Service Engine Now! -- what do I do

[wilsonwilson]

1987 Seville HT4100 173,000 miles on it and does not use a drop of oil. The AC stopped coming out of the dash vents (out defroster and floor though) so I thought it was the air mix door (VACUUM lines to the firewall ok) and I performed the following from my AllData Program

1. Remove glove box module.

2. Set temperature on Climate Control Panel (CCP) for32 °C (90 °F). Allow 1 to 2 minutes for programmer

arm to travel to maximum heat position.

3. Snap threaded rod from plastic retainer on programmer output arm.

4. Check air mix valve for free travel. Push valve to maximum A/C position, and check for binding.

5. Pre-load air mix valve in maximum heat position by pulling the threaded rod to ensure the valve is sealing.

Programmer output arm should be in maximum heat position.

6. Snap threaded rod into plastic retainer on programmer arm. Avoid moving programmer arm or

air mix valve.

7. Set temperature on CCP for l6°C (60 °F). Verify the programmer arm and air mix valve travel to the

max A/C position.

It worked fine so I "manually" made sure the door was ok......then the air mix door link(age) slipped out of the door lever. I had to remove 3 screws from the BCM shield because the lever is behind that plastic shield....Well I thought I had to un-plug the 3 BCM connectors and after I plugged them back in the car ran rough and I got a Service Engine Now 02? I had been getting a service engine soon 03 occasionally. I cannot find a "code 2" or even a "code 3" (from Service E Soon)

Any thoughts? I cannot afford NOW to take it to a Caddy dealer - My kingdom for a 283 or 327 like I used to work on as a teen!

[Dave in Texas]

What E codes and F codes are showing on the FDP? '87 Seville.....RWD, right?

"I had been getting a service engine soon 03 occasionally. I cannot find a "code 2" or even a "code 3" (from Service E Soon)"

What R these #s and how are you getting them/where are you seeing them?

E codes are from the ECM(electronic control module) and F codes are from the BCM(body computer module). You should be getting some E codes because of the Service Now telltale being illuminated.

I suggest you buy a Cadillac Factory Service Manual for your '87 Seville. There are more than 15 for sale on eBay and they are cheap. Best tool you can have to work on your Cadillac. Any other 'service' or manual is just a waste of money. The FSM is THE book to have.

[Cadillac Jim]

This is my list of OBD I E codes:

P000 (E000) Cruise Servo Apply Problem

P012 (E012) No Distributor Signal

P013 (E013) Right Oxygen Sensor Not Ready

P014 (E014) Shorted Coolant Temp Sensor

P015 (E015) Open Coolant Temp Sensor Signal

P016 (E016) Voltage Out of Range [ALL SOL]

P017 (E017) Left Oxygen Sensor not ready

P019 (E019) Shorted Fuel Pump Circuit

P020 (E020) Open Fuel Pump Circuit

P021 (E021) Shorted TPS Signal [VCC]

P022 (E022) Open TPS Signal [VCC]

P023 (E023) Electronic Spark Timing (EST) Signal problem [EGR]

P024 (E024) Vehicle Speed Sensor signal to TCC

P025 (E025) (Ignition Control Module) 24x Reference Low Indicator

P026 (E026) Shorted Throttle Signal Switch

P027 (E027) Open throttle signal switch

P028 (E028) Open 3rd or 4th Gear Shift Or Shorted 2-3 Shift Solenoid [VCC]

P029 (E029) Transaxle Shift 'B' solenoid problem (1st, 3rd, 4th gear)

P030 (E030) ISC RPM out of range

P031 (E031) Shorted MAP Sensor

P032 (E032) Open MAP Sensor Signal

P033 (E033) Wheel speed sensors problem

P034 (E034) MAP Sensor Signal Out of Range

P035 (E035) PCM reference low signal voltage Out of Range

P036 (E036) EGR Valve Pintle Position Out of Range

P037 (E037) Shorted MAT Sensor Signal

P038 (E038) Open MAT Sensor Signal

P039 (E039) Torque Converter Clutch/Viscous Converter Clutch Engagement Problem

P040 (E040) Power steering Pressure switch open

P041 (E041) No Cam Reference Signal from Ignition Control Module

P042 (E042) Left Oxygen Sensor Signal Lean

P043 (E043) Left Oxygen Sensor Signal Rich

P044 (E044) Right Oxygen Sensor Signal Lean

P045 (E045) Right Oxygen Sensor Signal Rich

P046 (E046) Right to Left Bank Fueling Difference

P047 (E047) IPC - PCM Data Problem

P048 (E048) Exhaust Gas Recirculation (EGR) system Problem

P049 (E049) Air Injection Reaction (AIR) System Fault

P050 (E050) Second Gear Circuit Pressure

P051 (E051) MEM-CAL Error

P052 (E052) PCM Memory Reset

P053 (E053) Distributor Signal Interrupt

P055 (E055) Closed Throttle Angle Out of Range [TPS]

P056 (E056) Transmission Input Speed Sensor

P057 (E057) Shorted 4th Gear Switch Circuit Or Shorted 3-4 Shift Solenoid

P058 (E058) PASSKey Control Problem

P059 (E059) Transmission Input speed sensor

P060 (E060) Cruise-Transaxle Not in Drive

P061 (E061) Cruise - Vent Solenoid Problem

P062 (E062) Cruise - Vacuum Solenoid Problem

P063 (E063) Set Vs

P064 (E064) Cruise - Vehicle Acceleration Too High

P065 (E065) Cruise - SPS Failure

P066 (E066) Cruise - RPM Out of Range

P067 (E067) Cruise Switch shorted at Enable

P068 (E068) Cruise Command Problem (servo out of range)

P069 (E069) Traction Control Active During Cruise Operation

P070 (E070) Intermittent TPS Signal

P071 (E071) Intermittent MAP Signal

P072 (E072) MAP sensor signal change without TPS signal change

P073 (E073) Intermittent Coolant Sensor Signal

P074 (E074) Intermittent MAT Signal

P075 (E075) Intermittent VSS Signal

P076 (E076) Transmission Pressure Solenoid

P080 (E080) Fuel System Rich

P081 (E081) CAM to 4X reference correlation problem

P083 (E083) Crankshaft to Ignition Module Failure

P085 (E085) Idle Throttle Angle Too High

P086 (E086) Undefined Gear Ratio (Transmission Pressure Control)

P088 (E088) Torque converter clutch did not disengage when commanded OFF by PCM

P089 (E089) Long Shift and Maximum Adapt (Trans

P090 (E090) VCC/TCC Brake Switch/Park/neutral switch Input Circuit Problem

P091 (E091) PRNDL Switch Problem (transaxle range switch problem)

P092 (E092) Heated Windshield Request Problem

P092 (E092) Traction Control System PWM Link Failure

P093 (E093) Traction control system signals were not received by PCM

P094 (E094) Transaxle Shift "A" Solenoid Problem (Vehicle Speed Sensor)

P095 (E095) Engine Stall Detected

P096 (E096) Torque Converter Overstress

P097 (E097) High RPM P/N to D/R Shift

P098 (E098) High RPM P/N to D/R Shift Under ISC

P099 (E099) Cruise Control Servo Applied, Not in Cruise

P102 (E102) Shorted brake Booster Vacuum (BBV) Sensor

P103 (E100) Open Brake Booster Vacuum Sensor

P105 (E105) Brake Booster Vacuum Too Low

P106 (E106) Sudden vehicle deceleration w/o brake switch being activated

P107 (E107) PCM/BCM Data Link Problem

P108 (E108) PROM error

P109 (E109) Keep Alive Memory (KAM) Reset/PCM has lost primary battery power

P110 (E110) Generator L-terminal Circuit Problem

P112 (E112) PCM PROM EPROM error

P117 (E117) Open/Short Solenoids/Solenoid Wiring (Transmission)

P119 (E119) Open or Shorted Fuel Injector

P120 (E120) A/C low side temperature sensor problem

P121 (E121) A/C high side temperature sensor problem

P122 (E122) A/C coolant temperature sensor signal voltage problem

P123 (E123) A/C refrigerant pressure was too low

P124 (E124) A/C compressor circuit was shorted (ON) w/o request by HVAC

P125 (E125) A/C high pressure switch/A/C high side temperature problem

P126 (E126) A/C high pressure switch disabled A/C compressor

P128 (E128) A/C was disabled because of high refrigerant pressure

P131 (E131) No signal from the knock sensor (PCM)

P132 (E132) Knock Sensor Circuitry Failure

P133 (E133) Loss of ABS communications/data

P134 (E134) Loss of IPC (instrument panel cluster) data

P135 (E135) Loss of HVAC data

P136 (E136) Loss of DERM (diagnostic energy reserve module) data

P137 (E137) Loss of TCS (traction control system) Data

[Dave in Texas]

My FSM for the '87 lists a total of 38 ECM E-codes and 14 BCM F-codes. The BCM F-codes deal with the Climate Control system.

[Cadillac Jim]

Ohhh. My list shows 108 E codes. I also have 34 S codes, 13 A codes, 36 R codes 27 T codes, 11 I codes, and 36 B codes. My OBD II list is far longer than I could get out of my 1997 FSM too because most of the codes are self-explanatory and the job doesn't require that you get involved with the FSM, like P1609-15, Loss of XXX serial data (make sure that module XXX is OK and its connector is clean and tight, trace the purple wire between the IPM and module XXX), etc. If the FSM lists 38 E codes, then it has 38 detailed diagnostics and repair instructions to go with them, in addition to the rest of the stuff on engine, electrical, sensors, and emissions repairs.

If the code is in the FSM, then it might be a good idea to make the FSM material available to WilsonWilson somehow. Otherwise, just knowing what the code means is likely enough.

[Dave in Texas]

He hasn't been back, so I assume his trouble is not that much of a problem....

[wilsonwilson]

He hasn't been back, so I assume his trouble is not that much of a problem"

All 1987 Seville's are FWD

I bought an Eldorado/Seville service manual about 3 years ago on ebay for $5.00 + 3-4 to send it to me.....but there are certain things even a manual doesn't cover but those that work on them on a daily basis through trial and error know what to do.

I haven't been back because I forgot where I put this darn link

BO00 The NO OUTPUTS display will not display "HI" nor "LO" as this is a resting spot where no

outputs will be cycled.

BO01 The CRUISE CONTROL VENT SOLENOID display is "HI" when the vent solenoid is on

(energized). The cruise ON/OFF switch must be on and the engine off for the output to cycle.

BO02 The CRUISE CONTROL VACUUM SOLENOID display is "HI" when the vacuum solenoid is

on (energized). The cruise ON/OFF switch must be on and the engine off for this output to

cycle.

BO03 The Retained Accessory Power (RAP) relays display is "LO" when the relays are on

(energized).

BO04 The courtesy relay display is "LO" when the relay is on (energized).

BO05 The twilight relay display is "LO" when the relays are on (energized) lights on.

BO06 The HI/LO beam relays display is "LO" when the relays are on (energized) hi beams on.

or

[Cadillac Jim]

Your rough idle may be due to the E002 test result. This is likely a disconnected EGR solenoid connector.

I think that these may be outputs for specific diagnostic procedures initiated through procedures given in the FSM, not necessarily OBD I codes, unless the OBD I codes that I have are not applicable to the 1987 model year:

P000 (E000) Cruise Servo Apply Problem

P021 (E021) Shorted TPS Signal [VCC]

P022 (E022) Open TPS Signal [VCC]

P023 (E023) Electronic Spark Timing (EST) Signal problem [EGR]

P028 (E028) Open 3rd or 4th Gear Shift Or Shorted 2-3 Shift Solenoid [VCC]

P036 (E036) EGR Valve Pintle Position Out of Range

P048 (E048) Exhaust Gas Recirculation (EGR) system Problem

P090 (E090) VCC/TCC Brake Switch/Park/neutral switch Input Circuit Problem

P099 (E099) Cruise Control Servo Applied, Not in Cruise

etc. (see earlier list posted in this thread). I don't have anything from E001 through E011, possibly to avoid confusion with testing output codes. To run the OBD codes, look in the FSM under "Instrument Panel Cluster" and find "Vehicle Diagnostic System" (these are the headings in my 1997 FSM). This paragraph is in my FSM, page 8C1-19, and reads:

VEHICLE DIAGNOSTIC SYSTEM

Displaying IPC Diagnostic Trouble Codes:

1. Ignition switch ON>
2. Simultaneously press the following buttions until all VF display segments (IPC and CCP) are illuminated: (A) Digital IPC, the climate control center (CCC) OFF and warmer (RED) buttons, or (
   
   Analog IPC, the climate control panel (CCP) OFF and PASS warmer (up arrow) buttons.
3. After the segment display test, the driver message center displays all set DTC (current and history) in the following order: PCM, IPC, ACM, SDM, TCS, PZM, IRC, RFA, CCP, MSM, MMM and PHN (RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options).
4. To bypass the DTC display press the FAN DOWN button.

This is followed by instructions on how to obtain some diagnostic parameters, program the RFA (key fob), etc. through the car's computer.

Your FSM and procedures will differ. My car and FSM are for the 1997 model year, so the manual style will be different and the process for reading the codes may be different. One thing that seems consistent over many model years is that the OBD code display is initiated by simultaneously holding the OFF and PASSENGER WARMER buttons simultaneously for several seconds, until all the dash lights come on (this is the dash light test). You exit the diagnostic mode by pressing the INFO RESET button on my car, or you can turn the key off.

Someone with an 1987 FSM or experience with the OBD readout from the 1987 model year will be able to give you something more specific.