Can Communication System Air Conditioning Amplifier Communication Stop Mode
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN BUS LINE FOR DISCONNECTION (AIR CONDITIONING AMPLIFIER BRANCH WIRE)
CHECK HARNESS AND CONNECTOR (IG+, GND)
CAN COMMUNICATION SYSTEM - Air Conditioning Amplifier Communication Stop Mode |
DESCRIPTION
Detection Item
| Symptom
| Trouble Area
|
Air Conditioning Amplifier Communication Stop Mode
| - "Air Conditioner" is not displayed on the "CAN Bus Check" screen of the Techstream
- Applies to "Air Conditioning Amplifier Communication Stop Mode" in "DTC Combination Table"
| - Power source circuit of the air conditioning amplifier
- Air conditioning amplifier branch wire or connector
- Air conditioning amplifier
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Turn the ignition switch off before measuring the resistance between main CAN bus wires and CAN Bus branch wires.
- After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
- Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check the connectors, open the doors and leave them open.
- HINT:
- Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
- Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
| 1.CHECK CAN BUS LINE FOR DISCONNECTION (AIR CONDITIONING AMPLIFIER BRANCH WIRE) |
Turn the ignition switch off.
Text in Illustration*A
| Auto Air Conditioning
|
*B
| Manual Air Conditioning, for 2ZR-FE
|
*C
| Manual Air Conditioning, for 2AZ-FE
|
*a
| Front view of wire harness connector
(to Air Conditioning Amplifier)
|
Disconnect the air conditioning amplifier connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- Automatic Air Conditioning:
Tester Connection
| Switch Condition
| Specified Condition
|
E30-11 (CANH) - E30-12 (CANL)
| Ignition switch off
| 54 to 69 Ω
|
- Manual Air Conditioning, for 2ZR-FE:
Tester Connection
| Switch Condition
| Specified Condition
|
E111-8 (CANH) - E111-9 (CANL)
| Ignition switch off
| 54 to 69 Ω
|
- Manual Air Conditioning, for 2AZ-FE:
Tester Connection
| Switch Condition
| Specified Condition
|
E62-2 (CANH) - E62-3 (CANL)
| Ignition switch off
| 54 to 69 Ω
|
| | REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (AIR CONDITIONING AMPLIFIER BRANCH WIRE) |
|
|
| 2.CHECK HARNESS AND CONNECTOR (IG+, GND) |
Disconnect the air conditioning amplifier connector.
Text in Illustration*A
| Auto Air Conditioning
|
*B
| Manual Air Conditioning, for 2ZR-FE
|
*C
| Manual Air Conditioning, for 2AZ-FE
|
*a
| Front view of wire harness connector
(to Air Conditioning Amplifier)
|
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- Automatic Air Conditioning:
Tester Connection
| Condition
| Specified Condition
|
E30-14 (GND) - Body ground
| Always
| Below 1 Ω
|
- Manual Air Conditioning:
Tester Connection
| Condition
| Specified Condition
|
E111-24 (GND) - Body ground*1
| Always
| Below 1 Ω
|
E62-12 (GND) - Body ground*2
| Always
| Below 1 Ω
|
- *1: for 2ZR-FE
- *2: for 2AZ-FE
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
- Automatic Air Conditioning:
Tester Connection
| Switch Condition
| Specified Condition
|
E30-1 (IG+) - Body ground
| Ignition switch ON
| 10 to 14 V
|
- Manual Air Conditioning:
Tester Connection
| Switch Condition
| Specified Condition
|
E111-14 (IG+) - Body ground*1
| Ignition switch ON
| 10 to 14 V
|
E62-8 (IG+) - Body ground*2
| Ignition switch ON
| 10 to 14 V
|
- *1: for 2ZR-FE
- *2: for 2AZ-FE
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
