B1601

B1601-LEFT SOLAR SENSOR CIRCUIT LOW







- When Monitored:
With the ignition on.

- Set Condition:
If the Left Sun Sensor Signal input voltage is less than 0.16 of a volt for period of 30 seconds.





Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview.

1. CHECK IF THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read HVAC DTCs.

NOTE: It can take up to 30 seconds or more for this DTC to mature.

Is this DTC active?

Yes

- Go To 2

No

- Go To 4

2. CHECK (G39) SUN SENSOR SIGNAL 1 CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off to the lock position.
2. Disconnect the A/C Heater Control C1 harness connector.
3. Disconnect the Sun Sensor harness connector.
4. Measure the resistance between ground and the (G39) Sun Sensor Signal 1 circuit.

Is the resistance below 100k ohms?

Yes

- Repair the (G39) Sun Sensor Signal 1 circuit for a short to ground.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

No

- Go To 3

3. CHECK THE SUN SENSOR AND A/C HEATER CONTROL
1. Replace the Sun Sensor.
2. Perform HVAC VERIFICATION TEST HVAC Verification Test.

Did this DTC reset while performing the HVAC Verification Test?

Yes

- Replace and program the A/C Heater Control.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

No

- Test complete.

4. CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, partially broken wires.
4. Check the connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
5. Wiggle the wiring and connectors while checking for shorted and open circuits.
6. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.

Were there any problems found?

Yes

- Repair as necessary.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

No

- Test complete.