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Inspection Procedure B-3: Liftgate lock release handle signal is not received.
 
 
cautionBefore replacing the ECU, ensure that the input and output signal circuits are normal.
 
 
 
 
COMMENTS ON TROUBLE SYMPTOM
The wiring harness or its connector(s) between the liftgate lock release handle and the power liftgate control unit, the liftgate lock release handle itself or the power liftgate control unit itself may be defective.
 
 
PROBABLE CAUSES
  • Damaged liftgate lock release handle
  • Damaged power liftgate control unit
  • Damaged wiring harness and connectors
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Liftgate lock release handle check.
Check the liftgate lock release handle (refer to ).
Is the check result normal?
Go to Step 2.
Replace the liftgate lock release handle.
 
STEP 2. Resistance measurement at liftgate lock release handle connector (ground line terminal).
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between liftgate lock release handle connector (ground line terminal) and body ground.
OK: Continuity exists (2 Ω or less).
Is the check result normal?
Go to Step 4.
Go to Step 3.
 
STEP 3. Check of open circuit in ground line between liftgate lock release handle connector and body ground.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
Repair the connector(s) or wiring harness.
 
STEP 4. Check of open circuit in GOPN line between power liftgate control unit connector and liftgate lock release handle connector.
Is the check result normal?
Go to Step 5.
Repair the connector(s) or wiring harness.
 
STEP 5. Check of the troubles
Check that the liftgate lock release handle signal is received normally.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
Replace the power liftgate control unit.