- Air conditioning harness
- No. 2 air conditioning harness
- Air conditioning amplifier
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Vehicle Interior | Section: Heating/Air Conditioning | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002VXP004X |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
B1497/97 |
BUS IC Communication Malfunction |
DESCRIPTION
The air conditioning harness connects the air conditioning amplifier and each servo motor. The air conditioning amplifier supplies power and sends operation instructions to each servo motor through the air conditioning harness. Each servo motor sends the damper position information to the air conditioning amplifier.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1497/97 |
Communication line error or open |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK AIR CONDITIONING SYSTEM CONTROL |
(a) Check that the air conditioning system control.
OK:
Air conditioning system control is normal.
Result
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Front and rear air conditioning system control is malfunction) |
B |
|
NG (Front air conditioning system control is malfunction) |
C |
|
NG (Rear air conditioning system control is malfunction) |
D |
|
|
2. |
CHECK FOR DTC |
(a) Clear the DTC
.
(b) Check for DTC
.
OK:
DTC is not output.
|
|
3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND) |
|
(a) Disconnect the H24 air conditioning amplifier connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H24-14 (GND) - Body ground |
Always |
Below 1 Ω |
|
|
4. |
INSPECT AIR CONDITIONING AMPLIFIER |
|
(a) Reconnect the H24 air conditioning amplifier connector. |
(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H24-14 (GND) - z13-2 (BUS G) |
Always |
Below 1 Ω |
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
z13-4 (B BUS) - z13-2 (BUS G) |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
|
|
5. |
REPAIR OR REPLACE AIR CONDITIONING HARNESS |
(a) Repair or replace the air conditioning harness
.
|
|
6. |
CHECK FOR DTC |
(a) Clear the DTC
.
(b) Check for DTC
.
OK:
DTC is not output.
|
|
7. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND) |
|
(a) Disconnect the H67 air conditioning amplifier connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H67-20 (RGND) - Body ground |
Always |
Below 1 Ω |
|
|
8. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING HARNESS) |
|
(a) Disconnect the P9 rear air conditioning harness connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P9-2 (RBUG) - H67-21 (RBUG) |
Always |
Below 1 Ω |
|
P9-3 (RBUS) - H67-1 (RBUS) |
Always |
Below 1 Ω |
|
P9-4 (RBBU) - H67-23 (RBBU) |
Always |
Below 1 Ω |
|
H67-21 (RBUG) - Body ground |
Always |
10 KΩ or higher |
|
H67-1 (RBUS) - Body ground |
Always |
10 KΩ or higher |
|
H67-23 (RBBU) - Body ground |
Always |
10 KΩ or higher |
(c) Reconnect the air conditioning amplifier connector.
(d) Reconnect the rear air conditioning harness connector.
|
|
9. |
CHECK AIR CONDITIONING AMPLIFIER |
|
(a) Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance:
Standard Voltage:
|
|
|
10. |
REPAIR OR REPLACE NO.2 AIR CONDITIONING HARNESS |
(a) Repair or replace the No. 2 air conditioning harness
.
|
|
11. |
CHECK FOR DTC |
(a) Clear the DTC
.
(b) Check for DTC
.
OK:
DTC is not output.
|
|
|