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INSPECT BACK DOOR KEY UNLOCK SWITCH OPERATION
Is there continuity between terminal 1 and body ground with back door key unlock switch turned on?
No → Inspect back door key unlock switch.
Yes ↓
COMPUTER
Disconnect computer and inspect connector on wire harness side as follows.
↓
INSPECT POWER SOURCE
Is there battery voltage between terminal 5 and body ground?
No → Open circuit in wire harness between fuse and terminal 5 of computer.
Yes ↓
INSPECT GROUND CONNECTION
Is there continuity between terminal 10 and body ground?
No → • Open circuit in wire harness between terminal 10 of computer and body ground.
• Body ground faulty.
Yes ↓
INSPECT LH KEY UNLOCK SWITCH CIRCUIT
Is there continuity between terminal 9 and body ground with LH door locked with key?
Yes → Short circuit in wire harness between terminal 9 of computer and terminal 2 of LH key unlock switch.
No ↓
INSPECT RH KEY UNLOCK SWITCH CIRCUIT
Is there continuity between terminal 9 and body ground with RH door locked with key?
Yes → Short circuit in wire harness between terminal 9 of computer and terminal 2 of RH key unlock switch.
No ↓
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