DTC P2238 Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)
DTC P2239 Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 1 Sensor 1)
DTC P2241 Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 2 Sensor 1)
DTC P2242 Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 2 Sensor 1)
DTC P2252 Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 1 Sensor 1)
DTC P2253 Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 1 Sensor 1)
DTC P2255 Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 2 Sensor 1)
DTC P2256 Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 2 Sensor 1)
HINT:
DESCRIPTION
Refer to DTC P2195
HINT:
MONITOR DESCRIPTION
The Air-Fuel Ratio (A/F) sensor varies its output voltage in proportion to the air-fuel ratio. If the A/F sensor impedance (alternating current resistance) or voltage output deviates greatly from the standard range, the ECM determines that there is an open or short malfunction in the A/F sensor circuit.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
P2238 and P2241 (open circuit between AF+ and AF-):
Others:
TYPICAL MALFUNCTION THRESHOLDS
P2238 and P2241 (Open circuit between AF+ and AF-):
P2238 and P2241 (Short circuit between AF+ and GND):
P2238 and P2241 (Short circuit between AF+ and AF-):
P2239 and P2242 (Short circuit between AF+ and +B):
P2252 and P2255 (Short circuit between AF- and GND):
P2253 and P2256 (Short circuit between AF- and +B):
WIRING DIAGRAM
Refer to DTC P2195.
INSPECTION PROCEDURE
HINT: For use of the intelligent tester only: Malfunctioning areas can be identified by performing the A/F CONTROL function provided in the ACTIVE TEST. The A/F CONTROL function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.
The following instructions describe how to conduct the A/F CONTROL operation using the intelligent tester.
HINT:
Standard voltage
NOTICE: The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds.
Following the A/F CONTROL procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
To display the graph, select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL / USER DATA / AFS B1S1 and O2S B1S2 or AFS B2S1 and O2S B2S2. Press the YES button and then the ENTER button. Then press the F4 button.
HINT:
1 INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)
Standard resistance: Bank 1
Bank 2
Result
2 INSPECT RELAY (A/F RELAY)
Standard resistance
3 CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM)
Standard voltage
Standard resistance : Check for open
Check for short
REPLACE ECM
Input Signal Circuit Malfunction
DTC P0607 Input Signal Circuit Malfunction
DESCRIPTION
This DTC indicates internal abnormalities of the ECM.
DTC No.
Detection Item
Trouble Area
P0607
The ECM has a supervisory CPU and control ECU
inside. When each input STP signal is different for 0.15 ...
Disassembly
1. REMOVE 2ND BRAKE PISTON RETURN SPRING
SUB-ASSEMBLY
(a) Place SST on the return spring and compress the
return spring with a press.
SST 09387-00060
(b) Using a screwdriver, remove the snap ring.
(c) Remove the 2nd brake piston return spring.
2. REMOVE 2ND BRAKE PISTON
(a) Hold ...
Inspection
1. INSPECT SHOCK ABSORBER ASSEMBLY REAR LH
(a) Push down and pull up the shock absorber rod, and
check that there is no unusual resistance or unusual
operation sound.
If there is any malfunction, replace the shock
absorber with a new one.
NOTICE:
When disposing of the shock absorber, se ...