Mazda Mazda6 Workshop Manual Supplement page 331

STEP INSPECTION
4 Connect WDS or equivalent to DLC-2 and
retrieve DTC.
DTC
B1213, B1342, B1600, B1601, B1602, B1681,
B2103, B2431
5 Is there continuity between PCM GND terminals
65, 85, 103, 104 and GND?
6 Measure voltage between PCM GND terminals
65, 85, 103, 104 and coil terminal C.
Is the voltage below 1.0?
7 Turn engine switch to ON.
Access VPWR PID.
Is VPWR PID okay?
Specification
Battery voltage
8 Disconnect coil connector.
Turn engine switch to ON.
Is there battery voltage at coil connector terminal
D (harness-side)?
9 Is there continuity between PCM terminal 57 and
starter relay?
10 Inspect for following:
• Fuel quality (e.g.: include water
contamination, winter/summer blend)
• Fuel line/fuel filter clogging
• Intake-air system restriction
Are all items okay?
11 Is engine overheating?
12 Note
• Ignore DTC P0122, P0123, P0222 or
P0223 while performing this test.
Disconnect accelerator position sensor
connector.
Measure voltage at accelerator position sensor
connector VREF terminal (terminal D) with
engine switch ON.
Specification
4.5—5.5 V
Is voltage okay?
13 Connect WDS or equivalent to DLC-2.
Turn engine switch to ON.
Retrieve any DTC.
Is DTC displayed?
14 Does engine start normally after warm-up?
TROUBLESHOOTING
RESULTS
Yes Go to appropriate DTC test.
No Go to next step.
Yes Go to next step.
No Repair or replace wiring harness.
Yes Go to next step.
No Repair or replace wiring harness.
Yes Go to next step.
No Repair or replace wiring harness.
Yes Inspect for following:
• Open or short circuit between coil terminal A and
• Open or short circuit between coil terminal B and
No Repair or replace wiring harness between coil
connector terminal D and fuse panel.
Yes Go to next step.
No Repair replace wiring harness.
Yes Go to next step.
No Service as necessary.
Repeat Step 10.
Yes Go to symptom troubleshooting "NO.17 COOLING
SYSTEM CONCERNS-OVERHEATING".
No Go to next step.
Yes Go to next step.
No Go to symptom troubleshooting "NO.26 CONSTANT
VOLTAGE".
Yes DTC is displayed:
Go to appropriate DTC test.
Communication error message is displayed:
Inspect for following:
• Open circuit between PCM control relay and PCM
• Open circuit PCM control relay and PCM terminal
• PCM control relay stuck open
• Open or poor GND circuit (PCM terminal 65, 85,
• Poor connection vehicle body GND
No No DTC is displayed:
Go to next step.
Yes Inspect glow system operation.
(See
Replace any malfunctioning part as necessary.
If glow system is okay, go to next step.
No Go to next step.
ACTION
PCM terminal 80
PCM terminal 28
terminal 53 or 79
69
103 or 104)
T–19 RELAY INSPECTION)
F2
F2–179