Toyota Yaris: Can Communication System / Air Conditioning Amplifier Communication Stop Mode
DESCRIPTION
Detection Item | Symptom | Trouble Area |
Air Conditioning Amplifier Communication Stop Mode | Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the GTS. Click here
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Air conditioning amplifier assembly branch line or connector
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Power source circuit of air conditioning amplifier assembly
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Air conditioning amplifier assembly ground circuit
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Air conditioning amplifier assembly
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
-
Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
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When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH LINE) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the air conditioning amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | H24-2 (CANH) - H24-1 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 54 to 69 Ω | |
| *a | Front view of wire harness connector (to Air Conditioning Amplifier Assembly) | | |
NG |
| REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY) |
OK |
| |
2. | CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | H24-17 (GND) - Body ground | Cable disconnected from negative (-) auxiliary battery terminal | Below 1 Ω | |
| *a | Front view of wire harness connector (to Air Conditioning Amplifier Assembly) | | |
(b) Reconnect the cable to the negative (-) auxiliary battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
H24-5 (B) - Body ground | Ignition switch off | 11 to 14 V |
H24-6 (IG+) - Body ground | Ignition switch ON | 11 to 14 V |
OK |
| REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
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Categories
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is
dangerous.
The person in the luggage compartment/trunk could be seriously injured or
killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open
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