFF → ON
|
Voltage rises
|
61
|
Alternator FR terminal
|
- Engine: Idle operation after warm-up
- Radiator fan: Non-operation
- Head lamp switch: OFF → ON
- Stop lamp: OFF → ON
- Rear defogger switch: OFF → ON
|
Voltage decreases
|
62
|
Alternator L terminal
|
Ignition switch: ON
|
0.5 - 2.0 V
|
Engine: Idle operation
|
System voltage
|
64
|
Intake manifold tuning solenoid
|
Engine: Idling operation after warm-up
|
System voltage
|
Engine: 4,000 r/min
|
1.0 V or less
|
72
|
Power supply voltage applied to throttle valve control servo
|
Ignition switch: ON
|
System voltage
|
73
|
Engine control relay
|
Ignition switch: LOCK (OFF)
|
System voltage
|
Ignition switch: ON
|
1.0 V or less
|
74
|
Accelerator pedal position sensor (main)
|
Ignition switch: ON
|
Release the accelerator pedal
|
0.9 - 1.1 V
|
Depress the accelerator pedal fully
|
4.0 V or more
|
75
|
Applied voltage to the accelerator pedal position sensor (main)
|
Ignition switch: ON
|
4.9 - 5.1 V
|
77
|
Accelerator pedal position sensor (sub)
|
Ignition switch: ON
|
Release the accelerator pedal.
|
0.4 - 0.6 V
|
Depress the accelerator pedal fully
|
2.0 V or more
|
78
|
Applied voltage to the accelerator pedal position sensor (sub)
|
Ignition switch: ON
|
4.9 - 5.1 V
|
82
|
Power supply
|
Ignition switch: ON
|
System voltage
|
84
|
Throttle valve control servo relay
|
Ignition switch: ON → LOCK (OFF)
|
1.0 V or less → System voltage → 1.0 V or less
|
87
|
Air flow sensor
|
Engine: Gradually increase the speed
|
Voltage increase in response to revving
|
89
|
Intake air temperature sensor
|
Ignition switch: ON
|
When the intake air temperature is -20°C
|
3.8 - 4.4 V
|
When the intake air temperature is 0°C
|
3.2 - 3.8 V
|
When the intake air temperature is 20°C
|
2.3 - 2.9 V
|
When the intake air temperature is 40°C
|
1.5 - 2.1 V
|
When the intake air temperature is 60°C
|
0.8 - 1.4 V
|
When the intake air temperature is 80°C
|
0.4 - 1.0 V
|
92
|
Ignition switch - IG
|
Ignition switch: ON
|
System voltage
|
96
|
Fuel pump relay
|
Ignition switch: ON
|
System voltage
|
Engine: Idle operation
|
1.0 V or less
|
102
|
A/C compressor relay
|
- Engine: Idle operation
- A/C switch: OFF → ON
(when the compressor is active)
|
System voltage → 1.0 V or less
|
104
|
Backup power supply
|
Ignition switch: LOCK (OFF)
|
System voltage
|
105
|
Ignition switch - ST
|
Engine: Cranking
|
8 V or more
|
106
|
Starter relay
|
Engine: Cranking
|
System voltage
|
Engine: Idle operation
|
1.0 V or less
|
|
|
3.Measure the resistance and check for continuity between the terminals of the engine-ECU
harness-side connector while referring to the check chart.
| note |
- When measuring resistance and checking continuity, a harness for checking contact
pin pressure should be used instead of inserting a test probe.
- Checking need not be carried out in the order given in the chart.
|
| caution |
If the terminals that should be checked are mistaken, or
if connector terminals are not correctly shorted to earth, damage may be caused to the vehicle
wiring, sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!
|
|
|
|
4.If the ohmmeter shows any deviation from the standard value, check the corresponding
sensor, actuator and related electrical wiring, and the repair or replace.
|
