DTC indicator light E: An Open in the Sunlight Sensor Circuit

WARNING: This page is about a different car, the 2003 Acura 3.2CL and 2002 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the sunlight sensor 2P connector.
Disconnect climate control unit connector B (20P).
Check for continuity between the No. 2 terminal of climate control unit connector B (20P) and the No. 1 terminal of the sunlight sensor 2P connector.

Fig 1: Checking Continuity Between The No. 2 Terminal Of Climate Control Unit Connector B (20P) And The No. 1 Terminal Of The Sunlight Sensor 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity ?
1. YES : Go to step 4.
2. NO : Repair open in the wire between the climate control unit and the sunlight sensor.
Check for continuity between the No. 15 terminal of climate control unit connector B (20P) and the No. 2 terminal of the sunlight sensor 2P connector.

Fig 2: Checking Continuity Between The No. 15 Terminal Of Climate Control Unit Connector B (20P) And The No. 2 Terminal Of The Sunlight Sensor 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity ?
1. YES : Go to step 5.
2. NO : Repair open in the wire between the climate control unit and the sunlight sensor.
Reconnect the sunlight sensor 2P connector.
Reconnect climate control unit connector B (20P).
Test the sunlight sensor (see SUNLIGHT SENSOR TEST ).
Is the sunlight sensor OK ?
1. YES : Check for loose wires or poor connections at climate control unit connector B (20P) and at the sunlight sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.
2. NO : Replace the sunlight sensor.