Part 4
1NZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604: Startability Malfunction
P1604 - Startability Malfunction - (Continued)
80. READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches should be off
(d) Using the Techstream, select and read [ISC Learning Value] in the Data List.
Result:
B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
A -- Continue to next step.
81. CHECK CYLINDER COMPRESSION PRESSURE
(a) Inspect the compression Engine.
NG -- CHECK AND REPAIR ENGINE ASSEMBLY
OK -- CHECK VALVE TIMING
82. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Inspect the engine coolant temperature sensor Testing and Inspection.
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR
OK -- Continue to next step.
83. CHECK FUEL PRESSURE
HINT
For the fuel pressure inspection, refer to the following procedures Testing and Inspection.
(a) Attach a fuel pressure gauge and check the fuel pressure when cranking the engine and after stopping the engine.
Standard:
NG -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)
OK -- Continue to next step.
84. READ VALUE USING TECHSTREAM (LONG FT #1)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, select and read [Long FT #1] in the Data List.
Result:
B -- REPLACE FUEL INJECTOR
A -- Continue to next step.
85. PERFORM SIMULATION TEST
(a) Check if the idling speed after starting the engine is currently stable and has always been stable in the past.
Result:
HINT
Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.
B -- REPLACE FUEL
A -- Continue to next step.
86. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
(a) Check the tightening and installation condition of the crankshaft position sensor bolt.
(b) Check the connection of the crankshaft position sensor connector.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
87. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
(a) Check the harnesses and connectors, referring to DTC P0335 inspection procedure P0335.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
88. CHECK CRANKSHAFT POSITION SENSOR
(a) Replace the crankshaft position sensor Removal.
(b) Check the engine start operation.
OK:
Malfunction has been repaired successfully.
NG -- REPLACE ECM
OK -- END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
89. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Using the Techstream, select the [Control the Fuel Pump / Speed] Active Test.
(d) When performing the Active Test, check for fuel leakage from the fuel pipes.
Result:
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
- Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
B -- INSPECT FUEL PUMP
A -- REPAIR OR REPLACE FUEL LINE
90. INSPECT FUEL PUMP
(a) Remove the fuel suction tube.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
HINT
- Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
- Make sure the internal connector is securely connected.
- Make sure the fuel pump filter is not clogged.
NG -- REPLACE FUEL PUMP
OK -- REPLACE FUEL PRESSURE REGULATOR
91. CHECK FUEL PRESSURE
HINT
For the fuel pressure inspection, refer to the following procedures Testing and Inspection.
(a) Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
Result:
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)
A -- Continue to next step.
92. READ VALUE USING TECHSTREAM (LONG FT #1)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, select and read [Long FT #1] in the Data List.
Result:
B -- REPLACE FUEL INJECTOR
A -- Continue to next step.
93. PERFORM SIMULATION TEST
(a) Check if the idling speed after starting the engine is currently stable and has always been stable in the past.
Result:
HINT
Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.
B -- REPLACE FUEL
A -- Continue to next step.
94. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
(a) Check the tightening and installation condition of the crankshaft position sensor bolt.
(b) Check the connection of the crankshaft position sensor connector.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
95. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
(a) Check the harnesses and connectors, referring to DTC P0335 inspection procedure P0335.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
96. CHECK CRANKSHAFT POSITION SENSOR
(a) Replace the crankshaft position sensor Removal.
(b) Check the engine start operation.
OK:
Malfunction has been repaired successfully.
NG -- REPLACE ECM
OK -- END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
97. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Using the Techstream, select the [Control the Fuel Pump / Speed] Active Test.
(d) When performing the Active Test, check for fuel leakage from the fuel pipes.
Result:
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
- Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
B -- INSPECT FUEL PUMP
A -- REPAIR OR REPLACE FUEL LINE
98. INSPECT FUEL PUMP
(a) Remove the fuel suction tube.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
HINT
- Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
- Make sure the internal connector is securely connected.
- Make sure the fuel pump filter is not clogged.
NG -- REPLACE FUEL PUMP
OK -- Continue to next step.
99. CHECK PURGE VSV
(a) Disconnect the vacuum hose (on the canister side) of the purge VSV.
(b) Start the engine.
(c) Idle the engine.
(d) Disconnect the connector of the purge VSV.
(e) Check if air flows through the purge VSV.
OK:
Air does not flow
(f) Connect the connector of the purge VSV.
(g) Connect the vacuum hose of the purge VSV.
HINT
When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs DTC Check / Clear.
NG -- INSPECT PURGE VSV
OK -- Continue to next step.
100. CHECK FUEL INJECTOR
(a) Clean the inside of the surge tank with compressed air.
(b) After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
Result:
HINT
If the concentration is 400 ppm or higher, a fuel injector may have a sealing problem.
B -- CHECK INTAKE VALVE
A -- REPLACE FUEL INJECTOR
101. CHECK INTAKE VALVE
(a) Check if carbon is on the intake valves.
Result:
B -- READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)
A -- CLEAN INTAKE VALVE
102. READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
(d) Using the Techstream, select and read [ISC Learning Value] in the Data List.
Result:
B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
A -- Continue to next step.
103. CHECK CYLINDER COMPRESSION PRESSURE
(a) Inspect the compression Engine.
NG -- CHECK AND REPAIR ENGINE ASSEMBLY
OK -- CHECK VALVE TIMING
104. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Inspect the engine coolant temperature sensor Testing and Inspection.
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR
OK -- Continue to next step.
105. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
(a) Check the tightening and installation condition of the crankshaft position sensor bolt.
(b) Check the connection of the crankshaft position sensor connector.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
106. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)
(a) Check the tightening and installation condition of the camshaft position sensor bolt.
(b) Check the connection of the camshaft position sensor connector.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
107. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
(a) Check the harnesses and connectors, referring to DTC P0335 inspection procedure P0335.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
108. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)
(a) Check the harnesses and connectors, referring to DTC P0340 inspection procedure P0340.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
109. CHECK CRANKSHAFT POSITION SENSOR
(a) Replace the crankshaft position sensor Removal.
(b) Check the engine start operation.
OK:
Malfunction has been repaired successfully.
NG -- CHECK CAMSHAFT POSITION SENSOR
OK -- END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
110. CHECK CAMSHAFT POSITION SENSOR
(a) Replace the camshaft position sensor Removal.
(b) Check the engine start operation.
OK:
Malfunction has been repaired successfully.
NG -- REPLACE ECM
OK -- END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)
111. GO TO DTC CHART Engine Control System - SFI System
112. REPAIR ENGINE IMMOBILISER SYSTEM How To Proceed With Troubleshooting
113. CHECK STARTER SIGNAL CIRCUIT Cranking Holding Function Circuit
114. CHECK AND REPAIR ENGINE ASSEMBLY OR BATTERY
115. SECURELY REINSTALL SENSOR Installation
116. REPLACE CRANKSHAFT POSITION SENSOR Removal
117. END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) Removal
118. REPAIR OR REPLACE HARNESS OR CONNECTOR
119. CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
120. CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
121. CHECK FUEL INJECTOR CIRCUIT Fuel Injector Circuit
122. CHECK AND REPAIR ENGINE ASSEMBLY
123. REPLACE FUEL INJECTOR Removal
124. REPLACE FUEL PRESSURE REGULATOR Disassembly
125. REPAIR OR REPLACE AIR INDUCTION SYSTEM
126. CHARGE OR REPLACE BATTERY
127. REPAIR OR REPLACE ENGINE ASSEMBLY
128. REPLACE STARTER
129. CHARGE OR REPLACE BATTERY
130. REPLACE STARTER
131. CHECK AND REPAIR ENGINE ASSEMBLY
132. CHARGE OR REPLACE BATTERY
133. CHECK AND REPAIR ENGINE ASSEMBLY
134. REPLACE FUEL PRESSURE REGULATOR Disassembly
135. REPLACE SPARK PLUG Locations
136. CHECK CRANKSHAFT POSITION SENSOR CIRCUIT P0335
137. CHECK IGNITION COIL POWER SOURCE CIRCUIT P0351
138. REPAIR OR REPLACE HARNESS OR CONNECTOR
139. CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
140. CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
141. REPLACE CRANKSHAFT POSITION SENSOR Removal
142. CHECK FUEL INJECTOR CIRCUIT Fuel Injector Circuit
143. REPAIR OR REPLACE AIR INDUCTION SYSTEM
144. REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY
145. REPAIR OR REPLACE HARNESS OR CONNECTOR
146. REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
147. REPAIR OR REPLACE HARNESS OR CONNECTOR
148. REPLACE MASS AIR FLOW METER Removal
149. REPAIR OR REPLACE HARNESS OR CONNECTOR
150. REPLACE AIR FUEL RATIO SENSOR Removal
151. REPLACE FUEL INJECTOR Removal
152. REPLACE SPARK PLUG (ABNORMAL CYLINDER) Locations
153. REPLACE SPARK PLUG (ALL CYLINDER) Locations
154. REPLACE FUEL PRESSURE REGULATOR Disassembly
155. CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
156. REPLACE FUEL INJECTOR Removal
157. CHECK FUEL INJECTOR CIRCUIT Fuel Injector Circuit
158. REPAIR OR REPLACE HARNESS OR CONNECTOR
159. END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) Removal
160. END (CAMSHAFT POSITION SENSOR IS DEFECTIVE) Removal
161. SECURELY REINSTALL SENSOR Installation
162. SECURELY REINSTALL SENSOR Installation
163. END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) Removal
164. END (CAMSHAFT POSITION SENSOR IS DEFECTIVE) Removal
165. REPAIR OR REPLACE HARNESS OR CONNECTOR
166. REPAIR OR REPLACE HARNESS OR CONNECTOR
167. CHECK AND REPAIR ENGINE ASSEMBLY
168. REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
169. REPLACE FUEL INJECTOR Removal
170. REPLACE FUEL
171. SECURELY REINSTALL SENSOR Installation
172. END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) Removal
173. REPAIR OR REPLACE HARNESS OR CONNECTOR
174. REPLACE FUEL PUMP Removal
175. REPLACE FUEL INJECTOR Removal
176. REPLACE FUEL
177. SECURELY REINSTALL SENSOR Installation
178. END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) Removal
179. REPAIR OR REPLACE HARNESS OR CONNECTOR
180. REPLACE FUEL PUMP Removal
181. INSPECT PURGE VSV Testing and Inspection
182. CHECK AND REPAIR ENGINE ASSEMBLY
183. REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
184. SECURELY REINSTALL SENSOR Installation
185. SECURELY REINSTALL SENSOR Installation
186. END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) Removal
187. END (CAMSHAFT POSITION SENSOR IS DEFECTIVE) Removal
188. REPAIR OR REPLACE HARNESS OR CONNECTOR
189. CHARGE OR REPLACE BATTERY
190. REPLACE ECM Removal
191. REPLACE ECM Removal
192. REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
193. REPAIR OR REPLACE FUEL LINE
194. REPAIR OR REPLACE FUEL SYSTEM
195. REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
196. REPAIR OR REPLACE FUEL SYSTEM
197. REPLACE FUEL INJECTOR Removal
198. CLEAN OR REPLACE THROTTLE BODY Removal
199. END
200. INSPECT STARTER
201. REPLACE FLYWHEEL SUB-ASSEMBLY OR DRIVE PLATE AND RING GEAR Removal
202. CHECK STARTER SIGNAL CIRCUIT Cranking Holding Function Circuit
203. INSPECT STARTER
204. REPLACE FUEL INJECTOR Removal
205. REPLACE IGNITION COIL Locations
206. REPAIR OR REPLACE FUEL LINE
207. REPLACE ECM Removal
208. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE Removal
209. REPLACE MASS AIR FLOW METER Removal
210. REPLACE MASS AIR FLOW METER Removal
211. REPLACE FUEL INJECTOR Removal
212. REPAIR OR REPLACE FUEL LINE
213. REPLACE ECM Removal
214. REPLACE ECM Removal
215. CHECK VALVE TIMING Adjustments
216. REPLACE ECM Removal
217. REPAIR OR REPLACE FUEL LINE
218. REPLACE FUEL PRESSURE REGULATOR Disassembly
219. REPLACE ECM Removal
220. REPAIR OR REPLACE FUEL LINE
221. REPLACE FUEL INJECTOR Removal
222. CLEAN INTAKE VALVE
223. CHECK VALVE TIMING Adjustments