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Test Dr-13A - Testing EGR Temperature Sensor (CALIF) (Code 43)

WARNING: This page is about a different car, the 1994 Plymouth Laser and 1994 Eagle Talon. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For appropriate wiring diagram, see WIRING DIAGRAMS .
  1. Using DRB, erase faults. Start engine and idle for more than one minute. Read faults. If Code 43 is displayed again, go to next step. If Code 43 is not displayed again, wiggle EGR temperature sensor wiring harness while monitoring DRB display. If Code 43 is not set when wiring harness is wiggled, perform TEST DR-15A . If Code 43 is set when wiring harness is wiggled, repair wiring harness where wiggling caused Code 43 to set. Perform TEST VER-2.
  2. Read EGR temperature sensor value. Disconnect vacuum hose from EGR valve. Using an auxiliary vacuum pump, apply 5 in. Hg to EGR valve. If engine RPM drops, go to next step. If engine RPM does not drop, replace EGR valve. Perform TEST VER-2 .
  3. If EGR temperature value increases when engine RPM drops, go to step 6). If EGR temperature value does not increase when engine RPM drops, disconnect EGR temperature sensor connector. If EGR temperature sensor value is 10°F (-12°C) when EGR temperature sensor connector is disconnected, go to step 5). If EGR temperature sensor value is not 10°F (-12°C) when EGR temperature sensor connector is disconnected, go to next step.
  4. If EGR temperature value is 606°F (319°C) when EGR temperature sensor connector is disconnected, repair short to ground in Blue/Yellow wire between EGR temperature sensor connector and ECU connector terminal No. 15. Perform TEST VER-2. If EGR temperature sensor value is not 606°F (319°C) when EGR temperature sensor connector is disconnected, replace EGR temperature sensor. Perform TEST VER-2.
  5. Connect jumper wire across EGR temperature sensor connector terminals. If EGR temperature sensor value is 606°F (319°C), replace EGR temperature sensor. Perform TEST VER-2. If EGR temperature value is not 606°F (319°C), repair Green/Black wire between EGR temperature sensor and splice. Perform TEST VER-2.
  6. Ensure engine is off with ignition on. Using DRB, actuate EGR solenoid. If EGR solenoid does not click, go to next step. If EGR solenoid clicks, repair leak or restriction in EGR vacuum hose or solenoid. Perform TEST VER-2 .
  7. Using voltmeter, backprobe EGR solenoid connector Red wire. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair open circuit in Red wire between Multi-Point Injection (MPI) control relay and EGR solenoid. Perform TEST VER-2.
  8. Backprobe EGR solenoid connector Black/Yellow wire (turbo) or Brown/White wire (non-turbo). If voltage is less than 10 volts, go to next step. If voltage is more than 10 volts, replace EGR solenoid. Perform TEST VER-2.
  9. Turn ignition off. Disconnect EGR solenoid connector. Disconnect ECU 18-pin connector. Measure resistance between ECU 18-pin connector terminal No. 53 (Black/Yellow wire - turbo; Brown/White wire - non-turbo) and ground. If resistance is more than 10 ohms, go to next step. If resistance is less than 10 ohms, repair short to ground in ECU 18-pin connector terminal No. 53. Perform TEST VER-2.
  10. Measure resistance between ECU 18-pin connector terminal No. 53 (Black/Yellow wire - turbo; Brown/White wire - non-turbo) and EGR solenoid connector. If resistance is more than 10 ohms, repair open circuit in Black/Yellow wire (turbo) or Brown/White wire (non-turbo). Perform TEST VER-2. If resistance is less than 10 ohms, replace ECU. Perform TEST VER-2.
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