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HOMESERVICE MANUALSTOYOTA20254RUNNER SR5, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOLLISION/AVOIDANCEINTUITIVE PARKING ASSIST SYSTEM - DIAGNOSTIC CODES, CIRCUIT TESTS & SYMPTOM TESTSINTUITIVE PARKING ASSIST SYSTEMDTC U1177-87: LOST COMMUNICATION WITH SIDE OBSTACLE DETECTION CONTROL MODULE "A" (CH2) MISSING MESSAGE; DTC U1178-87: LOST COMMUNICATION WITH SIDE OBSTACLE DETECTION CONTROL MODULE "B" (CH2) MISSING MESSAGE [12/2024 - ]DESCRIPTION
2025 Toyota 4Runner SR5, 4WD

DTC U1177-87: Lost Communication with Side Obstacle Detection Control Module "A" (ch2) Missing Message; DTC U1178-87: Lost Communication with Side Obstacle Detection Control Module "B" (ch2) Missing Message [12/2024 - ]: Description

2025 Toyota 4Runner SR5, 4WDSECTION Description

This DTC is output when the clearance warning ECU assembly detects lost communication with the blind spot monitor sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U1177-87 Lost Communication with Side Obstacle Detection Control Module "A" (ch2) Missing Message The clearance warning ECU assembly is unable to receive communication from the blind spot monitor sensor (A)
  • Open or short in bus main line
  • Open or short in bus branch line
  • Open or short in wire harness connector (No. 2 CAN junction connector)
  • Clearance warning ECU assembly internal malfunction
  • Blind spot monitor sensor (A) internal malfunction
  • Blind spot monitor sensor (A) power source circuit malfunction
  • Blind spot monitor sensor (B) internal malfunction
 Clearance Warning B
U1178-87 Lost Communication with Side Obstacle Detection Control Module "B" (ch2) Missing Message The clearance warning ECU assembly is unable to receive communication from the blind spot monitor sensor (B)
  • Open or short in bus main line
  • Open or short in bus branch line
  • Open or short in wire harness connector (No. 2 CAN junction connector)
  • Clearance warning ECU assembly internal malfunction
  • Blind spot monitor sensor (B) internal malfunction
  • Blind spot monitor sensor (B) power source circuit malfunction
  • Blind spot monitor sensor (A) internal malfunction
 Clearance Warning B
RENDER: 1.0x

NO RELATED

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