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3 DETECT MALFUNCTIONING PART
Check the following.
쐌 Fuse block (J/B) connector M31
쐌 15A fuse
쐌 Harness for open or short between fuse and fuel pump relay
䊳 Repair harness or connectors.
4 CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect fuel pump harness connector.
AEC933A
3. Check harness continuity between fuel pump terminal 2 and body ground, fuel pump terminal 1 and fuel pump relay
terminal 3. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK 䊳 GO TO 6.
NG 䊳 GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
쐌 Harness connectors M67, B101
쐌 Harness for open or short between fuel pump and body ground
쐌 Harness for open or short between fuel pump and fuel pump relay
䊳 Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 11 and fuel pump relay terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK 䊳 GO TO 8.
NG 䊳 GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
쐌 Harness connectors M81, F36
쐌 Harness for open or short between ECM and fuel pump relay
䊳 Repair open circuit or short to ground or short to power in harness or connectors.
FUEL PUMP
VG33E
Diagnostic Procedure (Cont’d)
EC-1181
GI
MA
EM
LC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
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