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DTC B10C0: Interior temperature sensor system (short circuit)
DTC B10C1: Interior temperature sensor system (open circuit)
 
 
 
 
DTC SET CONDITION
This code is set when the interior temperature sensor circuit is short (Code No.B10C0) or is open (Code No.B10C1)
 
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the interior temperature sensor
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  • Malfunction of the heater controller assembly (A/C-ECU)
 
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Using scan tool (M.U.T.-III), check data list.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(2) Check that the following service data display contents are normal. (Refer to ).
Item No.21: Interior temperature sensor
Is the check result normal?
Go to Step 4.
Go to Step 2.
 
STEP 2. Check of open and short circuit in SENG and INC line between interior temperature sensor and heater controller assembly (A/C-ECU) connector.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. Check the interior temperature sensor.
Refer to .
Is the check result normal?
Go to Step 4.
Replace the interior temperature sensor (Refer to ).
 
STEP 4. Check whether the DTC is set again.
Is the DTC set?
Replace the heater controller assembly (A/C-ECU).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).