EN(H4DOTC)(diag)-194
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
6
CHECK HARNESS BETWEEN SECONDARY
AIR PUMP RELAY AND SECONDARY AIR
PUMP CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the secondary air pump relay.
3) Measure the resistance of harness between
secondary air pump relay connector and sec-
ondary air pump connector.
Connector & terminal
(F9) No. 11 — (F11) No. 2:
Is the resistance less than 1
:
? Go to step
7
.
Repair the open
circuit in harness
between second-
ary air pump relay
connector and sec-
ondary air pump
connector.
7
CHECK HARNESS BETWEEN SECONDARY
AIR PUMP CONNECTOR AND CHASSIS
GROUND.
Measure the resistance of the harness between
secondary air pump connector and chassis
ground.
Connector & terminal
(F11) No. 1 — Chassis ground:
Is the resistance less than 5
:
? Go to step
8
.
Repair the open
circuit of the har-
ness between sec-
ondary air pump
connector and
chassis ground.
8
CHECK SECONDARY AIR PUMP RELAY.
1) Connect the battery to terminals No. 12 and
No. 13 of the secondary air pump relay.
2) Measure the resistance between secondary
air pump relay terminals.
Terminals
No. 14 — No. 11:
Is the resistance less than 1
:
? Go to step
9
.
Replace the sec-
ondary air pump
relay. <Ref. to
EN(H4DOTC)(diag)
-8, Electrical Com-
ponent Location.>
9
CHECK SECONDARY AIR PUMP RELAY
POWER SUPPLY.
1) Turn the ignition switch to ON.
2) Measure the voltage between the second-
ary air pump relay connector and chassis
ground.
Connector & terminal
(F9) No. 14 (+) — Chassis ground (–):
(F9) No. 12 (+) — Chassis ground (–):
Is the voltage 10 V or more?
Go to step
10
.
Repair the open or
ground short circuit
of power supply
circuit.
10
CHECK HARNESS BETWEEN ECM AND
SECONDARY AIR PUMP RELAY CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector of ECM.
3) Measure the resistance of harness between
ECM and secondary air pump relay connector.
Connector & terminal
(B136) No. 8 — (F9) No. 13:
Is the resistance less than 1
:
? Repair the poor
contact of ECM
connector.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Repair the open
circuit in harness
between ECM con-
nector and sec-
ondary air pump
relay connector.
• Poor contact of
coupling connector
Step
Check
Yes
No
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