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5 CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 103, 104, 107, harness connector F191 termi-
nals 6, 2, 1 and ECM terminals 101, 105, 102. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 7.
NG © GO TO 6.
6 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors F43, F191
I Harness for open or short between harness connector F191 and ECM
I Harness for open or short between ECM and injector
© Repair open circuit or short to ground or short to power in harness or connectors.
7 CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT (RIGHT BANK)
1. Remove intake manifold collector.
2. Disconnect injector harness connectors (Right bank).
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
MTBL0359
Continuity should exist.
OK or NG
OK © GO TO 8.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
SEF964XA
OK or NG
OK © GO TO 9.
NG © Replace injector.
INJECTOR
Diagnostic Procedure (Cont’d)
EC-612
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