B2657

B262A, B262B, B2657, B2658 EXHAUST GAS/OUTSIDE ODOR DETECTING SENSOR





DTC Logic

DTC DETECTION LOGIC

NOTE:
- If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. HAC-
94, "DTC Logic".
- If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Control Unit Control Unit Control Unit, "DTC Logic".






DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select "Self Diagnostic Result" mode of "HVAC" using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES - SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect exhaust gas / outside odor detecting sensor connector.
3. Turn ignition switch ON.
4. Check voltage between exhaust gas / outside odor detecting sensor harness and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - GO TO 2.
2.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse [No3, located in fuse block (J/B)]

NOTE:
Fuse, Fusible Link And Relay Box.
Is the inspection result normal?
YES - GO TO 3.
NO - Replace blown fuse after repairing the affected circuit if a fuse is blown.
3.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR POWER SUPPLY CIRCUIT FOR
OPEN
1. Disconnect fuse block (J/B) connector.
2. Check continuity between exhaust gas / outside odor detecting sensor harness connector and fuse block
(J/B) connector.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair harness or connector.
4.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR POWER SUPPLY CIRCUIT FOR
GROUND SHORT
1. Disconnect exhaust gas / outside odor detecting sensor connector, ionizer connector, ECV connector and
A/C auto amp.connector.
2. Check continuity between exhaust gas / outside odor detecting sensor harness connector and ground.





Is the inspection result normal?
YES - Check ignition power supply circuit. Ignition Power Supply.
NO - Repair harness or connector.
5.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between exhaust gas / outside odor detecting sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair harness or connector.
6.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR INPUT SIGNAL
1. Connect exhaust gas / outside odor detecting sensor connector.
2. Turn ignition switch ON.
3. Check signal between exhaust gas / outside odor detecting sensor harness connector and ground with oscilloscope.






NOTE:
Signal differs depending on measurement environment of the vehicle.
Is the inspection result normal?
YES - GO TO 7.
NO - Replace exhaust gas / outside odor detecting sensor. Service and Repair.
7.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR INPUT SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect exhaust gas / outside odor detecting sensor connector and A/C auto amp.connector.
3. Check continuity between exhaust gas / outside odor detecting sensor harness connector and A/C auto amp. connector.





Is the inspection result normal?
YES - GO TO 8.
NO - Repair harness or connector.
8.CHECK
EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR INPUT SIGNAL CIRCUIT FOR
GROUND SHORT
Check continuity between exhaust gas / outside odor detecting sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 9.
NO - Repair harness or connector.
9.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR INPUT SIGNAL CIRCUIT FOR BATTERY SHORT
Check voltage between exhaust gas / outside odor detecting sensor harness and ground.





Is the inspection result normal?
YES - GO TO 10.
NO - Repair harness or connector.
10.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace A/C auto amp. Removal And Installation.
NO - Repair or replace malfunctioning parts.