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DTC B10C0: Interior temperature sensor SHT
DTC B10C1: Interior temperature sensor open
 
 
 
 
DTC SET CONDITION
These codes are set when the interior temperature sensor circuit is short (DTC B10C0) or is open (DTC 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.-IIISE), check the data list.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the electric motor switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect Scan Tool (M.U.T.-IIISE) ".
(2) Check that the following data list 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. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.
(1) Erase the DTC.
(2) Electric motor switch: OFF to ON
(3) Check the DTC.
Is the DTC set?
Replace the heater controller assembly (A/C-ECU) (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).