Subaru Legacy BN/BS (2015-2019) Service Manual: Diagnostic procedure with diagnostic trouble code (dtc)

Subaru Legacy BN/BS (2015-2019) Service Manual / Keyless access with push button start system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc)

Dtc u0073 control module communication bus off
Dtc u0100 lost communication with ecm/pcm "a"
Dtc u0422 invalid data received from body control module
Dtc u0401 invalid data received from ecm/pcm "a"
Dtc u0155 lost communication with instrument panel cluster (ipc) control module
Dtc b2793 back up power
Dtc b1571 reference code incompatibility (immobilizer cm to ecm)
Dtc b1577 imm control module eeprom
Dtc b1576 egi control module eeprom
Dtc b1572 imm circuit except antenna circuit
Dtc b27a8 trunk/rear gate external antenna open
Dtc b27a7 trunk/rear gate internal antenna open
Dtc b27a6 rear internal antenna open
Dtc b27a5 front internal antenna open
Dtc b27a2 passenger side external antenna open
Dtc b27a1 driver side external antenna open
Dtc b278d id code box judgment circuit
Dtc b278a push engine switch power supply circuit
Dtc b2790 id code box circuit
Dtc b2789 id code box communication
Dtc b2788 ign signal correlation (steering lock cm)
Dtc b2786 steering lock cm communication
Dtc b2785 lin communication
Dtc b2784 antenna circuit (push engine switch)
Dtc b2782 steering lock drive request signal correlation
Dtc b2781 steering lock cm control circuit
Dtc b2779 remote control engine starter collation
Dtc b2286 engine speed signal(without auto start stop)
Dtc b2285 steering lock position signal correlation
Dtc b2284 brake signal correlation
Dtc b2283 vehicle speed sensor
Dtc b2282 vehicle speed signal correlation
Dtc b2277 submerging circuit
Dtc u0140 lost communication with body control module
Dtc u0122 lost communication with vehicle dynamics control module
Dtc b2276 acc relay off signal
Dtc b2275 engine start request control circuit
Dtc b2274 acc relay control circuit
Dtc b2271 ign relay control circuit
Dtc u0101 lost communication with tcm

Electrical specification

1. KEYLESS ACCESS CMTerminal No.ContentsMeasuring conditionStandard(i75) No. 1 ←> Chassis groundGroundAlways *1Less than 1 -(i75) No. 2 ←> 1Immobilizer signal reception (ignition switch)Wait ...

Dtc u0073 control module communication bus off

Detected when CAN line abnormality is detected.NOTE:Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE ...

Other materials:

Disassembly
1. REVERSE IDLER GEAR ASSY1. Remove the snap ring and friction plate.(A)Friction plate(B)Snap ring2. Remove the reverse idler sub gear and reverse idler spring.(A)Reverse idler sub gear(B)Reverse idler spring(C)Reverse idler gear ...