Dtc P1110 A/C Signal Circuit Malfunction - Suzuki Grand Vitara XL-7 Service Manual

6-58 ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM)

DTC P1110 A/C SIGNAL CIRCUIT MALFUNCTION

WIRING DIAGRAM
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze flame data by using scan tool.
3) Start engine and turn on A/C switch and heater blower fan switch.
4) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check Wire Harness
1) Remove ECM cover from ECM referring to
"Voltage Check" in this section.
2) Check voltage between C51-84 and ground at
engine idling.
Are they as follows?
D A/C switch and heater blower switch OFF: 0 V
D A/C switch and heater blower switch ON: about 12 V
ACTION YES
Go to Step 2.
Poor C51-84
connection.
If OK, substitute a
known-good ECM and
recheck.
1. A / C control module
2. ECM
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
D "YEL/BLK" wire
open or short or
D Poor A/C control
module connector
connection
If all are in good
condition, substitute
a known-good A/C
control module and
recheck.