Part(s) internal circuit check (short in FI MAIN RLY OUT line):
Part(s) internal circuit check (short in FI MAIN RLY OUT line)
?1.
Jump the SCS line with the HDS, and wait more than 1 minute.
?2.
Disconnect each of the parts or connectors below, one at a time, then check for continuity between test points 1 and 2.
PGM-FI main relay 2
PCM connector A (51P)
Injector relay
CMP sensor B 3P connector
CKP sensor 3P connector
Electronic throttle control system (ETCS) control relay
Test condition
Vehicle OFF (LOCK) mode
Test point 1
PGM-FI main relay 1 4P socket No. 2
Test point 2
Body ground
Does continuity go away when one of the above components is disconnected?
YES
Replace the part that made the short to body ground go away when it was disconnected. If the part is the PCM, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM. Also replace the No. A23 (15 A) fuse in the under-hood fuse/relay box.?
NO
Parts are OK. Go to step 6.
6.
Shorted wire check (FI MAIN RLY OUT line):
Shorted wire check (FI MAIN RLY OUT line)
?1.
Disconnect the following parts or connectors:
PGM-FI main relay 2
PCM connector A (51P)
Injector relay
CMP sensor B 3P connector
CKP sensor 3P connector
Electronic throttle control system (ETCS) control relay
?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
PGM-FI main relay 1: disconnected
PGM-FI main relay 2: disconnected
PCM connector A (51P): disconnected
Injector relay: disconnected
CMP sensor B 3P connector: disconnected
CKP sensor 3P connector: disconnected
Electronic throttle control system (ETCS) control relay: disconnected
Test point 1
PGM-FI main relay 1 4P socket No. 2
Test point 2
Body ground
Is there continuity?
YES
Repair a short in the FI MAIN RLY OUT wire between PGM-FI main relay 1 and each part. Also replace the No. A23 (15 A) fuse in the under-hood fuse/relay box.?
NO
The FI MAIN RLY OUT wire is OK. Replace PGM-FI main relay 1. Also replace the No. A23 (15 A) fuse in the under-hood fuse/relay box.?
7.
Fuse check 2:
Fuse check 2
?1.
Check the following fuse.
Fuse
No. B4 (15 A)
Location
Under-dash fuse/relay box
Is the fuse OK?
YES
Go to step 12.
NO
Go to step 8.
8.
Relay check:
Relay check
?1.
Remove the blown No. B4 (15 A) fuse from the under-dash fuse/relay box.
?2.
Remove PGM-FI main relay 2 (A) from the under-dash fuse/relay box.
Repair a short in the IG1 FUEL PUMP wire between the PCM (A4) and the No. B4 (15 A) fuse in the under-dash fuse/relay box. Also replace the No. B4 (15 A) fuse.?
NO
The IG1 FUEL PUMP wire is OK. Replace the No. B4 (15 A) fuse in the under-dash fuse/relay box, and update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.?
11.
Shorted wire check (FUEL PUMP RLY OUT line):
Shorted wire check (FUEL PUMP RLY OUT line)
?1.
Remove the access panel from the floor.
?2.
Disconnect the following connector.
Fuel tank unit 4P connector
?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
PGM-FI main relay 2: disconnected
Fuel tank unit 4P connector: disconnected
Test point 1
Fuel tank unit 4P connector No. 1
Test point 2
Body ground
Is there continuity?
YES
Repair a short in the FUEL PUMP RLY OUT wire between PGM-FI main relay 2 and the fuel tank unit. If the wire is OK, replace the under-dash fuse/relay box. Also replace the No. B4 (15 A) fuse.?
NO
The FUEL PUMP RLY OUT wire is OK. Check the fuel pump, and replace it if needed. Also replace the No. B4 (15 A) fuse in the under-dash fuse/relay box.?
12.
Open wire check (IG1 FUEL PUMP line):
Open wire check (IG1 FUEL PUMP line)
?1.
Jump the SCS line with the HDS, and wait more than 1 minute.
The FI MAIN RLY CL- wire is OK. Test PGM-FI main relay 1. If the relay is OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.?
NO
Repair an open in the FI MAIN RLY CL- wire between the PCM (A3) and PGM-FI main relay 1.?
17.
Determine possible failure area (+B IGP line, others):
Determine possible failure area (+B IGP line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Remove PGM-FI main relay 1 (A) from the under-dash fuse/relay box.
The PGM(GND), GND1, GND2, and GND3 wires are OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.?
NO
Repair an open in the PGM(GND), GND1, GND2, and/or GND3 wire between the PCM (B11, B12, C1, C8) and G101.?
