Dodge Dakota (R1). Manual — part 153
Symptom:
P1660-REDUNDANT EMERG. STOP POWERSTAGE DEFECTIVE
When Monitored and Set Condition:
P1660-REDUNDANT EMERG. STOP POWERSTAGE DEFECTIVE
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an open or short to ground on the fuel shutdown solenoid
control circuit.
POSSIBLE CAUSES
INTERMITTENT CONDITION
FUEL SHUTDOWN SOLENOID CONTROL CIRCUIT OPEN
FUEL SHUTDOWN SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
FUEL SHUTDOWN SOLENOID (FUEL INJECTION PUMP) SHORTED INTERNALLY
INTERNAL FUEL INJECTION PUMP TEST
ENGINE CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, erase ECM DTCs.
Cycle the ignition on and off several times, pausing for 10 seconds at key off each
time.
Turn the ignition on.
With the DRB, read ECM DTCs.
Did this DTC reset?
All
Yes
→
No
→
2
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Fuel Injection Pump harness connector.
Measure the resistance of the Fuel Shutdown Solenoid Control circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the Fuel Shutdown Solenoid Control circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
147
DRIVEABILITY - DIESEL
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Fuel Injection Pump harness connector.
Measure the resistance between ground and the Fuel Shutdown Solenoid Control
circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the Fuel Shutdown Solenoid Control circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
4
Turn the ignition off.
Disconnect the Fuel Injection Pump harness connector.
Turn the ignition on.
With the DRB, actuate the Fuel Shutdown Solenoid.
Measure the voltage on the Fuel Shutdown Solenoid Control circuit.
Does the voltage cycle from B+ to below 1.0 volt?
All
Yes
→
Replace the Fuel Injection Pump in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
5
Disconnect the Fuel Injection Pump harness connector.
Measure the resistance between the following cavities in the Fuel Injection Pump
connector (fuel pump side):
Cavity 1 to cavities 4, 5, 6, 7, 8, 9, and 10.
Cavity 4 to cavities 5, 6, 7, 8, 9, and 10.
Cavity 5 to cavities 6, 7, 8, and 9.
Cavity 7 to cavities 6, 8, 9, and 10.
Cavity 8 to cavities 6 and 10.
NOTE: The resistance should be above 100 ohms for all measurements.
Is the resistance above 100 ohms for each of the measurements?
All
Yes
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Replace the Fuel Injection Pump in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
148
DRIVEABILITY - DIESEL
P1660-REDUNDANT EMERG. STOP POWERSTAGE DEFECTIVE —
Continued
TEST
ACTION
APPLICABILITY
6
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
149
DRIVEABILITY - DIESEL
P1660-REDUNDANT EMERG. STOP POWERSTAGE DEFECTIVE —
Continued
Symptom:
P1703-BRAKE SIGNAL PLAUS WITH REDUNDANT CONTACT
When Monitored and Set Condition:
P1703-BRAKE SIGNAL PLAUS WITH REDUNDANT CONTACT
When Monitored:
With the ignition on.
Set Condition:
The ECM detects the brake switch sense circuit and brake lamp switch
output circuit inputs to the ECM do not agree. NOTE: An out of adjustment brake lamp
switch may also cause a reduction in engine power.
POSSIBLE CAUSES
INTERMITTENT CONDITION
BRAKE LAMP SWITCH - SECONDARY OPEN
BRAKE LAMP SWITCH FUSED B+ CIRCUIT OPEN
SECONDARY BRAKE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
BRAKE LAMP SWITCH - PRIMARY OPEN
SECONDARY BRAKE SWITCH GROUND CIRCUIT OPEN
SECONDARY BRAKE SWITCH SIGNAL CIRCUIT OPEN
PRIMARY BRAKE SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE
PRIMARY BRAKE SWITCH SIGNAL CIRCUIT OPEN
ENGINE CONTROL MODULE - INTERNAL
ENGINE CONTROL MODULE - PRIMARY BRAKE SIGNAL
ENGINE CONTROL MODULE - SECONDARY BRAKE SIGNAL
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
While observing the PRIM BRAKE SWITCH status on the DRB display, press and
release the brake pedal several times.
Does the DRB display PRIM BRAKE SWITCH: PRESSED and RELEASED for the
appropriate pedal position?
All
Yes
→
No
→
2
Turn the ignition on.
While observing the SEC BRAKE SWITCH status on the DRB display, press and
release the brake pedal several times.
Does the DRB display SEC BRAKE SWITCH: PRESSED and RELEASED for the
appropriate pedal position?
All
Yes
→
No
→
150
DRIVEABILITY - DIESEL
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