EN(H4DOTC)(diag)-201
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN ECM AND
SECONDARY AIR COMBINATION VALVE
RELAY 1.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and
secondary air combination valve relay 1.
3) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B136) No. 30 (+) — Chassis ground (–):
Is the voltage 10 V or more?
Repair the short
circuit to power in
the harness
between ECM and
secondary air com-
bination valve relay
1.
Repair the poor
contact of ECM
connector.