Specifications

ON-BOARD DIAGNOSTIC
F77
F
Diagnostic procedure
STEP INSPECTION ACTION
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
(See F66 DTC CONFIRMATION
PROCEDURE.)
• Is same DTC present?
Yes Go to next step.
No Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See F227 INTERMITTENT CONCERN
TROUBLESHOOTING.)
2 INSPECT FRONT HO2S TERMINALS
• Turn ignition key to OFF.
• Disconnect front HO2S connector.
• Inspect for bent terminals.
• Is there any malfunction?
Yes Repair or replace terminal, then go to Step 6.
No Go to next step.
3 INSPECT FRONT HO2S HEATER
• Inspect front HO2S heater.
(See F56 HEATED OXYGEN SENSOR
(HO2S) INSPECTION.)
• Is front HO2S heater okay?
Yes Go to next step.
No Replace the front HO2S, then go to Step 6.
4 INSPECT PCM TERMINAL
• Disconnect PCM connector.
• Inspect for bent terminals.
• Are there any malfunctions?
Yes Repair terminal, then go to Step 6.
No Go to next step.
5 INSPECT FRONT HO2S HEATER CONTROL
CIRCUIT FOR SHORT TO POWER CIRCUIT
• Turn ignition key to ON (Engine OFF).
• Measure voltage between front HO2S terminal
D (harness-side) and body ground.
• Is there voltage B+?
Yes Repair or replace harness for shot to power circuit, then go
to next step.
No Go to next step.
DTC P0032 Front HO2S heater circuit high input