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3 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors E15, F18
I Harness for open or short between ECM and refrigerant pressure sensor
© Repair harness or connectors.
4 CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between refrigerant pressure sensor terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors E8, F17
I Harness for open between ECM and refrigerant pressure sensor
I Harness for open between TCM (Transmission control module) and refrigerant pressure sensor
© Repair open circuit or short to power in harness or connectors.
6 CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 81 and refrigerant pressure sensor terminal 2. Refer to Wiring Dia-
gram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and refrigerant pressure sensor
© Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-15, “Refrigerant pressure sensor”.
OK or NG
OK © GO TO 9.
NG © Replace refrigerant pressure sensor.
9 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-156.
© INSPECTION END
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REFRIGERANT PRESSURE SENSOR
Diagnostic Procedure (Cont’d)
EC-727
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