3. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - ECM)
(a) Disconnect the F53 ECU connector.
(b) Disconnect the A43 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and
Repair/Removal
Up to 08/2009
HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1497/97: BUS IC Communication Malfunction
B1497/97 - BUS IC Communication Malfunction
DESCRIPTION
The air conditioning harness connects the A/C amplifier and each servo. The A/C amplifier supplies power and sends operation instructions to each
servo through the air conditioning harness. Each servo sends the damper position information to the A/C amplifier.
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