B1343

DTC B1343
Solar sensor, open circuit.

Conditions
Control module input pin 34, open circuit or shorted to Batt+

Diagnostic Procedure

NOTE: If diagnostic trouble code B1515 has been generated it should be dealt with first. B1515

1. Connect the ISAT and obtain a "SOLAR SENSOR VALUE" readout This value should vary between 0 and 0.155 V, depending on light intensity.
Illuminate the solar sensor with a lamp (incandescent bulb) and check that the voltage increases. Since the solar sensor mainly measures infrared radiation (heat), a fluorescent lamp cannot be used for this test.
2. Unplug the solar sensor's connector and measure the voltage at the connector. It should be about 4.5 - 5 V. If not, proceed to point 4.
3. Illuminate the solar sensor with a lamp and at the same time measure the voltage across the sensor's connections. It should be 0 - 0.5 V.
If no voltage reading can be obtained, install a new solar sensor. Clear the diagnostic trouble code and check whether it is generated afresh.
4. Unplug the ACC control module's connector. Plug a BOB into the connector and check the wiring for continuity as follows:
- take a reading across pin 4 of the solar sensor's connector and pin 35 of the ACC control module.
- take a reading across pin 3 of the solar sensor and pin 34 of the ACC control module.
Rectify any fault in the wiring.
5. If the fault persists, proceed to "Before Changing A Control Module". Testing and Inspection