B1604

B1604-RIGHT SOLAR SENSOR CIRCUIT LOW (ATC)

For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL .

- When Monitored:
With the ignition on.

- Set Condition:
If the Right 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. Heating-A/C System Diagnostics

Diagnostic Test

1. CHECK FOR ACTIVE DTC WITH SUN SENSOR HARNESS CONNECTOR DISCONNECTED
Turn the ignition off.
Disconnect the Sun Sensor harness connector.
Turn the ignition on.
With the scan tool, erase HVAC DTCs.
Turn the ignition off, wait 10 seconds, and turn the ignition on.
With the scan tool, read HVAC DTCs.
Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Replace the Sun Sensor.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.

2. CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the A/C Heater Control (3 ZONE ATC) 32 way harness connector.
Measure the resistance of the (G139) Sun Sensor No. 2 Signal circuit between ground and the A/C Heater Control (3 ZONE ATC) 32 way harness connector.
Is the resistance below 10k ohms?

Yes

- Repair the (G139) Sun Sensor No. 2 Signal circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.

No

- Go To 3

3. CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO (C121) SUN SENSOR RETURN CIRCUIT
Measure the resistance between the (G139) Sun Sensor No. 2 Signal circuit and the (C121) Sensor Ground circuit in the A/C Heater Control (3 ZONE ATC) 32 way harness connector.
Is the resistance below 10k ohms?

Yes

- Repair the (G139) Sun Sensor No. 2 Signal circuit for a short to the (C121) Sensor Ground circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.

No

- Replace the A/C Heater Control.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.