Mazda CX-7 2007 Workshop Manual page 126

DTC P0134 Front HO2S no activity detected
MAIN RELAY
FRONT HO2S HEATER
2B
WIRING HARNESS-SIDE CONNECTOR
1C
1D
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA AND
DIAGNOSTIC MONITORING TEST RESULTS
HAVE BEEN RECORDED
• Have the FREEZE FRAME DATA and
DIAGNOSTIC MONITORING TEST RESULTS
(HO2S related) been recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Bulletins and/or on-line
repair information availability.
• Is any related repair information available?
3 VERIFY RELATED PENDING AND STORED
DTC
Note
• If fuel monitor, DTC P0132 is retrieved,
ignore it until P0134 is fixed.
• Turn the ignition switch off, then to the ON
position. (Engine off)
• Verify pending and stored DTCs using the M-
MDS.
• Is the DTC P2237 or P2251 also present?
01-02–84
ON-BOARD DIAGNOSTIC [L3 WITH TC]
FRONT HO2S
1C
1B
1A
2D
FRONT HO2S
1A 2C 2A
1B 2D 2B
INSPECTION
7
7
7
7
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 the next step.
No Record the FREEZE FRAME DATA and DIAGNOSTIC
MONITORING TEST RESULTS 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 Go to the appropriate DTC troubleshooting procedures.
No Go to the next step.
PCM
2Z
2AC
2AD
2C
2I 2E 2A
2J 2F 2B
2K 2G 2C
2L 2H 2D
ACTION