Mazda CX-7 2007 Workshop Manual page 105

DTC P0116[L3 WITH TC]
DTC P0116 ECT circuit range/performance problem
• The PCM monitors the maximum value and minimum value of engine coolant temperature when the engine
is started and5 min have been passed after leaving the vehicle 6 h or more. If the difference between the
maximum and the minimum values of the engine coolant temperature is below 6 °C {10.8 °F}, the PCM
determines that there is an ECT circuit range/performance problem.
DETECTION
Diagnostic support note
CONDITION
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
• ECT sensor malfunction
POSSIBLE
• Connector or terminal malfunction
CAUSE
• PCM malfunction
4
ECT SENSOR
WIRING HARNESS-SIDE CONNECTOR
B A
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
3 INSPECT ECT SENSOR CONNECTOR FOR
POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the ECT sensor connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Is there any malfunction?
ON-BOARD DIAGNOSTIC [L3 WITH TC]
ECT SENSOR
3
A
3
B
INSPECTION
5
2AH
5
2AY
PCM
WIRING HARNESS-SIDE CONNECTOR
2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z 2V 2R 2N
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
Yes Go to ne, then go next step.
No Record FREEZE FRAME DATA on the repair order, then go
to the next step.
Yes Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Repair or replace the terminal, then go to Step 6.
No Go to the next step.
id010239803900
PCM
2E 2A
2I
2J 2F 2B
2K 2G 2C
2H 2D
2L
ACTION
01-02–63
01-02