B1605

B1605-RIGHT SOLAR SENSOR CIRCUIT HIGH (ATC)

B1605-Right Solar Sensor Circuit High (ATC):

WHEN MONITORED
Following the Start Up Wait Time after ignition on.

SET CONDITION
If the Right Sunload Sensor input is out of range toward the high voltage threshold.

POSSIBLE CAUSES
- (G139) sun sensor NO. 2 signal circuit open
- (G139) sun sensor NO. 2 signal circuit shorted to voltage
- (G939) sun sensor return circuit open
- Sun sensor
- A/C heater control

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. HVAC System Test (ATC)

DIAGNOSTIC TEST

1. CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT VOLTAGE




Turn the ignition off.
Disconnect the Sun Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (G139) Sun Sensor No. 2 Signal circuit.

Q: What voltage is present?

Above 5.2 volts
Go To 2
4.8 volts to 5.2 volts
Go To 3
Below 4.8 volts
Go To 5

2. CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE




Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
Measure the voltage of the (G139) Sun Sensor No. 2 Signal circuit.

Q: Is the voltage above 0.2 volts?

YES: Repair the (G139) Sun Sensor No. 2 Signal circuit for a short to voltage. 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

3. CHECK (G939) SUN SENSOR RETURN CIRCUIT FUNCTION




Turn the ignition off.
Connect a jumper wire between the (G139) Sun Sensor No. 2 Signal circuit and the (G939) Sun Sensor Return circuit in the Sun Sensor harness connector.
Turn the ignition on.
With the scan tool in HVAC, select Data Display and read the Right Solar Sensor voltage.

Q: Is the voltage below 0.2 volts?

YES: Replace the Sun Sensor. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4

4. CHECK (G939) SUN SENSOR RETURN CIRCUIT FOR AN OPEN




Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance of the (G939) Sun Sensor Return circuit between the Sun Sensor harness connector and the A/C Heater Control C1 harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Replace the A/C Heater Control. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (G939) Sun Sensor Return circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT FOR AN OPEN




Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance of the (G139) Sun Sensor No. 2 Signal circuit between the Sun Sensor harness connector and the A/C Heater Control C1 harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Replace the A/C Heater Control. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (G139) Sun Sensor No. 2 Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test