Page 1593 of 2490
With EM012 and EM023 disconnected, measure the
resistance between EM012/022 and EM023/004. 1
Is the resistance < 0.5 OHM?
Yes GO to E14
No Inspect harness / connecto rs EM012, and EM023 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to E18
E14: CHECK FOR SHORT TO B+
Page 1595 of 2490
With EM010 and EM012 disconnected, measure the
voltage between EM010/023 and EM012/022. 1
Is the voltage 0 (zero) V?
Yes GO to E16
No Inspect harness / connecto rs EM010, EM012 and EM023
for corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to E18
E16: CHECK FOR SHORT TO B+ AT O2 SENSOR HEATER
Page 1596 of 2490
Ignition switch to position 0 1
Remove EMS fuse F14. 2
Disconnect EM010 and EM015. 3
Using a link lead, bridge EM010/016 and EM010/022. 4
Measure the voltage between EM010/023 and
EM015/001. 5
Is the voltage 0 (zero) V?
Yes Replace EMS fuse F14 but retain link lead.
GO to E17
No Inspect harness / connecto rs EM010, EM015, and EM023
for corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to E18
E17: CHECK B+ AT O2 SENSOR HEATER CIRCUIT
Page 1605 of 2490
With EM012 and EM023 disconnected, measure the
resistance between EM012/022 and EM023/004. 1
Is the resistance < 0.5 OHM?
Yes GO to F15
No Inspect harness / connectors EM012 and EM023 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to F19
F15: CHECK FOR SHORT TO B+
Page 1607 of 2490
With EM010 and EM012 disconnected, measure the
voltage between EM010/023 and EM012/022. 1
Is the voltatage 0 (zero) V?
Yes GO to F17
No Inspect harness / connecto rs EM010, EM012 and EM023
for corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to F19
F17: CHECK FOR SHORT TO B+ AT O2 SENSOR HEATER
Page 1608 of 2490
Ignition switch to position 0 1
Remove EMS fuse F14. 2
Disconnect EM010 and EM015. 3
Using a link lead, bridge EM010/016 and EM010/022. 4
Measure the voltage between EM010/023 and
EM015/001. 5
Is the voltage 0 (zero) V?
Yes Replace EMS fuse F14 but retain link lead
GO to F18
No Inspect connectors EM010, EM015, and EM023 for
corrosion, damaged / pushed back pins or repair the
harness; reconnect plug(s).
GO to F19
F18: CHECK B+ AT O2 SENSOR HEATER CIRCUIT
Page 1615 of 2490
With EM012 and EM024 disconnected, measure the
resistance between EM012/022 and EM024/001. 1
Is the resistance < 0.5 OHM?
Yes GO to G9
No Inspect harness / connecto rs EM012, and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G10
G9: O2 SENSOR SHORT CIRCUIT TO GROUND
Page 1620 of 2490
With EM012 and EM024 disconnected, measure the
resistance between EM012/022 and EM024/001. 1
Is the resistance < 0.5 OHM?
Yes GO to G16
No Inspect harness / connecto rs EM012, and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G20
G16: CHECK FOR SHORT TO B+
