B1E98-11

B1E98-11-PASSENGER ELECTROCHROMATIC CONTROL CIRCUIT - CIRCUIT SHORT TO GROUND





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

Theory of Operation

The driver electrochromatic mirror is controlled by the Body Control Module (BCM). The BCM receives the dimming control from the sensor in the Interior Rearview Mirror. The BCM send a Bus message to the Passenger Door Module (DDM) which turns the dimming on and off. At night the dimming will be cancelled when the vehicle is in reverse.

- When Monitored:
.

- Set Condition:
Whenever the Body Control Module sends a command to the Door Module to turn the Day/Night dimming on and the (P137) Passenger Auto Day/Night Mirror Signal circuit is shorted low, this code will set.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Block the Light Sensor in the Interior Rearview Mirror.
4. Shift the transmission to Drive (engine not running)
5. Wait two minutes.
6. With the scan tool, read the active DTCs.

Does the scan tool display; B1E98-11-PASSENGER ELECTROCHROMATIC CONTROL CIRCUIT - CIRCUIT SHORT TO GROUND as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (P137 ) PASSENGER AUTO DAY/NIGHT MIRROR SIGNAL CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Passenger Outside Rearview Mirror (C1) harness connector.
3. Measure the resistance between ground and the (P137) Passenger Auto Day/Night Mirror Signal.

Is the resistance below 20K Ohms?

Yes

- Repair the short to ground in the (P137) Passenger Auto Day/Night Mirror Signal circuit. If the harness appears good, replace the Mirror. Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. (P137 ) PASSENGER AUTO DAY/NIGHT MIRROR SIGNAL CIRCUIT SHORTED TO THE (P138) PASSENGER AUTO DAY/NIGHT MIRROR RETURN CIRCUIT




1. Measure the resistance between the (P137) Passenger Auto Day/Night Mirror Signal circuit and the (P138) Passenger Auto Day/Night Mirror Return circuit.

Is the resistance below 5.0 Ohms?

Yes

- Repair the short between the (P137) Passenger Auto Day/Night Mirror Signal circuit and the (P138) Passenger Auto Day/Night Mirror Return circuit. If the harness appears good, replace the Mirror. Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (P137 ) PASSENGER AUTO DAY/NIGHT MIRROR SIGNAL CIRCUIT SHORTED TO A GROUND OR RETURN CIRCUIT




1. Measure the resistance between the (P137) Passenger Auto Day/Night Mirror Signal circuit (C1-4) and all designated Ground and Return circuits.

Is the resistance below 20K Ohms in any measurement?

Yes

- Repair the short between the (P137) Passenger Auto Day/Night Mirror Signal circuit and the Ground or Return circuit. If the harness appears good, replace the Mirror. Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Passenger Door Module. Door Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.