PCM INSPECTION [WLT-1, WLT-2]
id014096802500
1. Remove the driver’s side front side trim. (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)
2. Remove the PCM with the connector connected. (See PCM REMOVAL/INSTALLATION [WLT-1, WLT-2].)
3. Measure the voltage of each PCM terminals by using a voltmeter.
4. If the output voltage is not normal while each input voltage is normal, inspect the related device system. When they are normal, replace the PCM.
5. Install the PCM. (See PCM REMOVAL/INSTALLATION [WLT-1, WLT-2].)
6. Install the driver’s side front side trim. (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)
Terminal voltage table (Reference)
|
Terminal |
Signal |
Connected to |
Test condition |
Voltage (V) |
Inspection item |
|
|---|---|---|---|---|---|---|
|
A*1
|
—
|
—
|
—
|
—
|
—
|
|
|
A*2
|
Constant voltage
|
• Control lever position sensor
• EGR valve position sensor
|
Engine switch
|
ON
|
Approx. 5.0
|
• Inspect related wiring harness
|
|
OFF
|
Below 1.0
|
|||||
|
Idle
|
Approx. 5.0
|
|||||
|
B
|
System ground
|
Ground
|
Constant
|
Below 1.0
|
• Inspect related wiring harness
|
|
|
C
|
FICD control
|
FICD solenoid valve No.1
|
Idle
|
ECT is below 20 °C {68 °F}
|
Below 1.0
|
• FICD solenoid valve No.1
• Inspect related wiring harness
|
|
ECT is above 20 °C {68 °F}
|
B+
|
|||||
|
D
|
Start
|
Engine switch (Starter)
|
Engine switch is on.
|
Below 1.0
|
• Inspect related wiring harness
|
|
|
While cranking
|
Approx. 10
|
|||||
|
E
|
ECT
|
ECT sensor
|
Engine switch is on.
|
ECT is 20 °C {68 °F}
|
Approx. 3.1
|
• Engine coolant temperature sensor
• Inspect related wiring harness
|
|
After warm-up
|
Approx. 0.8
|
|||||
|
F
|
Engine speed (Input)
|
CKP sensor
|
Engine switch is on.
|
Approx. 0
|
• CKP sensor
• Inspect related wiring harness
|
|
|
Idle
|
Approx. 0.05
|
|||||
|
G
|
A/C (With A/C)
|
Temperature control dial
|
Engine switch is on.
|
Temperature control dial is off and fan switch is off.
|
B+
|
• Microswitch
• Fan switch
• Inspect related wiring harness
|
|
Temperature control dial is at position other than off and fan switch is on.
|
Below 1.0
|
|||||
|
H*1
|
—
|
—
|
—
|
—
|
—
|
|
|
H*2
|
Idle (Control lever open or close)
|
Idle switch
|
Engine switch is on.
|
Accelerator pedal is depressed.
|
B+
|
• Idle switch
• Inspect related wiring harness
|
|
Accelerator pedal is released.
|
Below 1.0
|
|||||
|
I
|
Glow plug voltage
|
Glow plug
|
ECT is below 60 °C
{140 °F}
|
For less than approx. 15 sec after turning engine switch on.
|
B+
|
• Inspect related wiring harness
|
|
Over approx. 15 sec after turning engine switch on.
|
Below 1.0
|
|||||
|
For less than 10 min after starting engine.
|
B+
|
|||||
|
Over 10 min after starting engine.
|
Below 1.0
|
|||||
|
While cranking
|
B+
|
|||||
|
ECT is above 60 °C
{140 °F}
|
For less than approx. 2 sec after turning engine switch on.
|
B+
|
||||
|
Over approx. 2 sec after engine switch on
|
Below 1.0
|
|||||
|
While cranking
|
B+
|
|||||
|
J*1
|
Power supply
|
Engine switch
|
Engine switch
|
OFF
|
Below 1.0
|
• Engine switch
• Inspect related wiring harness
|
|
ON
|
B+
|
|||||
|
J*2
|
Control lever position (Detection)
|
Control lever position sensor
|
Engine switch is on.
|
Accelerator pedal is fully open.
|
Approx. 4.2
|
• Control lever position sensor.
• Inspect related wiring harness
|
|
Accelerator pedal is fully closed.
|
Approx. 0.8—1.5
|
|||||
|
K
|
Engine speed (Output)
|
Instrument cluster
|
Engine switch is on.
|
B+
|
• Inspect related wiring harness
|
|
|
Idle
|
6.9—7.1
|
|||||
|
L*1
|
A/C control (With A/C)
|
A/C relay
|
Engine switch is on.
|
B+
|
• A/C relay
• Inspect related wiring harness
|
|
|
Idle
|
A/C is not operating
|
B+
|
||||
|
A/C is operating
|
Below 1.0
|
|||||
|
L*2
|
Power supply
|
Engine switch
|
Engine switch
|
OFF
|
Below 1.0
|
• Engine switch
• Inspect related wiring harness
|
|
ON
|
B+
|
|||||
|
M
|
Glow indicator light control
|
Glow indicator light
|
Engine switch is off.
|
Below 1.0
|
• Glow indicator light
• Inspect related wiring harness
|
|
|
Engine switch is on and within approx. 4.5 sec. (25 °C {77 °F})
|
||||||
|
Over 4.5 sec (25 °C {77 °F}) after turning engine switch on.
|
B+
|
|||||
|
N*1
|
—
|
—
|
—
|
—
|
—
|
|
|
N*2
|
A/C control (With A/C)
|
A/C relay
|
Engine switch is on.
|
B+
|
• A/C relay
• Inspect related wiring harness
|
|
|
Idle
|
A/C is not operating
|
B+
|
||||
|
A/C is operating
|
Below 1.0
|
|||||
|
O
|
Glow system
|
Glow plug relay
|
Engine coolant temperature is below 60 °C {140 °F}
|
For less than approx. 15 sec after turning engine switch on.
|
B+
|
• Inspect glow plug relay
• Inspect related wiring harness
|
|
Over approx. 15 sec after turning engine switch on.
|
Below 1.0
|
|||||
|
For less than 10 min after starting engine.
|
B+
|
|||||
|
Over 10 min after starting engine.
|
Below 1.0
|
|||||
|
While cranking
|
B+
|
|||||
|
Engine coolant temperature is above 60 °C {140 °F}
|
For less than approx. 2 sec after turning engine switch on.
|
B+
|
||||
|
Over approx. 2 sec after engine switch on
|
Below 1.0
|
|||||
|
While cranking
|
B+
|
|||||
|
P
|
FICD control
|
FICD solenoid valve No.2
|
Idle
|
• Temperature control dial is not at OFF.
• ECT is below 60 °C {140 °F}
|
Below 1.0
|
• FICD solenoid valve No.2
• Inspect related wiring harness
|
|
• Temperature control dial is not at OFF.
• ECT is above 60 °C {140 °F}
|
B+
|
|||||
|
Q*1
|
—
|
—
|
—
|
—
|
—
|
|
|
Q*2
|
Timer control
|
TCV
|
Engine switch is on.
|
B+
|
• TCV
• Inspect related wiring harness
|
|
|
Idle
|
Below 1.0
|
|||||
|
R*1
|
—
|
—
|
—
|
—
|
—
|
|
|
R*2
|
EGR valve control
|
EGR solenoid valve
|
Engine switch is on.
|
B+
|
• EGR solenoid valve
• Inspect related wiring harness
|
|
|
Idle
|
Below 1.0
|
|||||
|
S*1
|
—
|
—
|
—
|
—
|
—
|
|
|
S*2
|
Diagnostic test mode
|
Data link connector (DLC) (Terminal TEN)
|
Engine switch is on.
|
Open terminal TEN
|
B+
|
• Inspect related wiring harness
|
|
Short terminal TEN
|
Below 1.0
|
|||||
|
T*1
|
—
|
—
|
—
|
—
|
—
|
|
|
T*2
|
DTC output
|
Data link connector (DLC) (Terminal FEN)
|
No DTC output
|
Below 1.0
|
• Inspect related wiring harness
|
|
|
DTC output
|
0—B+
|
|||||