Suzuki Wagon R Manual page 3799

6-4-118 ENGINE GENERAL INFORMATION AND DIAGNOSIS (Z10XEP AND Z12XEP ENGINES)
C-28: O2 Sensor Heater Circuit (HO2S-1)
Test Table
Test
T01 Check: Interruption of Voltage Supply Circuit
• Ignition OFF
• Disconnect wiring harness connector from:
HO2S-1
• Ignition ON
• Measure voltage between the following terminals:
HO2S-1 - Wiring harness connector (wiring harness side) terminal
C19-1
&
Ground
Yes: T02
T02 Check: Short to Voltage of Ground Circuit
• Ignition OFF
• Disconnect wiring harness connector from:
ECM (Wiring Harness Connector C36)
&
Radiator fan relay
• Ignition ON
• Measure voltage between the following terminals:
HO2S-1 - Wiring harness connector (wiring harness side) terminal
C19-2
&
Ground
Yes: T03
T03 Check: Component
• Ignition OFF
• Measure resistance between the following terminals:
HO2S-1 - Wiring harness connector (component side) terminal C19-1
&
HO2S-1 - Wiring harness connector (component side) terminal C19-2
Yes: T04
T04 Check: Component
• Measure resistance between the following terminals:
HO2S-1 - Wiring harness connector (component side) terminal C19-1
&
Ground
Yes: E01
Work Order Description Nominal Value
greater than 11 V
No: E05
less than 0.3 V
No: E04
8 – 10 Ω
The resistance of the
component is tempera-
ture - dependent.
Nominal value at 20 °C
(68 °F) is 9 Ω
No: E03
greater than 500 kΩ
No: E02