TROUBLESHOOTING
U–75
U
NO.8 NO COOL AIR
A6E858001038W10
•
When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while
performing the inspection to discover whether poor contact points are the cause of any intermittent
malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are
connected correctly and undamaged.
Diagnostic procedure
8
No cool air
DESCRIPTION
•
Magnetic clutch does not operate.
POSSIBLE
CAUSE
•
Malfunction in PCM A/C cut control system (Step 3)
•
Malfunction in climate control unit (Step 4)
•
Malfunction in refrigerant pressure switch (Steps 5, 7—9)
•
Malfunction in PCM (A/C signal) (Step 6)
•
Malfunction in PCM (IG1 signal) (Steps 10, 11)
•
Malfunction in A/C compressor (Step 12)
•
Malfunction in A/C relay (Steps 13—15)
•
Malfunction in evaporator temperature sensor (Step 16)
STEP
INSPECTION
ACTION
1
INSPECT AIR BLOW OUT
•
Does air blow out?
Yes
Go to next step.
No
Go to Step 1 of troubleshooting indexes No.1 and 2.
2
INSPECT A/C COMPRESSOR OPERATION
•
Start engine.
•
Turn A/C switch and fan switch on.
•
Does A/C compressor operate?
Yes
Go to Step 1 of troubleshooting index No.7.
No
Go to next step.
3
INSPECT FOR DTC IN PCM
•
Inspect for DTCs related to the PCM on-
board diagnostic system.
•
Are any DTCs displayed?
Yes
Go to appropriate inspection procedure.
No
Go to next step.
4
INSPECT TO SEE WHETHER MALFUNCTION
IS IN CLIMATE CONTROL UNIT OR
ELSEWHERE
•
Does cool air blow out when terminal 1P of
climate control unit connector (24-pin, A/C
signal) is grounded?
Yes
Replace climate control unit, then go to Step 17.
No
Release short, then go to next step.
5*
INSPECT TO SEE WHETHER MALFUNCTION
IS IN A/C SIGNAL CIRCUIT (BETWEEN
REFRIGERANT PRESSURE SWITCH AND
PCM) OR ELSEWHERE
•
Test voltage at following terminal of
refrigerant pressure switch.
— Terminal B (A/C signal)
•
Is voltage
approximately 12 V
?
Yes
Go to Step 7.
No
Go to next step.
6*
INSPECT TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN WIRING
HARNESS (BETWEEN REFRIGERANT
PRESSURE SWITCH AND PCM) OR PCM
•
Test voltage at A/C signal terminal of PCM.
•
Is voltage
approximately 12 V
?
Yes
Repair wiring harness between PCM and refrigerant
pressure switch, then go to Step 17.
No
Inspect PCM, then go to Step 17.
7
INSPECT TO SEE WHETHER MALFUNCTION
IS IN REFRIGERANT PRESSURE SWITCH,
REFRIGERANT AMOUNT, OR ELSEWHERE
•
Does cool air blow out when terminals A and
B of refrigerant pressure switch connector
are shorted?
Yes
Go to Step 9.
No
Go to next step.
8*
INSPECT TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (BETWEEN
REFRIGERANT PRESSURE SWITCH AND
CLIMATE CONTROL UNIT) OR ELSEWHERE
•
Test voltage at following terminal of climate
control unit.
— Terminal 1P (24-pin, A/C signal)
•
Is voltage
approximately 12 V
?
Yes
Go to Step 10.
No
Repair wiring harness between refrigerant pressure switch
and climate control unit, then go to Step 17.
Содержание 6 2002
Страница 104: ...F 4 LOCATION INDEX End Of Sie FUEL SYSTEM A6E390001006W01 Engine Room Side A6E3912W015...
Страница 151: ...F 36 EXHAUST SYSTEM A6E3914W002...
Страница 312: ...F 182 TROUBLESHOOTING QUICK DIAGNOSTIC CHART A6E398018881W02 A6E3980W001...
Страница 313: ...TROUBLESHOOTING F 183 F A6E3980W002...
Страница 314: ...F 184 TROUBLESHOOTING A6E3980W003...
Страница 315: ...TROUBLESHOOTING F 185 F End Of Sie A6E3980W004...
Страница 410: ...K 3 K...
Страница 411: ...K 4 LOCATION INDEX AUTOMATIC TRANSAXLE LOCATION INDEX A6E560001074W01 LOCATION INDEX A6E5600W001...
Страница 526: ...TROUBLESHOOTING K 115 K QUICK DIAGNOSIS CHART A6E568001030W04 A6E5680W001...
Страница 527: ...K 116 TROUBLESHOOTING End Of Sie A6E5680W002...
Страница 653: ...ON BOARD DIAGNOSTIC ABS TCS P 57 P...
Страница 701: ...TROUBLESHOOTING ABS TCS DYNAMIC STABILITY CONTROL P 105 P Vehicle with ABS TCS A6E6980W002...
Страница 702: ...P 106 TROUBLESHOOTING ABS TCS DYNAMIC STABILITY CONTROL Vehicle with DSC End Of Sie A6E6980W100...
Страница 819: ...OUTSIDE MIRROR S 60 2 THIS PAGE IS INTENTIONALLY LEFT BLANK End Of Sie...
Страница 971: ...T 76 WARNING AND INDICATOR SYSTEM Operating Order A6E8118W009...
Страница 1150: ...U 4 LOCATION INDEX End Of Sie CONTROL SYSTEM A6E850001042W01 L H D A6E8500W003 A6E8500W004...
Страница 1152: ...U 6 LOCATION INDEX R H D A6E8500W005 A6E8500W006...
Страница 1177: ...U 26 BASIC SYSTEM 12 Perform the refrigerant system performance test See U 13 REFRIGERANT SYSTEM PERFORMANCE TEST A6E8516W029...