Diagnosis Procedure

Diagnosis Procedure

1. CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE

   1. 1. Ignition switch OFF.

      2. Disconnect combination switch connector.

      3. Check resistance between the terminals of combination switch connector.

      Combination switch			Condition	Resistance Ω (Approx.)
      Connector	Terminal	Terminal
      M96	27	25	Depress BACK switch.	1
      			Depress switch.	52
      			Depress switch.	134
      			Depress OK switch.	264
      			Depress DISPLAY BACK switch.	654
      			Depress DISPLAY FWD switch.	2126
      	23		Depress switch.	1
      			Depress switch.	52
      			Depress switch.	134
      			Depress switch.	264
      			Depress SEEK DOWN switch.	654
      			Depress SEEK UP switch.	2126

   Is the inspection result normal?

   YES>>

   GO TO 2.

   NO>>

   Replace steering switches. Refer to Removal and Installation.

2. CHECK HARNESS BETWEEN COMBINATION METER AND COMBINATION SWITCH

   1. 1. Disconnect combination meter connector and combination switch connector.

      2. Check continuity between combination meter connector and combination switch connector .

         Combination meter		Combination switch		Continuity
         Connector	Terminal	Connector	Terminal
         M24	23	M30	9	Yes
         	33		13
         	34		11

      3. Check continuity between combination meter connector and ground.

         Combination meter		—	Continuity
         Connector	Terminal
         M24	23	Ground	No
         	33
         	34

   Is the inspection result normal?

   YES>>

   GO TO 3.

   NO>>

   Repair or replace harness or connectors.

3. CHECK COMBINATION SWITCH

   1. Check continuity between combination switch connectors.

      Combination switch				Continuity
      Connector	Terminal	Connector	Terminal
      M96	23	M30	9	Yes
      	25		11
      	27		13

   Is the inspection result normal?

   YES>>

   GO TO 4.

   NO>>

   Replace spiral cable. Refer to Removal and Installation.

4. CHECK HARNESS BETWEEN COMBINATION METER AND AV CONTROL UNIT

   1. 1. Disconnect combination meter connector and AV control unit connector.

      2. Check continuity between combination meter connector and AV control unit connector.

         Combination meter		AV control unit		Continuity
         Connector	Terminal	Connector	Terminal
         M24	39	M104	58	Yes
         			59
         	40		38
         			39

      3. Check continuity between combination meter connector and ground.

         Combination meter		—	Continuity
         Connector	Terminal
         M24	39	Ground	No
         	40

   Is the inspection result normal?

   YES>>

   Replace AV control unit. Refer to Removal and Installation.

   NO>>

   Repair or replace harness or connectors.