Mazda CX 7. Manual - part 80
SYMPTOM TROUBLESHOOTING [L3 WITH TC]
01-03–17
01-03
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
Revised 10/2006 (Ref. No. R144/06)
NO.3 WILL NOT CRANK[L3 WITH TC]
id010339800900
Diagnostic procedure
3
WILL NOT CRANK
DESCRIPTION
Starter does not work.
POSSIBLE CAUSE
• Open starter circuit between the ignition switch and the starter
• Low or dead battery
• Charging system malfunction
• Starter malfunction
• TR switch misadjustment
• P/N position switch in TR switch open
• Seized/hydro-locked engine, flywheel
• Immobilizer system and/or related circuit malfunction
• Immobilizer system operates properly (Key is not registered.)
• Advanced keyless entry system malfunction
STEP
INSPECTION
RESULTS
ACTION
1
Note
• The following test should be performed on
the advanced keyless entry system. If not
equipped, go to the next step.
Start the engine using the standard ignition key.
Does the engine start?
Yes
Inspect the advanced keyless entry system and repair
or replace according to the inspection result.
No
Go to the next step.
2
Connect the M-MDS to the DLC-2.
Do any of the following conditions appear?
• Engine does not complete start.
• DTC B1681 is displayed.
Yes
Both conditions are appear:
Go to Step 6.
No
Either or other condition appears:
Go to the next step.
3
Is the coil connector securely connected to the
coil?
Yes
Go to the next step.
No
Connect the connector securely, retest from Step 2.
4
Does the security light illuminate?
Yes
Go to the next step.
No
Inspect and repair or replace the following:
• Instrument cluster
(See09-22-3 INSTRUMENT CLUSTER
INSPECTION.)
With advanced keyless entry system
• Between keyless CM 3X and instrument cluster 2R
• Between keyless CM 3W and instrument cluster 2T
Without advanced keyless entry system
• Between PCM 1AM and instrument cluster 2R
• Between PCM 1AI and instrument cluster 2T
5
Retrieve DTCs using the M-MDS. Are any of the
following DTCs present?
DTC B1213, B1342, B1600, B1601, B1602,
B1681, B2103, B2431
Yes
Go to the appropriate DTC test.
(See09-02B-3 DTC TABLE[IMMOBILIZER SYSTEM
(ADVANCED KEYLESS SYSTEM)].)
No
Advanced keyless entry system is not equipped:
Go to the next step.
Advanced keyless entry system is equipped:
Go to Step 11.
6
Is there continuity between PCM terminal 1BD,
1AZ, 1BH and ground?
Yes
Go to the next step.
No
Repair or replace the wiring harness.
7
Turn the ignition switch to the ON position
(Engine off.)
Measure voltage between PCM terminal 1BD,
1AZ, 1BH and ground.
Is the voltage below 1.0V?
Yes
Go to the next step.
No
Repair or replace the wiring harness.
8
Turn the ignition switch to the ON position.
(Engine off)
Access the VPWR PID.
Is the VPWR PID normal?
VPWR PID
Battery voltage
Yes
Go to the next step.
No
Repair or replace the wiring harness.
9
Disconnect the coil connector.
Turn the ignition switch to the ON position.
(Engine off)
Is there battery voltage at coil connector terminal
D?
Yes
Go to the next step.
No
Repair or replace the wiring harness between coil
connector terminal D and the fuse panel.