[Dynomite]

Post 3 - ZR1 Electronics

TRY THESE FIRST
Check NO START Fuel or Electrical Issue
INFL REST
Electrical Connector Tools TIPS
Prom Chart TIPS
HVAC Diagnostic Codes TIPS
Removing the instrument Cluster TIPS
Trailering a ZR1 TIPS
HVAC Display Parameters TIPS
1991 ZR1 brochure
1990 ZR1 brochure
Plugs, Clutches, Other
Troubleshooting LT5
ZR1 as a daily driver
ZR1 Brochures
ZR1 reliability
LT5 Block numbers

SOLVING GENERAL TECHNICAL ISSUES
Tech1 TIPS
ALDL Error Code Flasher/Eraser TIPS
TPS Voltage Tips
Engine Hesitation with Haibeck Chip TIPS
Marc Haibeck on LT5 Eliminated Secondaries and Associated Anomalies
Check Secondary Operation with Plenum Tipped Up TIPS
HVAC Codes TIPS
No Start TIPS
Central Control Module Diagnostics TIPS
Developing miss
Cutting out under load
Slight miss
Engine noise
Full power stumble

BATTERY AND CHARGING
Battery poll
Tipping the Plenum to Remove Alternator
Alternator Replacement without Pulling Plenum TIPS
Alternator TIPS
The Battery Disconnect Switch TIPS
Quality Power Alternators TIPS
Alternator Rubber Boot Replace TIPS
How To Replace Battery TIP
Battery Connection Wrench TIP
Belt Tensioner Pulley
Serpentine Belt Path
Replacing Battery Cable Bolts
Replacing An Alternator
SYS light flashing
Roll start
Removing alternator
Ebay ZR1 Alternator
Ebay ZR1 LT5 Belt

ELECTRICAL CONNECTIONS
Manifold Pressure Differential TIPS
ECM Pin Connections Failed TIPS
AC Delco Connectors TIPS
Weatherpack Connectors TIPS
No Start Gauge Fuse TIPS
Cluster Identification TIPS
Window and AC Switch Connections TIPS
Cleaning Two Engine Block Ground Connections TIPS
Maintaining the Engine Block Ground Connections TIPS
Ground Connections TIPS
Engine Relays TIPS
Secondary Injector Drivers TIPS
Wire size capacity chart
Sensor connectors TIPS
Fuses (1991)
Weatherpack connectors
Tachometer Wire
Sources of connectors
ECM (90') pin diagram
Instrument panel wiring 90'

KEYLESS ENTRY, TACHOMETER, CRUISE
VKE-1000 system TIPS
VKE-1000 system Installation TIPS
Cruise Control Vacuum Release TIPS
Cruise Control Vacuum TIPS
Tachometer Calibration TIPS
Instrument Cluster Differences
Use of Trim Pot for Tachometer Calibration TIPS
Keyless Entry TIPS
Tachometer repair
Cruise control diagram

IGNITION
Power Key Rebuild TIPS
Power Keys 90'-95'
CMHSL LED, Full Power Key and Alternator Pulley
Secondary Injector Relays TIPS
DIS Diagnostics TIPS
Ignition System Modifications TIPS
Ignition Module Connections TIPS
Defeating VATS TIPS
Injector Fuse Pinched TIPS
No Start DIS Plug Ins TIPS
DIS Prototype TIPS
VATS
Ignition Key
VATS Time Delay
Ignition module location
VATS gotcha
Full power switch malfunction
Full power switch repair/replace
Power key rebuild
Anti-theft
Distributorless Ignition System (DIS)
DIS module correct grease
What is DIS
LT5 ignition system questions
Secondary Relay Discussion

COILS & PLUGS
Antiseize on Spark Plugs TIPS
Plug condition
Spark Plug Thread Chaser TIPS
Coils TIPS
Coil Base TIPS
Using Timing Light To Check Coils TIPS
Waste Spark Ignition TIPS
Spark Plug Wire Separators TIPS
Weak spark
Testing coils
Spark plug wire routing
Removing #8
Ebay ZR1 Spark Plugs

STARTER
Diagnosing Starter
Long Cranking
No Start Electrical Circuit Deterioration Explained
Starting Bench Testing TIPS
Starting System Schematics TIPS
Relay Locations TIPS
No Start Gauge Fuse TIPS
No Start Diagnostics TIPS
Starter Enable Relay TIPS
Starter Enable Relay Part Number TIPS
Starter Clutch Safety Switch TIPS
Intermittent No Start TIPS
Starter Electrical Connections TIPS
Starter Solenoid TIPS
Starter relay modification TIPS
Hold starter longer to prevent backfire TIPS
Starter Solenoid Rebuild TIPS
Starter Relay, Wiring Harness, and Plugs Tricks
Clutch Start Switch Linkage
No Start Clutch Switch Linkage
No start
No start cure
Starting issues
Ebay ZR1 Starter

LIGHTS
Headlight door motor bushings Video
Head Light Parts TIPS
Electric Window Switch Lights TIPS
Headlight Motor Aluminum Gear TIPS
Installing HID Driving Lights TIPS
Installing HID Fog Lights TIPS
Headlight door motor bushings
Headlight motor gear box
Backup Tail Light Switch
CMHSL LED install on my ZR-1
HID Install
HID Tail Lights
Headlight Motor Clicking
Euro Tail Lights Install
HID Head Lights
CHMSL LED
Installing CHMSL LED
CHMSL switch
CHMSL Wag
Back up lights conversion to 50W

SENSORS
ALDL Fault Codes TIPS
ALDL Fault Code Erasing TIPS
INFL REST Connectors Inside Car TIPS
INFL REST Codes TIPS
Upgraded INFL REST Code Clearing TIPS
Changing the Passenger Side O2 Sensor TIPS
Using Tech 1 TIPS
Service Bulletin for SIR TIPS
MAP Sensor Hose Fix TIPS
Crankshaft Sensor Testing TIPS
Oil Level Sensor TIPS
INFL REST FIX TIPS
INFLREST" and "SEATBELT Trouble Lights
Crank shaft position (93' no start)
EVAP Purge Solenoid
MAP sensor/hose location 90'
MAP sensor hose disconnected
Knock sensor testing
Knock sensor
TPS voltage reading
Throttle position sensor voltage
Replacing O2 sensors
O2 sensor with SW headers

CCM
Diagnostic Trouble Codes TIPS
Marc Haibeck code reading
Central Control Module Diagnostics TIPS
What is the CCM
Reading CCM codes paper clip
CCM Code 54
CCM interchangeability
Inflatable Restraint diagnostics

SRC
Marc Haibeck code reading
SRC Codes and Clearing SRC TIPS
Service Ride Control codes TIPS
ABS codes TIPS

ECM
Diagnostic Trouble Codes TIPS
GM Trouble Code Info TIPS
Marc Haibeck code reading
Closed Loop and Open Loop TIPS
ECM Interchangeability TIPS
ALDL Pin Out TIPS
Electronic Control Module Schematic TIPS
Electronic Control Module P/Ns TIPS
Electronic Control Module Codes TIPS
ECM Repair TIPS
GM codes
Fuel Trim and Closed/Open Loop Operation
ECM Chip and Other Electrical Connectors
ZR1 ECM CODES 1990 TO 1992
ECM (90') plug pins printout
Reading ECM codes paper clip
ALDL plug
ECM Repairs
ECMs and sensors

ECM MODIFICATIONS
Megasquirt Manual
Megasquirt
Chip poll
Identification of Stock Chips TIPS
Interchangeability of Chips in ECMs TIPS
Prom tuning guide
Chip Removal
Chips
Tuning
LS1 (411) PCM swap
Marc Haibeck (Performance)

DIAGNOSING ECM CODES
Using Tech 1 TIPS
ALDL Error Code Flasher/Eraser TIPS
Marc Haibeck code reading
Clearing Codes
Codes
Code 9 Low freon
Code 12 normal
Code 16 DIS system fault
Code 21 Throttle position
Code 23 Vehicle speed
Code 24 Speed sensor
Code 31 Cam sensor
Code 32 EGR
Code 33 MAP sensor hose
Code 41 ECM/CCM error
Code 41 Bad ECM
Code 41 ECM Troubleshooting
Code 42 Electronic Spark Timing (EST)
Code 43 knock sensor
Code 44 Oxygen Sensor (Left Bank Lean)
Code 45 Oxygen Sensor (Left Bank Rich)
See ECM Code #52 Item #3. ZR1 ECM CODES 1990-
Code 55 Lean 02
Code 56 Vacuum pump
Code 61 Vacuum/MAP sensors
Code 61 secondary vac solenoid
Code 63 Oxygen sensor
Code 63 Right Oxygen Sensor Circuit Open
Code 64 Right Oxygen Sensor (Right Bank Lean)
Code 65 Right Oxygen Sensor (Right Bank Rich)

Last UPDATE of post 3 May, 2024