Mazda 626 - On-Board Diagnostic

ON-BOARD DIAGNOSTIC
ON-BOARD DIAGNOSTIC
OUTLINE
Except for GF4A-EL Models
• The DTCs and PIDs (monitoring items and simulation items) are essentially carried over from the MPV (LW)
FS engine models.
DTC
Except for GF4A-EL Models
• The DTCs for the fuel and emission control systems are as shown in the following table.
DTC table
x : Applied
- : Not Applied
DTC
Diagnosed
circuit
Detection condition
Fail-safe
Memory
function
P0102
MAF sensor
PCM monitors input voltage from MAF
sensor when engine is running. If input
voltage at PCM terminal 88 is below 0.3 V,
PCM determines that MAF circuit has
malfunction.
• Adjusts charging
efficiency to set value
• Adjusts ignition timing
to fixed value (6°CA)
• Stops fuel cut-off at
shifting (ATX)
X
P0103
PCM monitors input voltage from MAF
sensor when engine is running. If input
voltage at PCM terminal 88 is above 4.3 V,
PCM determines that MAF circuit has
malfunction.
X
P0112
IAT sensor
PCM monitors input voltage from IAT sensor
when engine is running. If input voltage at
PCM terminal 39 is below 0.2 V, PCM
determines that IAT circuit has malfunction.
• Sets intake air
temperature for
engine control 20°C
{68° F}
• Illuminates generator
warning light
• Stops fuel cut-off at
shifting (ATX)
X
P0113
PCM monitors input voltage from IAT sensor
when engine is running. If input voltage at
PCM terminal 39 is above 4.6 V, PCM
determines that IAT circuit has malfunction.
X
P0117
ECT sensor
PCM monitors input voltage from ECT
sensor when engine is running. If input
voltage at PCM terminal 38 is below 0.2 V,
PCM determines that ECT circuit has
malfunction.
• Sets engine coolant
temperature for
engine control 40° C
{104° F }
• Sets engine coolant
temperature for IAC
control 80° C {176^ }
X
P0118
PCM monitors input voltage from ECT
sensor when engine is running. If input
voltage at PCM terminal 38 is above 4.6 V,
PCM determines that ECT circuit has
malfunction.
X
P0122
TP sensor
PCM monitors input voltage from TP sensor
when engine is running. If input voltage at
PCM terminal 89 is below 0.1 V, PCM
determines that TP circuit has malfunction.
Sets throttle opening
angle for engine control
open
X
P0123
PCM monitors input voltage from TP sensor
when engine is running. If input voltage at
PCM terminal 89 is above 4.8 V, PCM
determines that TP circuit has malfunction.
X
F1-15