Nissan Murano: Dtc/circuit Diagnosis / C1a21 Unit High Temp
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms | DTC detection condition | |
|---|---|---|---|
| C1A21–48 |
UNIT HIGH TEMP (Unit high temperature) |
Diagnosis condition | When Ignition switch is ON. |
| Signal (terminal) | — | ||
| Threshold | Temperature around distance sensor (ICC sensor) is high. | ||
| Diagnosis delay time | — | ||
POSSIBLE CAUSE
-
Temperature around the distance sensor (ICC sensor) becomes extremely high.
FAIL-SAFE
The following systems are canceled:
-
Intelligent Cruise Control
-
Automatic Emergency Braking (AEB)
-
Intelligent Forward Collision Warning (I-FCW)
PERFORM DTC CONFIRMATION PROCEDURE
CONSULT
-
Turn the ignition switch OFF.
-
Wait for 10 minutes or more.
-
Start the engine.
-
Turn the MAIN switch of ICC system ON.
-
Perform “All DTC Reading” with CONSULT.
-
Check if the “C1A21–48” is detected as the current malfunction in “Self Diagnostic Result” mode of “LASER/RADAR”.
Is “C1A21–48” detected as the current malfunction?
YES>>Refer to Diagnosis Procedure.
NO>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>Confirmation after repair: Inspection End.
CHECK ENGINE COOLING SYSTEM
Check for any malfunctions in engine cooling system.
Is engine cooling system normal?
YES>>Replace the distance sensor (ICC sensor). Refer to Removal and Installation.
NO>>Repair engine cooling system.
C1a18 Radar Aiming Incmp
DTC Description
DTC DETECTION LOGIC DTC No. CONSULT screen terms DTC detection condition
C1A18–54
LASER AIMING INCMP
Diagnosis condition
When Ignition switch is ON...
C1a23 Unit Low Temp
DTC Description
DTC DETECTION LOGIC DTC Trouble diagnosis name DTC detecting condition
C1A23
(97)
UNIT LOW TEMP
Temperature detected by the temperature sensor integrated in distance sensor (ICC sensor) remains less than -40 °C for 5 seconds or more
POSSIBLE CAUSETemperature around the distance sensor (ICC sensor) becomes extremely lowFAIL-SAFEThe following systems are canceled...
Other information:
Nissan Murano (Z52) 2015-2024 Service Manual: Warning Function
System Description OPERATION DESCRIPTIONThe warning functions are as per the following items and are given to the user as warning information and warnings using combinations of Intelligent Key warning buzzer, combination meter buzzer, KEY warning lamp and information display in combination meter: Intelligent Key system malfunction OFF position warning P position warning Take away warning Door lock operation warning Engine start information Intelligent Key low battery warning Key ID warning Key ID verification information OPERATION CONDITIONOnce the following condition from below is established, alert or warning is executed: Warning/Information functions Operation procedure Intelligent Key system malfunction When a malfunction is detected on BCM, “KEY” warning lamp illuminates...
Nissan Murano (Z52) 2015-2024 Service Manual: Remote Keyless Entry Receiver
Component Function Check CHECK FUNCTION CONSULT Select “RKE OPE COUN1” in “Data Monitor” mode of “BCM(INTELLIGENT KEY)”. Check that the function operates normally according to the following conditions: Monitor Item Condition RKE OPE COUN1 Checks whether value changes when operating Intelligent Key...
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Fuel gauge
The gauge indicates the approximate fuel level in the tank.
The gauge may move slightly during braking, turning, acceleration, or going up or down hills.
The gauge needle returns to 0 (Empty) after the ignition switch is placed in the OFF position.
