DTC B0163, B0183, or B1405
Diagnostic Instructions
DTC Descriptors
| DTC B0163 02: Passenger Compartment
Temperature Sensor Circuit Short to Ground |
| DTC B0163 05: Passenger Compartment
Temperature Sensor Circuit High Voltage/Open |
| DTC B0183 02: Solar Load Sensor Circuit Short
to Ground |
| DTC B0183 05: Solar Load Sensor Circuit High
Voltage/Open |
| DTC B1405 02: Control Module Voltage Reference
Output 2 Circuit Short to Ground |
| DTC B1405 05: Control Module Voltage Reference
Output 2 Circuit High Voltage/Open |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ambient Light/Sunload Sensor 12V Reference
|
B1405 02
|
B1405 05
|
B1405 05
|
-
|
Passenger Compartment Temperature Sensor Signal
|
B0163 02
|
B0163 05
|
B0163 05
|
1
|
Sunload Sensor Signal
|
B0183 02
|
B0183 05
|
B0183 05
|
1
|
Ambient Light/Sunload Sensor Ground
|
-
|
B0163 05, B0183 05, B1405 05
|
-
|
-
|
1. Air Temperature Malfunction
|
|
| |
Circuit/System Description
The ambient light/sunload sensor includes the sunload sensor and
passenger compartment temperature sensor.
This sensor assembly provides information about:
| • |
Passenger compartment
temperature |
The sunload sensor is connected to ground and to a 12 V clocked
power supply through the HVAC control module. This clocked power
supply is to power the sensor electronics and to work as a clock
generator to the sunload sensor micro controller. The sensor uses a
pulse signal for data identification and transferring the sun
intensity measurement. At each positive transition from the clocked
supply input, the sunload sensor micro controller will shift
channels enabling new intensity measurement on the signal output to
the HVAC control module. The signal voltage varies between 0-4
V.
The passenger compartment temperature sensor is a negative
temperature co-efficient thermistor. A signal and low reference
circuit enables the sensor to operate. As the air temperature
increases, the sensor resistance decreases. The sensor signal
varies between 0-5 V.
Bright or high intensity light causes the vehicles interior
temperature to increase. The HVAC system compensates for the
increased temperature by diverting additional cool air into the
vehicle.
Conditions for Running the DTC
| • |
The HVAC control module is
ON. |
Conditions for Setting the DTC
B0163 02 or B0163 05
The HVAC control module detects the sensor signal out of range. The
signal voltage is less than 0.1 V or greater than 4.9 V for more
than 50 ms.
B0183 02
The 5 V identification pulse is not received.
B0183 05
The input signal is static and greater than 4.8 V.
B1405 02
Clocked supply for multi zone sensor is shorted to ground.
B1405 05
Clocked supply for multi zone sensor is shorted to voltage or open.
Action Taken When the DTC Sets
| • |
The system will use the last
valid values as default. |
| • |
If no value is read at the
time of fault, the HVAC Control Module uses 0 W/m² as
intensity, 45° for elevation and -75° for azimuth.
|
Conditions for Clearing the DTC
B0163 02 or B0163 05
The sensor signal is within specified range between 0.1-4.9 V.
B0183 02
The 5 V identification pulse will be received.
B0183 05
The correct pulse signal succession will be received.
B1405 02 or B1405 05
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
HVAC Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Automatic HVAC Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Verify that DTC B1405 02 or
B1405 05 is not set. |
⇒ If DTC B1405 is
set
Refer to Ambient Light/Sunload Sensor
Power Supply Malfunction. ⇓
If DTC B1405 is not set
| 2. |
Verify that DTC B0163 02 or
B0163 05 is not set. |
⇒ If DTC B0163 is
set
Refer to Passenger Compartment
Temperature Sensor Circuit Malfunction.
⇓ If DTC B0163 is
not set
| 3. |
Verify that DTC B0183 02 or
B0183 05 is not set. |
⇒ If DTC B0183 is
set
Refer to Sunload Sensor Circuit
Malfunction. ⇓ If
DTC B0183 is not set
| 4. |
Measure actual inside air
temperature using a thermometer. Compare this value to the scan
tool Passenger Compartment Air Temperature parameter. The measured
temperature should be within 5°C (9°F) difference of
parameter value. |
⇒ If not within the
specified range
Replace the B10B Ambient
Light/Sunload Sensor. ⇓
If within the specified range
Circuit/System Testing
Ambient Light/Sunload Sensor Power Supply Malfunction
| 1. |
Ignition OFF, remove the
ignition key, open the driver door, disconnect the scan tool and
disconnect the harness connector at the B10B Ambient Light/Sunload
Sensor. |
| 2. |
Wait for 1 min, test for less
than 5 Ω between the B10B Ambient Light/Sunload Sensor low
reference circuit terminal 6 and ground. |
⇒ If 5 Ω or
greater
| |
2.1 |
Disconnect the X1 harness
connector at the K33 HVAC Control Module. |
| |
2.2 |
Test for less than 2 Ω
between the K33 HVAC Control Module low reference circuit terminal
7 X1 and the low reference circuit terminal 6 at the B10B Ambient
Light/Sunload Sensor. |
| ⇒ |
If 2 Ω or greater, repair the open/high resistance in the
circuit. |
| ⇒ |
If less than 2 Ω, replace the K33 HVAC Control
Module. |
⇓ If less than 5
Ω
| 3. |
Disconnect the X1 harness
connector at the K33 HVAC Control Module, ignition ON. |
| 4. |
Test for less than 0.3 V
between the reference voltage circuit terminal 2 and ground.
|
⇒ If greater than
0.3 V
Repair the short to voltage on the
circuit. ⇓ If less
than 0.3 V
| 6. |
Test for infinite resistance
between the reference voltage circuit terminal 2 and ground.
|
⇒ If less than
infinite resistance
Repair the short to ground on the
circuit. ⇓ If
infinite resistance
| 7. |
Test for less than 5 Ω
between the B10B Ambient Light/Sunload Sensor reference voltage
circuit terminal 2 and control circuit terminal 20 X1 at the K33
HVAC Control Module harness connector. |
⇒ If 5 Ω or
greater
Repair the open/high resistance in
the circuit. ⇓ If
less than 5 Ω
| 8. |
Replace the B10B Ambient
Light/Sunload Sensor and verify the DTC does not reset.
|
⇒ If DTC
resets
Replace the K33 HVAC Control Module.
⇓ If DTC does not
reset
Passenger Compartment Temperature Sensor Circuit
Malfunction
| 1. |
Ignition OFF, remove the
ignition key, open the driver door, disconnect the scan tool and
disconnect the harness connector at the B10B Ambient Light/Sunload
Sensor. |
| 2. |
Wait for 1 min, test for less
than 5 Ω between the B10B Ambient Light/Sunload Sensor low
reference circuit terminal 6 and ground. |
⇒ If 5 Ω or
greater
| |
2.1 |
Disconnect the X1 harness
connector at the K33 HVAC Control Module. |
| |
2.2 |
Test for less than 2 Ω
between the K33 HVAC Control Module low reference circuit terminal
7 X1 and the low reference circuit terminal 6 at the B10B Ambient
Light/Sunload Sensor. |
| ⇒ |
If 2 Ω or greater, repair the open/high resistance in the
circuit. |
| ⇒ |
If less than 2 Ω, replace the K33 HVAC Control
Module. |
⇓ If less than 5
Ω
| 4. |
Test for 4.8-5.2 V between the
signal circuit terminal 3 and ground. |
⇒ If less than 4.8
V
| |
4.1 |
Ignition OFF, disconnect the
X1 harness connector at the K33 HVAC Control Module. |
| |
4.2 |
Test for infinite resistance
between the signal circuit and ground. |
| ⇒ |
If less than infinite resistance, repair the short to ground on
the circuit. |
| |
4.3 |
Test for less than 2 Ω
in the signal circuit end to end. |
| ⇒ |
If 2 Ω or greater, repair the open/high resistance in the
circuit. |
| ⇒ |
If less than 2 Ω, replace the K33 HVAC Control
Module. |
⇒ If greater than
5.2 V
| |
4.1 |
Ignition OFF, disconnect the
X1 harness connector at the K33 HVAC Control Module, ignition
ON. |
| |
4.2 |
Test for less than 0.3 V
between the signal circuit and ground. |
| ⇒ |
If greater than 0.3 V, repair the short to voltage on the
circuit. |
| ⇒ |
If less than 0.3 V, replace the K33 HVAC Control Module. |
⇓ If within 4.8-5.2
V
| 5. |
Replace the B10B Ambient
Light/Sunload Sensor and verify the DTC does not reset.
|
⇒ If DTC
resets
Replace the K33 HVAC Control Module.
⇓ If DTC does not
reset
Sunload Sensor Circuit Malfunction
| 1. |
Ignition OFF, disconnect the
harness connector at the B10B Ambient Light/Sunload Sensor and the
X1 harness connector at the K33 HVAC Control Module, ignition
ON. |
| 2. |
Test for less than 0.3 V
between the signal circuit terminal 4 and ground. |
⇒ If greater than
0.3 V
Repair the short to voltage on the
circuit. ⇓ If less
than 0.3 V
| 4. |
Test for infinite resistance
between the signal circuit terminal 4 and ground. |
⇒ If less than
infinite resistance
Repair the short to ground on the
circuit. ⇓ If
infinite resistance
| 5. |
Test for less than 5 Ω
between the B10B Ambient Light/Sunload Sensor signal circuit
terminal 4 and control circuit terminal 13 X1 at the K33 HVAC
Control Module harness connector. |
⇒ If 5 Ω or
greater
Repair the open/high resistance in
the circuit. ⇓ If
less than 5 Ω
| 6. |
Replace the B10B Ambient
Light/Sunload Sensor and verify the DTC does not reset.
|
⇒ If DTC
resets
Replace the K33 HVAC Control Module.
⇓ If DTC does not
reset
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
