Mazda 626 Station Wagon, Workshop Manual, Page: 194 / 577

CONTROL SYSTEM
CONTROL SYSTEM
PC M INSPECTION
Using SST (NGS tester)
Note
• PIDs for the following parts are not available
on this model. Go to the appropriate part
inspection page.
1. Water temperature sender unit (integrated
with engine coolant temperature (ECT)
sensor) (See Section F2.)
2. PCM control relay (See Section F2.)
3. FSO solenoid (See Section F2.)
4. Spill valve (See Section F2.)
5. Spill valve relay (See Section F2.)
1. Connect the NGS tester to the DLC. (See Section
F2.)
2. Turn the engine switch on.
3. Select the “PID/DATA MONITOR AND RECORD”
function on the NGS tester display and press
TRIGGER. (See Section F2.)
4. Select the appropriate PID on the NGS tester
display and press START.
5. Measure the PID value.
• If PID value is not within the specification,
follow the instruction in ACTION column.
Note
• When measuring the following PID value,
inspect the following:
• TP V PID (See Section F2.)
Note
• Perform the SIMULATION TEST for the output
device (A/C RLY, FAN2, FAN3, EGR PV, GLW
RLY, GLW LP) after PID/DATA measurement
is completed.
PID MONITOR Table
Monitor item
(Definition)
Unit/
Condition
Condition/Specification Action
PCM
terminal
A/C RLY
(A/C relay)
ON/OFF
Engine switch is on: OFF
A/C switch is on and fan switch is on
at idle: ON
Inspect following PIDs: RPM, TP V,
ECTV, A/CSW.
Inspect A/C relay.
See Section U
10
A/C SW
(A/C switch)
ON/OFF
A/C switch and fan switch is on at
engine switch on: ON
A/C switch is off at engine switch on:
OFF
Inspect refrigerant pressure switch.
See Section U
1S
B+
(Battery positive
voltage)
V Engine switch is on: B
4
Inspect main relay.
See Section F2
Inspect battery.
See Section G
1B
BARO
(Barometric
pressure
In PCM)
kPa
Hg
Below 400m {0.25 mile} above sea
level:
100—103 kPa {29.5—30.4 inHg}
DTC P0105 is indicated.
Follow DTC Troubleshooting
See Section F2
-
CTPSW
(Idle switch)
ON/OFF
Accelerator pedal is depressed:OFF
Accelerator pedal is released: ON
Inspect idle switch.
See F2-21 IDLE SWITCH
INSPECTION
1T
ECT
(Engine coolant
temperature)
°C °F
Engine coolant temperature is 20°C
{68
°F}: 20 °C
{68
°F}
Engine coolant temperature is 60°C
{140 °F}: 60 °C {140 °F}
Inspect ECT sensor.
See Section F2
2G
ECT V
(Engine coolant
temperature
signal voltage)
V
Engine coolant temperature is 20 °C
{68
°F}: 2.9—3.1 V
After warm up: Below 1.0 V
Inspect ECT sensor.
See Section F2
2G
EGRP V
(EGR valve
position signal
voltage)
V
Engine switch is on: 0.4— 0.6 V
Idle: 1.3— 1
.6
V
Inspect EGR valve position sensor.
See Section F
2
2J
EGRVAC
(EGR solenoid
valve (vacuum))
%
Engine switch is on: 0%
Idle: 0— 100% Inspect EGR solenoid valve (vacuum).
See Section F2
1
K
EGRVENT
(EGR solenoid
valve (vent))
%
Engine switch is on: 0%
Idle: 0—100%
Inspect EGR solenoid valve (vent).
See Section F2
10
F2-18