Inspection Procedure

1. Connect the Techstream to the DLC3
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Expose the sensing portion of the solar sensor to light
5. Select the item below in the Data List, and read the display on the Techstream.

   Data List / Air Conditioner 

   DATA LIST / AIR CONDITIONER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Cool Air Bypass Pulse (MB Damp Pis)	Passenger side cool air by-pass pulse / Min 0, Max 255	CLOSE 50 (pulse) OPEN 8 (pulse)	-

   OK: The display is as specified in the normal condition column. 

   Result 

   RESULT DESCRIPTION
   
   

   Result	Proceed to
   NG	A
   OK (When troubleshooting according to the Problem Symptoms Table)	B
   OK (When troubleshooting according to the DTC)	C

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

C: REPLACE A/C AMPLIFIER  (See REMOVAL  )

A: Go to next step 

1. Replace the cool air by-pass control servo motor (See DISASSEMBLY  )

   HINT

   Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a known good one and check that the condition returns to normal

2. Check for the DTC

   Result 

   RESULT DESCRIPTION
   
   

   Result	Proceed to
   DTC B1445/45 is output	A
   DTC B1445/45 is not output	B

B: REPLACE COOL AIR BY-PASS CONTROL SERVO MOTOR  (See DISASSEMBLY  )

A: Go to next step 

1. Replace the air conditioning harness (See DISASSEMBLY  )

   HINT:

   Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a known good one and check that the condition returns to normal.

2. Check for the DTC

   Result 

   RESULT DESCRIPTION
   
   

   Result	Proceed to
   DTC B1445/45 is output	A
   DTC B1445/45 is not output	B

B: REPLACE AIR CONDITIONING HARNESS  (See DISASSEMBLY  )

A: REPLACE A/C AMPLIFIER  (See REMOVAL  )