Mazda CX-7 2007 Workshop Manual page 242

STEP
7 INSPECT MAIN RELAY CONNECTOR FOR
POOR CONNECTION
• Turn the ignition switch to off.
• Disconnect the main relay.
• Inspect for poor connection (such as damaged,
pulled out terminals, corrosion).
• Is there any malfunction?
8 INSPECT POWER SUPPLY OF MAIN RELAY
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage between main relay
terminal D (harness-side) and body ground.
• Is the voltage B+?
9 INSPECT POWER SUPPLY FOR CONTROL
CIRCUIT OF MAIN RELAY
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage between main relay
terminal A (harness-side) and body ground.
• Is the voltage B+?
10 INSPECT MAIN RELAY
• Inspect the main relay.
(See09-21-4 RELAY INSPECTION.)
• Is the main relay normal?
11 INSPECT POWER CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch to off.
• Disconnect the main relay and the PCM
connector.
• Check for continuity between main relay
terminal C (harness-side) and PCM terminal
1BE (harness-side).
• Is there continuity?
12 INSPECT CONTROL CIRCUIT FOR OPEN
CIRCUIT
• Check for continuity between main relay
terminal E (harness-side) and PCM terminal
1AT (harness-side).
• Is there continuity?
13 INSPECT DRIVE-BY-WIRE-RELAY OUTPUT
VOLTAGE
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage between PCM terminal
1BF (harness-side) and body ground.
• Is the voltage B+?
14 INSPECT DRIVE-BY-WIRE-RELAY
CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch to off.
• Disconnect the drive-by-wire-relay.
• Check drive-by-wire-relay connector (harness-
side) for poor connection (such as damaged,
pulled out terminals, corrosion).
• Is there any malfunction?
15 INSPECT POWER SUPPLY OF DRIVE-BY-
WIRE-RELAY
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage between drive-by-wire-
relay terminal D (harness-side) and body
ground.
01-02–200
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Repair or replace the terminal, then go to Step 22.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 22.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 22.
Yes Go to the next step.
No Replace the main relay, then go to Step 22.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 22.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 22.
Yes Go to the next step.
No Repair or replace the wiring harness for a short to power
supply, then go to Step 22.
Yes Repair or replace the terminal, then go to Step 22.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 22.
ACTION