B1497/97

DESCRIPTION

The air conditioning harness connects the air conditioning amplifier and each servo. The air conditioning amplifier supplies power and sends operation instructions to each servo through the air conditioning harness. Each servo sends the damper position information to the air conditioning amplifier.

DTC No.	DTC Detection Condition	Trouble Area
B1497/97	Communication line error or open	Air conditioning harness A/C amplifier

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR

1. Remove the A/C amplifier.

2. Disconnect the connector from the A/C amplifier.

3. Measure the resistance according to the value(s) in the table below.

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   J58-20 (GND) - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2. CHECK AIR CONDITIONING AMPLIFIER

1. Reconnect the connector to the A/C amplifier.

2. Measure the resistance according to the value(s) in the table below.

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   e1-2 (BUS G) - Body ground	Always	Below 1 Ω

NG	REPLACE AIR CONDITIONING AMPLIFIER

OK

3. CHECK AIR CONDITIONING AMPLIFIER

1. Measure the voltage according to the value(s) in the table below.

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   e1-4 (B BUS) - e1-2 (BUS G)	Engine switch off	Below 1 V
   e1-4 (B BUS) - e1-2 (BUS G)	Engine switch on (IG)	10 to 14 V

NG	REPLACE AIR CONDITIONING AMPLIFIER

OK
REPLACE AIR CONDITIONING HARNESS