2
43
DTC P0131 Signal Voltage Low (Non-Scan Diagnostics)
Step
Action
Yes
No
1
1. Disconnect and reconnect HO
2
sensor and ECM J2 (Black)
connectors.
2. Turn Ignition ON, Engine OFF.
3. Clear codes.
4. Turn Ignition OFF, and then back ON.
5. Does DTC return?
Go to step 2.
Problem corrected.
2
1. Turn Ignition OFF.
2. Back probe terminal C (Grey/Black wire) of HO
2
sensor
connector.
3. Connect terminal C back probe to red meter test lead on DVOM.
4. Back probe terminal D (Brown wire) of HO
2
sensor connector.
5. Connect terminal D back probe to black meter test lead on
DVOM.
6. Set DVOM to read volts DC.
7. Start and run engine for at least 2 minutes.
8. With engine running, observe voltage on DVOM.
9. Is reading 600 – 950 millivolts DC?
HO
2
sensor OK.
Go to step 3.
3
1. Turn Ignition OFF.
2. Remove probe from terminal C, and back probe ECM connector
terminal J2-17 (Grey/Black wire).
3. Start and run engine.
4. Observe voltage on DVOM.
5. Is reading 600 – 950 millivolts DC?
HO
2
sensor OK.
Verify that both
HO
2
sensor and ECM
J2 (Black) connectors
are fully mated.
NOTE:
If reading is
below 300 millivolts DC,
inspect exhaust system
for cracks or leaks
between muffler and
cylinder head (gaskets).
If everything is OK,
replace HO
2
sensor.
HO
2
Sensor Connector
ECM J2 (Black) Connector
Not for
Reproduction
Содержание VANGUARD M490000
Страница 2: ...N o t f o r R e p r o d u c t i o n ...
Страница 6: ...N o t f o r R e p r o d u c t i o n ...
Страница 84: ...3 80 MODEL 490000 EFI ELECTRICAL SCHEMATIC PAGE 1 OF 2 N o t f o r R e p r o d u c t i o n ...
Страница 85: ...3 81 MODEL 490000 EFI ELECTRICAL SCHEMATIC PAGE 2 OF 2 N o t f o r R e p r o d u c t i o n ...
Страница 88: ...3 84 MODELS 540000 610000 TURF EFI ELECTRICAL SCHEMATIC PAGE 1 OF 2 N o t f o r R e p r o d u c t i o n ...
Страница 89: ...3 85 MODELS 540000 610000 TURF EFI ELECTRICAL SCHEMATIC PAGE 2 OF 2 N o t f o r R e p r o d u c t i o n ...
Страница 92: ...3 88 MODEL 610000 MARINE EFI ELECTRICAL SCHEMATIC PAGE 1 OF 2 N o t f o r R e p r o d u c t i o n ...
Страница 93: ...3 89 MODEL 610000 MARINE EFI ELECTRICAL SCHEMATIC PAGE 2 OF 2 N o t f o r R e p r o d u c t i o n ...
Страница 95: ...3 91 MODELS 490000 540000 610000 FUSE RELAY BLOCK N o t f o r R e p r o d u c t i o n ...
Страница 96: ...3 92 N o t f o r R e p r o d u c t i o n ...
Страница 110: ...4 106 N o t f o r R e p r o d u c t i o n ...
Страница 115: ...5 111 This page is intentionally left blank N o t f o r R e p r o d u c t i o n ...
Страница 126: ...5 122 20 NOTE Access cover and blower housing removed for illustration purposes N o t f o r R e p r o d u c t i o n ...
Страница 134: ...5 130 30 N o t f o r R e p r o d u c t i o n ...
Страница 137: ...5 133 This page is intentionally left blank N o t f o r R e p r o d u c t i o n ...
Страница 138: ...5 134 32 N o t f o r R e p r o d u c t i o n ...
Страница 140: ...5 136 33 N o t f o r R e p r o d u c t i o n ...
Страница 142: ...5 138 This page is intentionally left blank N o t f o r R e p r o d u c t i o n ...
Страница 143: ...N o t f o r R e p r o d u c t i o n ...