hey how are you
most possible causes
1- Ambient sensor
2- a/c auto amp
3- harness & connector ambient sensor circuit is open or short in the circuit)
check connector you should have 5 v and a ground on both of these sensor connectors
follow steps to trouble shoot ,
B257B, B257C AMBIENT SENSOR DTC Logic DTC DETECTION LOGIC NOTE: - If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to "DTC Logic" See: A L L Diagnostic Trouble Codes ( DTC ) > U Code Charts > Climate Control. - If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. "DTC Logic" See: A L L Diagnostic Trouble Codes ( DTC ) > U Code Charts > Climate Control.
1. CHECK AMBIENT SENSOR 1.Turn ignition switch OFF. 2.Disconnect ambient sensor connector. 3.Check resistance between ambient sensor terminals.
Is the inspection result normal? YES- Inspection End. NO- Replace ambient sensor. Refer to "Removal and Installation" S
B2630, B2631 SUNLOAD SENSOR
Most possible cause
for DTC B2631
1- sunload sensor
2-a/c auto amp
3-harness & connector (sunload sensor circuit is open or there is a short in the circuit)
4. CHECK CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP. 1.Turn ignition switch OFF. 2.Disconnect A/C auto amp. connector. 3.Check continuity between sunload sensor harness connector M101 terminal 1 and A/C auto amp. harness connector M50 terminal 9.
4.Check continuity between sunload sensor harness connector M101 terminal 1 and ground.
Is the inspection result normal? YES- Replace A/C auto amp. Refer to "Removal and Installation" See: Control Module HVAC > Removal and Replacement > Removal and Installation. NO- Repair harness or connector.
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