Ambient Temperature Display System [11/2022 - ]: Procedure

1. Check for DTCs.

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   P0070-11 and P0070-15 are not output	A
   P0070-11 is output	B
   P0070-15 is output	C

Result: 

B 

GO TO DTC P0070-11 

Refer to DTC P0070-11: Ambient Temperature Sensor Circuit Short to Ground [11/2022 - ] 

Result: 

C 

GO TO DTC P0070-15 

Refer to DTC P0070-15: Ambient Temperature Sensor Circuit Short to Battery or Open [11/2022 - ] 

Result: 

A 

See step  2

Refer to INSPECTION [09/2021 - ]

Result

Result: 

NG 

REPLACE THERMISTOR ASSEMBLY 

Refer to REMOVAL [11/2022 - ]

Result: 

OK 

See step  3

1. Disconnect the I48 air conditioning amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A3-1 - I48-1 (TAM)	Always	Below 1 Ω
   A3-2 - I48-14 (SG-2)	Always	Below 1 Ω
   A3-1 or I48-1 (TAM) - Other terminals and body ground	Always	10 kΩ or higher
   A3-2 or I48-14 (SG-2) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for at least 90 seconds.
   NOTE:

   Make sure the wire harness(es) and connector(s) for the vehicle being inspected are connected. After the ignition switch is turned off, the navigation system stores the various memory and settings within approximately 6 minutes. Therefore, make sure to disconnect the cable from the negative (-) auxiliary battery terminal after confirming that 6 minutes or more have elapsed since turning the ignition switch off.

   HINT: 

   The air conditioning amplifier assembly reads and memorizes the thermistor assembly (ambient temperature sensor) detection value (THO) from before the ignition switch was turned off for 1 hour after turning the ignition switch off. Therefore, it is necessary to switch off the air conditioning amplifier assembly internal power source and clear the stored values from before the ignition switch was turned off.

2. Connect the cable to the negative (-) auxiliary battery terminal.
3. Measure and make a note of the ambient temperature near the thermistor assembly using a thermometer.
   NOTE:

   • Perform the following procedure with the ignition switch ON.
   • Wait at least 6 minutes for the values of the thermistor assembly and thermometer to become stable before taking a measurement.
   • Hold the thermometer 50 mm (1.97 in.) from the thermistor assembly with its sensing portion at the same height and perpendicular to the thermistor assembly.
   • Hold the sensor only by its connector. Touching the sensing portion may change the resistance value.
   • When measuring the ambient temperature with a thermometer, do not move the thermometer, touch the sensing portion or allow it to contact the vehicle body.
4. Make a note of the ambient temperature displayed on the multi-information display in the combination meter assembly.
5. Compare the value of the ambient temperature measured by the thermometer and the thermistor assembly.

   OK

   The value of the ambient temperature measured by the thermometer and the thermistor assembly are almost the same.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

Refer to REMOVAL [11/2022 - ]