Dtc B1251/B1253/B1255/B1257/B1274/B1275/B1282/B1283, B1947/B2014/B1260/B1261 - Mazda CX-7 2007 Workshop Manual

DTC B1251, B1253, B1255, B1257, B1274, B1275, B1282, B1283, B1947, B2014 (MULTIPLE DTCS
INDICATED)
DTC B1251,
B1253, B1255,
B1257, B1947,
Climate control unit (+5 V power supply or sensor ground) system
B2014, B1282,
B1283, B1274,
B1275
• Open circuit in wiring harnesses between climate control unit and each temperature sensor, air mix
POSSIBLE
CAUSE actuator, or airflow mode actuator
Diagnostic Procedure
STEP
• Disconnect the climate control unit connector and
1
the evaporator temperature sensor connector.
• Is there an open circuit in the wiring harness
between climate control unit terminal C and
evaporator temperature sensor terminal A?
CLIMATE CONTROL UNIT CONNECTOR
Q O M
W U S
X V T R P N
End Of Sie
DTC B1260, B1261
DTC B1260,
Solar radiation sensor system
B1261
• Solar radiation sensor malfunction
POSSIBLE
• Open or short circuit in wiring harness between climate control unit and solar radiation sensor
CAUSE
Diagnostic Procedure
STEP
• Inspect the solar radiation sensor. (See 07-40-23
1
SOLAR RADIATION SENSOR INSPECTION.)
• Is it normal?
• Disconnect the climate control unit connector and
2
the solar radiation sensor connector.
• Is there continuity between the following terminals
of the climate control unit and the solar radiation
sensor?
— E— B
— J— A
• Is there a short circuit to ground in the wiring
3
harness between climate control unit terminal E
and solar radiation sensor terminal B?
CLIMATE CONTROL UNIT CONNECTOR
Q
W U S
X V T R
End Of Sie
07-02–4
ON-BOARD DIAGNOSTIC
INSPECTION
K I G C A
E
L H D
J F B
INSPECTION
O K I G C
M E
L D
P N J H F
Yes Repair the wiring harness.
No Inspect the connection of the climate control unit
connector.
EVAPORATOR TEMPERATURE SENSOR CONNECTOR
Yes Go to the next step.
No Replace the solar radiation sensor. (See 07-40-22
SOLAR RADIATION SENSOR REMOVAL/
INSTALLATION.)
Yes Go to the next step.
No Repair the wiring harness.
Yes Repair the wiring harness.
No Inspect the connection of the climate control unit
connector. (See 07-40-13 CLIMATE CONTROL UNIT
INSPECTION [FULL-AUTO AIR CONDITIONER].)
SOLAR RADIATION SENSOR CONNECTOR
A
B
id070200800400
ACTION
B A
id070200800500
ACTION
B A