Mazda 626 Station Wagon, Workshop Manual

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ON-BOARD DIAGNOSTIC
DTC
Diagnosed
circuit
Detection condition Fail-safe
Memory
function
P1634 Generator
PCM monitors input voltage from generator
and battery positive terminal. If PCM detects
generator output voltage above 18.5 V and
battery voltage below 16.5 V for 5 seconds
while engine is running, PCM determines
that charging system has malfunction.
X
PID/DATA MONITOR AND RECORD
Except for G F4A -E L Models
• The PID monitoring items for the fuel and emission control systems are as shown in the following table.
PID/DATA monitor table
Monitor item
(Display on NGS tester)
Monitoring item
Condition/
unit
PCM
terminal
A/CRLY
A/C relay
ON/OFF
96
A/C SW Refrigerant pressure switch (high, low pressure), A/C switch ON/OFF 41
ALTF Generator field coil duty value % 53
ALTTV Generator output voltage V 30
B+ B+
V
55
BRKSW Brake switch ON/OFF 92
CHRGLMP Generator warning light ON/OFF 42
ECT Engine coolant temperature °C/°F 38
ECTV
Engine coolant temperature signal voltage
V 38
FAN2 Condenser fan control
ON/OFF
45
FAN3 Cooling fan control
ON/OFF 47
FH02S H02S
V 60
FH02SH H02S heater control ON/OFF 94
FP RLY Fuel pump relay control
ON/OFF
70*1/80*2
IACV IAC valve control
ms 54,83
IAT Intake air temperature
°C/°F 39
IATV Intake air temperature signal voltage
V
39
IGT Ignition timing BTD 26,52
INJ Fuel injection duration ms
74,75,
100,101
KR Knocking retard DEG 57
MAFV MAF signal voltage
V
88
NL SW
Neutral switch
ON/OFF 64
PRCV
Pressure regulator control
ON/OFF 95
PRGV Purge solenoid valve duty value % 67
PSPSW PSP switch ON/OFF
31
RPM
Engine speed
RPM 21,22
RPM DES Target idle speed RPM —
SEGRP EGR valve stepping motor position Step
46, 56,
68,72
TEN TEN terminal condition (in DLC) ON/OFF 5
TP V TP sensor signal voltage V 89
VS Vehicle speed
KPH/MPH
58
*1: With immobilizer system
*2: Without immobilizer system
F 1-18