Originally Posted by JeremyAnderson
just got the SRT back from the dealer today for the third time and still no resolution for an inoprative IC pump. The pump is good, it works if 12v are wired to it directly or if the fuse box is bypassed. There is a pulse going to the Pulse Module from the ECU which is suppose to turn the pump on, but still no power is going to the pump. all of the wires have been traced and no shorts have been found in the wiring. The fuse block has been replaced along with the ECU and the Pulse Module. The tech has worked on the car for 4 days now and has all but given up.
Chrysler won't (can't) give the tech the support he needs. They just tell him that they didn't design the car, so they aren't sure how to trouble shoot the problem. The service writer is telling me that they have thrown enough money and parts at it and they have to draw the line somewhere even if the problem isn't fixed.
My question to you guys is: With the key on, engine off, if you put your hand on the IC pump can you feel it running?
COOLANT CIRCULATION PUMP CIRCUIT (CONTINUED)
2. MEASURE THE VOLTAGE OF THE COOLANT CIRCULATION PUMP CONTROL CIRCUIT
With the ignition off.
Disconnect the A/C Heater Control Module harness connector.
Note: Check connector - Clean/repair as necessary.
Connect a jumper wire between the terminals in the Coolant Circula-
tion Pump harness connector.
Measure the voltage of the Coolant Circulation Pump Control circuit at
the A/C Heater Control Module harness connector.
Is the voltage above 10 volts?
Yes >> Go to 3
No >> Repair the Coolant Circulation Pump Control circuit for an
open.
Perform BODY VERIFICATION TEST.
3. MEASURE THE VOLTAGE OF THE COOLANT CIRCULATION PUMP CONTROL CIRCUIT
With the ignition off.
Reconnect the Coolant Circulation Pump harness connector.
Measure the voltage of the Coolant Circulation Pump Control circuit at
the A/C Heater Control Module harness connector.
Is the voltage above 10 volts?
Yes >> Replace the A/C Heater Control Module. (Refer to 24 -
HEATING & AIR CONDITIONING/CONTROLS/HEATER
CONTROL - REMOVAL).
Perform BODY VERIFICATION TEST.
No >> Replace the Coolant Circulation Pump. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING/ELECTRIC
COOLANT PUMP - REMOVAL).
Perform BODY VERIFICATION TEST.
24 - 42 HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS ZH
MAKE THEM FIX IT... OR MAKE THEM PAY FOR A MB DEALERSHIP TO FIX IT>>.