DTC P0070:14 [BCM]

id0902f5931300

DESCRIPTION

Ambient temperature sensor circuit malfunction
DETECTION CONDITION
•  Ambient temperature sensor circuit voltage is out of range for 3 s or more.
POSSIBLE CAUSE
•  Ambient temperature sensor connector or terminals malfunction
•  BCM connector or terminals malfunction
•  Short to ground in wiring harness between the following terminals:
―  Ambient temperature sensor terminal A—BCM terminal 1X
―  Ambient temperature sensor terminal B—BCM terminal 1H
•  Short to power supply in wiring harness between the following terminals:
―  Ambient temperature sensor terminal A—BCM terminal 1X
―  Ambient temperature sensor terminal B—BCM terminal 1H
•  Open circuit in wiring harness between the following terminals:
―  Ambient temperature sensor terminal A—BCM terminal 1X
―  Ambient temperature sensor terminal B—BCM terminal 1H
•  Ambient temperature sensor malfunction
•  BCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
CONFIRM BCM DTC
•  Clear the DTC using the M-MDS.
•  Switch the ignition to ON and wait for 3 s or more.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Go to the next step.
No
Go to Step 9.
2
INSPECT AMBIENT TEMPERATURE SENSOR CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the ambient temperature sensor connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 8.
No
Go to the next step.
3
INSPECT BCM CONNECTOR AND TERMINALS
•  Disconnect the BCM connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 8.
No
Go to the next step.
4
INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND
•  Ambient temperature sensor and BCM connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Ambient temperature sensor terminal A
―  Ambient temperature sensor terminal B
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 8.
No
Go to the next step.
5
INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY
•  Ambient temperature sensor and BCM connectors are disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the following terminals (wiring harness-side):
―  Ambient temperature sensor terminal A
―  Ambient temperature sensor terminal B
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
No
Go to the next step.
6
INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Ambient temperature sensor and BCM connectors are disconnected.
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Ambient temperature sensor terminal A—BCM terminal 1X
―  Ambient temperature sensor terminal B—BCM terminal 1H
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 8.
7
INSPECT AMBIENT TEMPERATURE SENSOR
•  Ambient temperature sensor and BCM connectors are disconnected.
•  Reconnect the ambient temperature sensor connector.
•  Reconnect the negative battery cable.
•  Inspect the ambient temperature sensor.
•  Is there any malfunction?
Yes
Replace the ambient temperature sensor, then go to the next step.
(See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
No
Go to the next step.
8
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Switch the ignition to ON and wait for 3 s or more.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the BCM, then go to the next step.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [L.H.D.].)
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [R.H.D.].)
No
Go to the next step.
9
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
No
DTC troubleshooting completed.