Mazda Mazda6 Workshop Manual Supplement page 296

STEP
3 INSPECT GLOW PLUG RELAY CIRCUIT FOR
SHORT TO GND
• Turn engine switch to OFF.
• Inspect continuity between following
harnesses:
— Glow plug relay terminal A and body GND.
— Glow plug relay terminal C and body GND.
— Glow plug relay terminal D and body GND.
• Is there continuity?
4 INSPECT GLOW PLUG RELAY CIRCUIT FOR
SHORT TO POWER
• Turn engine switch to ON (Engine OFF).
• Inspect voltage between following harnesses:
— Glow plug relay terminal C and body GND.
— Glow plug relay terminal D and body GND.
• Is voltage below 1.0 V?
5 INSPECT GLOW PLUG RELAY CIRCUIT FOR
SHORT WITH EACH OTHER
• Turn engine switch to OFF.
• Inspect continuity between glow plug relay
terminals A and C.
• Is there continuity?
6 INSPECT GLOW PLUG RELAY CIRCUIT FOR
OPEN
• Turn engine switch to OFF.
• Inspect continuity between following
harnesses:
— Glow plug fuse and glow plug relay terminal
A.
— Glow plug relay terminal B and body GND.
• Is there continuity?
7 INSPECT GLOW PLUG RELAY
• Inspect glow plug relay.
(See T–19 RELAY
• Is there any malfunction?
8 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
9 INSPECT GLOW PLUG RELAY CIRCUIT FOR
OPEN
• Turn engine switch to OFF.
• Inspect continuity between following
harnesses:
— Glow plug relay terminal D and PCM
terminal 68.
— Glow plug relay terminal C and PCM
terminal 86.
• Is there continuity?
10 VERIFY TROUBLESHOOTING OF DTC P0380
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Start engine.
• Is same DTC present?
11 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See F2–86 AFTER REPAIR
• Is there any DTC present?
End Of Sie
F2–144
ON-BOARD DIAGNOSTIC
INSPECTION
INSPECTION)
PROCEDURE)
Yes Repair or replace harness for short to GND, go to Step 9.
No Go to next step.
Yes Go to next step.
No Repair or replace harness for short to power, go to Step 9.
Yes Repair or replace harness for short with each other, go to
Step 7.
No Go to next step.
Yes Go to next step.
No Repair or replace harness for open, go to Step 9.
Yes Replace glow plug relay, go to Step 9.
No Go to next step.
Yes Repair or replace suspected terminal, go to Step 9.
No Go to next step.
Yes Go to next step.
No Repair or replace harness for open, go to next step.
Yes Replace PCM, go to next step.
(See F2–64 PCM REMOVAL/INSTALLATION)
No Go to next step.
Yes Go to applicable DTC inspection.
(See F2–87 DTC TABLE)
No Troubleshooting completed.
ACTION