Page 200 of 436
TEST TC-53ACONTINUED - REPAIRING - GLOW RELAY #1 CONTROLLER SHORT CIRCUIT
FIG.1
FIG.2
FIG.3
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Page 201 of 436
TEST TC-53ACONTINUED - REPAIRING - GLOW RELAY #1 CONTROLLER SHORT CIRCUIT
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TEST TC-53A
CONTINUED FROM TURN IGNITION OFF.
THE PREVIOUS REMOVE THE GLOW
PAGE. PLUG #1 RELAY.**
USING AN OHMMETER, 85 AND 86 IS THE RESISTANCE
MEASURE RESISTANCE 85 AND 87 BELOW 30.0 OHMS YES REPLACE THE GLOW
BETWEEN GLOW PLUG 85 AND 30 FOR ANY OF THE PLUG #1 RELAY.*
#1 RELAY 85 AND 87A MEASUREMENTS?
TERMINALS... FIG.1
NO
DISCONNECT THE ECM REMOVE THE DIESEL
HARNESS POWER RELAY.**
CONNECTORS.**
WITH A JUMPER WIRE, TURN IGNITION ON.
CONNECT DIESEL POWER
RELAY CONN. CAVITIES USE A VOLTMETER IN
30 AND 87 (IN PDC). THE FOLLOWING
FIG.2 STEP.
MEASURE THE GLOW REPAIR GLOW PLUG
PLUG #1 RELAY IS THE VOLTAGE YES #1 RELAY CONTROL
CONTROL CIRCUIT. ABOVE 1.0 VOLT? CIRCUIT FOR SHORT
TO VOLTAGE.*
FIG.3
NO
REPLACE THE ENGINE
CONTROL MODULE.*
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Page 202 of 436
TEST TC-54AREPAIRING - GLOW RELAY #2 CONTROLLER SHORT CIRCUIT
Perform TEST DTC Before Proceeding
FIG.1
FIG.2
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Page 203 of 436
TEST TC-54AREPAIRING - GLOW RELAY #2 CONTROLLER SHORT CIRCUIT
Perform TEST DTC Before Proceeding
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
START TEST WITH THE DRB, IS THE GLOW PLUG NO CONTINUE
TC-54A. ACTUATE GLOW PLUG #2 RELAY CLICKING? TEST-54A ON THE
#2 RELAY. NEXT PAGE.
YES
THE CONDITION TO SET USING THE SCHEMATIC
THE TROUBLE CODE IS AS A GUIDE, INSPECT WERE ANY PROBLEMS YES REPAIR AS
NOT PRESENT. THE WIRING AND FOUND? NECESSARY.*
CONNECTORS.
FIG.1 FIG.2
NO
WIGGLE THE WIRING NOTE: THE DRB MUST REPAIR AS
HARNESS FROM THE STILL BE ACTUATING DID THE WIGGLING YES NECESSARY WHERE
GLOW #2 RELAY TO THE GLOW PLUG #2 INTERRUPT THE WIGGLING CAUSED
THE ENGINE CONTROL RELAY. CLICKING? CLICKING TO BE
MODULE.INTERRUPTED.*
NO
REFER TO GENERAL
INFORMATION 3.3.2 YES
FOR ADDITIONAL TEST COMPLETED.*
INFORMATION ON
INTERMITTENT CODES.
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Page 204 of 436
TEST TC-54ACONTINUED - REPAIRING - GLOW RELAY #2 CONTROLLER SHORT CIRCUIT
FIG.1
FIG.2
FIG.3
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Page 205 of 436
TEST TC-54ACONTINUED - REPAIRING - GLOW RELAY #2 CONTROLLER SHORT CIRCUIT
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TEST TC-54A
CONTINUED FROM TURN IGNITION OFF.
THE PREVIOUS REMOVE THE GLOW
PAGE. PLUG #2 RELAY.**
USING AN OHMMETER, 85 AND 86 IS THE RESISTANCE
MEASURE RESISTANCE 85 AND 87 BELOW 30.0 OHMS YES REPLACE THE GLOW
BETWEEN GLOW PLUG 85 AND 30 FOR ANY OF THE PLUG #2 RELAY.*
#2 RELAY 85 AND 87A MEASUREMENTS?
TERMINALS... FIG.1
NO
DISCONNECT THE ECM REMOVE THE DIESEL
HARNESS POWER RELAY.**
CONNECTORS.**
WITH A JUMPER WIRE, TURN IGNITION ON.
CONNECT DIESEL POWER
RELAY CONN. CAVITIES USE A VOLTMETER IN
30 AND 87 (IN PDC). THE FOLLOWING
FIG.2 STEP.
MEASURE THE GLOW REPAIR GLOW PLUG
PLUG #2 RELAY IS THE VOLTAGE YES #2 RELAY CONTROL
CONTROL CIRCUIT. ABOVE 1.0 VOLT? CIRCUIT FOR SHORT
TO VOLTAGE.*
FIG.3
NO
REPLACE THE ENGINE
CONTROL MODULE.*
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Page 225 of 436

TEST TC-62ACONTINUED - REPAIRING - INTAKE AIR TEMPERATURE SENSOR SIGNAL HIGH
EXCEEDED
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TEST TC-62A KEY OFF.
CONTINUED FROM DISCONNECT THE
THE PREVIOUS BOOST PRESSURE
PAGE. SENSOR HARNESS
CONNECTOR.**
WITH A JUMPER WIRE, TURN IGNITION ON.
DISCONNECT THE ECM REMOVE THE DIESEL CONNECT DIESEL POWER
HARNESS POWER RELAY.** RELAY CONN. CAVITIES USE A VOLTMETER IN
CONNECTORS.** 30 AND 87 (IN PDC). THE FOLLOWING
FIG.1 STEP.
MEASURE THE IAT REPAIR THE INTAKE
SENSOR SIGNAL IS THE VOLTAGE YES AIR TEMPERATURE
CIRCUIT. ABOVE 1.0 VOLT? SENSOR SIGNAL
CIRCUIT FOR A
FIG.2 SHORT TO VOLTAGE.*
NO
KEY OFF. USING AN OHMMETER, REPAIR THE OPEN
MEASURE THE IAT IS THE RESISTANCE NO INTAKE AIR
REMOVE THE JUMPER SENSOR SIGNAL BELOW 5.0 OHMS? TEMPERATURE SENSOR
WIRE. CIRCUIT. SIGNAL CIRCUIT.*
FIG.3
YES
CONNECT A JUMPER DOES THE DRB
BETWEEN THE INTAKE WITH THE DRB, DISPLAY "INTAKE YES REPLACE THE BOOST
AIR TEMP SENSOR ERASE AND THEN AIR TEMPERATURE PRESSURE SENSOR.*
SIGNAL AND SENSOR READ CODES. SENSOR LOW
GROUND CKT. FIG.1 EXCEEDED"?
NO
MOVE THE JUMPER DOES THE DRB
WIRE FROM THE WITH THE DRB, READ DISPLAY "INTAKE YES REPAIR THE OPEN
SENSOR GROUND TO CODES. AIR TEMPERATURE SENSOR GROUND
AN ENGINE GROUND. SENSOR LOW CIRCUIT.*
EXCEEDED"?
NO
REPLACE THE ENGINE
CONTROL MODULE.*
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Page 233 of 436

TEST TC-72ACONTINUED - REPAIRING - NEEDLE MOVEMENT SENSOR SRC HIGH EXCEEDED
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TEST TC-72A KEY OFF.
CONTINUED FROM DISCONNECT THE
THE PREVIOUS NEEDLE MOVEMENT
PAGE. SENSOR HARNESS
CONNECTOR.**
CONNECT A JUMPER DOES THE DRB
BETWEEN THE NEEDLE WITH THE DRB, READ DISPLAY "NEEDLE YES REPLACE THE NEEDLE
SENSOR SIGNAL AND CODES. MOVEMENT SENSOR MOVEMENT SENSOR.*
SENSOR GROUND CKT. SRC LOW EXCEEDED"?
FIG.1
NO
MOVE THE JUMPER DOES THE DRB
WIRE FROM THE WITH THE DRB, READ DISPLAY "NEEDLE YES REPAIR THE OPEN
SENSOR GROUND TO CODES. MOVEMENT SENSOR SENSOR GROUND
AN ENGINE GROUND. SRC LOW EXCEEDED"? CIRCUIT.*
NO
KEY OFF. WITH A JUMPER WIRE,
DISCONNECT THE ECM REMOVE THE DIESEL CONNECT DIESEL POWER
HARNESS POWER RELAY. RELAY CONN. CAVITIES
CONNECTORS.** 30 AND 87 (IN PDC).
FIG.2
KEY ON. MEASURE REPAIR THE SHORT
USE A VOLTMETER IN THE NEEDLE IS THE VOLTAGE YES TO VOLTAGE ON THE
THE FOLLOWING MOVEMENT SENSOR ABOVE 0.5 VOLT? NEEDLE MOVEMENT
STEP. SIGNAL CIRCUIT. SENSOR SIGNAL
FIG.1 CIRCUIT.*
NO
KEY OFF. MEASURE THE NEEDLE
MOVEMENT SENSOR IS THE RESISTANCE YES REPLACE THE ENGINE
USE AN OHMMETER IN SIGNAL CIRCUIT. BELOW 5.0 OHMS? CONTROL MODULE.*
THE FOLLOWING
STEP. FIG.3
NO
REPAIR THE OPEN
NEEDLE MOVEMENT
SENSOR SIGNAL
CIRCUIT.*
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