B1601

B1601-LEFT SOLAR SENSOR CIRCUIT LOW





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With ignition on.

- Set Condition:
If the Left Sunload Sensor input is out of range toward the low voltage threshold.





NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored. Refer to HVAC System Test (ATC) for stored DTC test procedures. ATC

1. CHECK FOR DTC B1601-LEFT SOLAR SENSOR CIRCUIT LOW WITH SUN SENSOR HARNESS CONNECTOR DISCONNECTED




1. Turn the ignition off.
2. Disconnect the Sun Sensor harness connector.
3. Turn the ignition on.
4. With the scan tool, erase HVAC DTCs.
5. Turn the ignition off, wait 10 seconds, and turn the ignition on.
6. With the scan tool, read HVAC DTCs.

Does the scan tool display: B1601-LEFT SOLAR SENSOR CIRCUIT LOW?

Yes

- Go To 2

No

- Replace the Sun Sensor.
- Perform BODY VERIFICATION TEST Body Verification Test.

2. CHECK (G39) SUN SENSOR NO. 1 SIGNAL CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the A/C Heater Control C1 harness connector.
3. Measure the resistance of the (G39) Sun Sensor No. 1 Signal circuit between ground and the A/C Heater Control C1 harness connector.

Is the resistance below 10k ohms?

Yes

- Repair the (G39) Sun Sensor No. 1 Signal circuit for a short to ground.
- Perform BODY VERIFICATION TEST Body Verification Test.

No

- Go To 3

3. CHECK (G39) SUN SENSOR NO. 1 SIGNAL CIRCUIT FOR A SHORT TO (G939) SUN SENSOR RETURN CIRCUIT




1. Measure the resistance between the (G39) Sun Sensor No. 1 Signal circuit and the (G939) Sun Sensor Return circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 10k ohms?

Yes

- Repair the (G39) Sun Sensor No. 1 Signal circuit for a short to the (G939) Sun Sensor Return circuit.
- Perform BODY VERIFICATION TEST Body Verification Test.

No

- Replace the A/C Heater Control.
- Perform BODY VERIFICATION TEST Body Verification Test.