Subaru Crosstrek Service Manual: Dtc b1577 imm control module eeprom
KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1577 IMM CONTROL MODULE EEPROM
1. EXCEPT FOR C0 AND C5 MODELS
DTC detecting condition:
• Defective keyless access CM
• When inaccessible to ROM in keyless access CM.
| STEP | CHECK | YES | NO |
1.CHECK DTC.
1) Turn the ignition switch to ON.
2) Perform the clear memory operation of ECM. Clear Memory Mode">
3) Turn the ignition switch to OFF.
4) Remove and install the battery.
5) Turn the ignition switch to ON.
6) After 5 seconds or more, read DTC. Read Diagnostic Trouble Code (DTC)">
Is DTC B1577 displayed?
Replace the keyless access CM. Keyless Access CM">
Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2. FOR C0 AND C5 MODELS
DTC detecting condition:
• ID code box malfunction
• When inaccessible to ROM in ID code box.
| STEP | CHECK | YES | NO |
1.CHECK DTC.
1) Turn the ignition switch to ON.
2) Perform the clear memory operation of ECM. Clear Memory Mode">
3) Turn the ignition switch to OFF.
4) Register the ID code box.
5) Read the DTC again. Read Diagnostic Trouble Code (DTC)">
Is DTC B1577 displayed?
Replace the ID code box. ID Code Box">
Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
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Other materials:
Towing with all wheels on the ground
1. Release the parking brake and put the
transmission in the "N" position.
2. The ignition switch should be in the
"ON" position while the vehicle is being
towed.
3. Take up slack in the towline slowly to
prevent damage to the vehicle.
WARNING
Never turn the ignition switch to
t ...
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