Chrysler New Yorker. Manual - part 568

TEST TC-21A

CONTINUED - REPAIRING - INJECTOR CONTROL CIRCUIT

NOTES

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TEST TC-21A

CONTINUED - REPAIRING - INJECTOR CONTROL CIRCUIT

Refer to the chart below and perform the diagnostic test that corresponds to the trouble code
displayed on the DRBIII

T

.

TROUBLE CODE

DIAGNOSTIC TEST

INJECTOR #1 CONTROL CIRCUIT

TC-21B

INJECTOR #2 CONTROL CIRCUIT

TC-20A

INJECTOR #3 CONTROL CIRCUIT

TC-19A

INJECTOR #4 CONTROL CIRCUIT

TC-61A

INJECTOR #5 CONTROL CIRCUIT

TC-69A

INJECTOR #6 CONTROL CIRCUIT

TC-70A

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TEST TC-21B

REPAIRING - INJECTOR #1 CONTROL CIRCUIT

Perform TEST TC-21A Before Proceeding

FIG. 1

FIG. 2

FIG. 3

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TEST TC-21B

REPAIRING - INJECTOR #1 CONTROL CIRCUIT

Perform TEST TC-21A Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

NOTE: IT MAY BE 

DISCONNECT INJECTOR 

START TEST 

NECESSARY TO 

REFER TO SERVICE

#1 HARNESS

TC-21B.

REMOVE THE INTAKE 

MANUAL FOR

CONNECTOR.** 

PLENUM IN THE

INSTRUCTIONS.

SEE GENERAL INFO 4.1

FOLLOWING STEPS. 

USING A VOLTMETER, 

USING THE DRB, MEASURE THE ASD

DOES 

THE VOLTAGE

NO 

PERFORM TEST 

ACTUATE THE ASD

RELAY OUTPUT 

CYCLE FROM 0 TO 12 

TC-21C.

RELAY. CIRCUIT. VOLTS? 

FIG. 1

YES

USING AN OHMMETER,

MEASURE THE

IS 

THE RESISTANCE NO REPLACE THE FUEL 

RESISTANCE ACROSS 

BETWEEN 10.0 AND

INJECTOR.* 

THE INJECTOR.

16.0 OHMS?

YES

DISCONNNECT THE

RECONNECT THE

POWERTRAIN CONTROL

INJECTOR HARNESS

MODULE HARNESS

CONNECTOR. CONNECTORS.**

SEE GENERAL INFO 4.1

USING A FUSED

USING A 12 VOLT 

JUMPER, JUMPER B+ TO 

TEST LIGHT, PROBE

DID THE TEST LIGHT

YES

REPLACE THE

THE ASD RELAY OUTPUT 

THE INJECTOR #1 

ILLUMINATE?

POWERTRAIN CONTROL

CKT AT THE PCM

CIRCUIT TO GROUND.

MODULE.* 

HARNESS CONN. FIG. 2

FIG. 2

NO 

USING AN OHMMETER,

REPAIR THE SHORT

DISCONNECT THE

MEASURE THE

IS THE RESISTANCE 

NO 

TO GROUND IN THE

INJECTOR HARNESS

INJECTOR #3 DRIVER 

BELOW 5.0 OHMS?

INJECTOR #1 DRIVER 

CONNECTOR.** CIRCUIT TO 

GROUND.

CIRCUIT.*

FIG. 1

YES

DRIVER CIRCUIT

USING AN OHMMETER,

FROM THE INJECTOR 

IS THE RESISTANCE 

NO 

REPAIR THE OPEN 

MEASURE THE

CONNECTOR TO THE

BELOW 5.0 OHMS?

INJECTOR #1 DRIVER 

INJECTOR #1 ...

PCM CONN.

CIRCUIT.*

FIG. 3

YES

CONTINUE TEST 

TC-21B ON THE

NEXT PAGE 

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