Chana M201 2014 Workshop Manual page 836

3.1.12-96
Test Conditions
1. General inspection
2. Inspect rear oxygen sensor heater resistance
3. Inspect heater working voltage
2 1
4 3
S14
M3112032
M201 2014.01
Electronic Control System - M7
Details/Results/Actions
A. Inspect the wire harness connector related to the
rear oxygen sensor for damage, poor contact, aging
and looseness.
Is it normal?
Yes
Go to step 2.
No
Repair the faulty area.
A. Turn the ignition switch to "LOCK".
B. Disconnect the rear oxygen sensor wiring harness
connector S14.
C. Measure the resistance of heater between terminals
1 and 3 of rear oxygen sensor.
Standard resistance: 7 ~ 14 Ω (normal
temperature)
Is it normal?
Yes
Go to step 3.
No
Replace the rear oxygen sensor. Make sure the
system is normal.
A. Turn the ignition switch to "LOCK".
B. Disconnect the rear oxygen sensor wiring harness
connector S14.
C. Turn the ignition switch to "ON".
D. Measure the voltage between terminal 3 of rear
oxygen sensor wiring harness connector S14 and
reliable grounding.
Standard voltage: 11 ~ 14 V
Is the voltage value normal?
Yes
Go to step 5.
No
Go to step 4.
3.1.12-96