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DLN-294 < DTC/CIRCUIT DIAGNOSIS > [REAR FINAL DRIVE: M226 (ELD) ] LOCK INDICATOR LAMP LOCK INDICATOR LAMP Description INFOID:0000000009479855 The DIFF LOCK indicator lamp has power available to it any time the ignition switch is in the ON or START position. The differential lock control unit supplies ground to activate the DIFF LOCK indicator lamp. The DIFF LOCK indicator lamp will go through a prove out at initial key ON. The DIFF LOCK will flash while the differen- tial lock system is activating or while waiting for conditions to be met to activate. Once the differential lock has been engaged, the DIFF LOCK indicator lamp will remain ON. For more information about the DIFF LOCK indicator lamp, refer to the Owner’s Manual. Component Function Check INFOID:0000000009479856 1. CHECK DIFF LOCK INDICATOR LAMP OPERATION 1. Turn the ignition switch ON. 2. Observe the DIFF LOCK indicator lamp. Does the DIFF LOCK indicator lamp prove out normally? YES >> DIFF LOCK indicator lamp is operating normally. NO, ALWAYS ON>> Perform self diagnostics on differential lock control unit. Refer to TIAL LOCK CONTROL UNIT : CONSULT Function (DIFF LOCK)" NO, ALWAYS OFF>>Check DIFF LOCK indicator lamp control circuit. Refer to . Diagnosis Procedure INFOID:0000000009479857 Regarding Wiring Diagram information, refer to 1. CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER AND GROUND SUPPLY Check the differential lock control unit power and ground supply. Refer to DLN-276, "Diagnosis Procedure" Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace malfunctioning component. 2. CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND COMBINATION METER 1. Turn ignition switch OFF. 2. Disconnect differential lock control unit harness connector and combination meter harness connector. 3. Check continuity between differential lock control unit harness connector M70 (A) terminal 21 and combination meter harness connector M24 (B) terminal 25. 4. Check continuity between differential lock control unit harness connector M70 (A) terminal 21 and ground. Is the inspection result normal? Ignition switch ON Indicator prove out A B Continuity Connector Terminal Connector Terminal M70 21 M24 25 Yes A — Continuity Connector Terminal M70 21 Ground No AWDIA0312ZZ |